BATC Wiki - User contributions [en-gb]

29MHz transverter

2026-05-20T07:53:59Z

G4FRE: /* BOM and schematics */

The popular SDRs that are used to transmit DATV at higher frequencies are the Adlam-pluto and Lime Mini. The pluto does not work below 70MHz and while the Lime Mini does cover 29MHz natively, in practice the spectrum it generates in this region is not sufficiently clean to use on the air. To get round these issues, Mike G0MJW has designed a simple 149 to 29MHz transverter. It is designed to fit into a standard Hammond 1590B 'stompbox' die-cast box.

[[File:29MHz transverter 2.JPG|400px]]

[[File:29MHz transverter 1.JPG|400px]]

=Building the transverter=

==PCBs==

PCBs is stocked in the BATC shop.

The gerber files are available here: [[:File:DVBT_Transverter_rev5.zip]]

==BOM and schematics==

The BOM version by G4KLB is available for download: [[:File:Transverter BOM.xlsx]]

The schematics are available here:[[:Media:DVBT_Transverter.pdf]]

Portsdown transmitter FAQ

2026-02-08T21:03:24Z

G4FRE:

* '''The Portsdown software update deoes not work '''
If you get the message "Unable to contact GitHub for update" "Internet connection to Google seems OK" when trying to perform a software update, it means that the Portsdown cannot download the new software due to a problem with your router or internet connection. The Portsdown can see Google so knows that it is connected to the internet. Check whether you can see this page on another computer on the same network: https://github.com/BritishAmateurTelevisionClub/portsdown4/raw/master/scripts/latest_version.txt

* '''Why can't I download or update the software?'''
We have had reports of problems with downloading software and updates from members with Virgin Media and BT internet connections. The work-round for Virgin Media is described on the GitHub page. BT users should make sure that they have "Web Protect" turned off for the download.

* '''I've just changed my Callsign and now nothing works'''
If you have entered text with spaces in the callsign field, the software will crash (I've tried to cure this, but it's a very difficult problem). The cure is to open an SSH session (using Putty or Kitty), exit to the command line, and then do a factory reset by entering:

cp -f /home/pi/rpidatv/scripts/configs/portsdown_config.txt.factory /home/pi/rpidatv/scripts/portsdown_config.txt

If your software has not been updated since 1 February 2018, then the line that you should enter is:

cp -f /home/pi/rpidatv/scripts/configs/rpidatvconfig.txt.factory /home/pi/rpidatv/scripts/rpidatvconfig.txt

Afterwards, restart the console menu with the command:

/home/pi/rpidatv/scripts/menu.sh menu

* '''How do I prevent regular clicks/thumps on Streamed audio?'''
Check the following: 1. A valid video signal must be present at the input to the EasyCap before you turn the streaming on. 2. The supply voltage, measured on the GPIO pins, should be between 5.0 and 5.1 volts during streaming. 3. The EasyCap should be plugged directly into the RPi or connected by a short, good quality, USB lead.

* '''How do I reduce the background noise/hum on Streamed audio?'''
The poor quality USB leads supplied with the EasyCaps should not be used. The EasyCap should be plugged directly into the RPi or connected by a short, good quality, USB lead.

* '''Why do I get occasional dropouts of the received or streamed picture at 16:9 or 720p?'''
The Raspberry Pi 3 is working at its processing limit at these higher resolutions and occasionally runs out of resources. 16:9 is particularly bad because it is generated by down-scaling 720p, or stretching SD.

* '''Can I use the new Raspberry Pi 3+?'''
Yes. The "Portsdown 2020" software build works on a Raspberry Pi 3+ or a Raspberry Pi 3. Details here: https://github.com/BritishAmateurTelevisionClub/portsdown .

* '''How do I turn the transmitter off in Touchscreen mode?'''
In transmit, the touchscreen is used to monitor outgoing video and so the buttons are no longer visible - to turn the transmitter off, simply touch the screen anywhere.

* '''What do I need to receive a Portsdown transmitter?'''
When a Portsdown transmitter is fitted with a filter / modulator card and running in normal bandwidth modes (above 1 Msymbol/sec) you will be able receive it on any Free to Air (or FreeSat but not Sky or Freeview) satellite Set top box - if you have a High Definition STB you will be able to receive MPEG-2 and MPEG-4.

However, when it is running in RB-TV modes OR in Ugly mode without the Filter Modulator card, you can only receive it using the MiniTiouner USB receiver. This is a BATC supported project with some home construction needed - the hardware components are available from [https://batc.org.uk/shop/minitiouner the BATC shop] and the software is a free download from F6DZP [[MiniTioune|see here for more details]].

*'''Can I use another touchscreen LCD?'''
The Portsdown project only supports the 3.5" Waveshare screen - that doesn't mean to say others won't work but we can't help you if it doesn't. The Official Raspberry Pi 7" touchscreen (often referred to as a "7 inch Element 14 touchscreen") https://www.element14.com/community/docs/DOC-78156/l/raspberry-pi-7-touchscreen-display is the only recommended alternative. HDMI-connected touchscreens are not suitable.

*'''Can I use a Raspberry Pi 2?'''
You can try it, but some capabilities will not work. For example, the RPi 2 does not seem to be capable of handling analogue capture properly and puts streaks across the picture. The Pi Camera is less demanding and has been demonstrated to work with an RPi 2 in some circumstances. The project team will not support the RPi 2 - please just buy an RPi 3.

*'''Who are the Portsdown team?'''
The Portsdown team are just BATC members doing this as volunteers to support the ATV community. As such, it is not their full time job and they are not being paid. If you have a problem, question or comment, please do not contact them directly but use the [https://forum.batc.org.uk/viewforum.php?f=103 BATC members forum] but there may not always be an instant response!

And yes we are looking for people to help with the project - if you can write Linux, update Wiki pages or reply to forum posts we want to hear from you!

*'''Do I need to know about Linux or other clever computer stuff to get Portsdown running?'''
NO - the Portsdown transmitter has been designed to "work out of the box":
*You do not need to do anything other than follow the [[Initial setup|initial set up guide]]
*Do not load any device drivers
*Do not tinker with Linux commands
If you do, we don't have time to support you and will just advise you to reformat your SD card and start again!'''

*'''Is Portsdown MPEG-2 or MPEG-4?'''
Both - The RPi hardware encoder runs MPEG-4 and the Portsdown software has an MPEG-2 encoder both of which are used in the Portsdown transmitter.

* '''When I type my password, the cursor does not move. Is this right?'''

Yes. Passwords typed at the command line in Linux do not cause the cursor to move. You just have to type carefully; if you make a mistake just backspace lots of times and then start the password again.

*'''How do I get out of touch screen back in to console mode?'''

The process is very similar to initial set up and is done by using an external PC with 2 pieces of software - the first application is to find the IP address of your RPi when it first boots up, such as [http://www.advanced-ip-scanner.com/ Advanced IP Scanner] and an SSH Terminal application such as [http://www.chiark.greenend.org.uk/~sgtatham/putty/ Putty].

*Connect the RPi to the same network as your PC, and either check on the touchscreen "info" page (on Menu 3) or use the IP Scanner to find the IP address of your RPi.

*Open Putty and enter the IP address of your RPi and open a connection. At the logon prompt enter the default username of pi and the password given to you with the card.

The console menu should start automatically and the touchscreen will display the BATC logo.

Note, if the console menu does not appear and you end up at the Linux Command Line, you can get back to the Main Console Menu by typing:

/home/pi/rpidatv/scripts/menu.sh menu

*'''When I Log-on or start the Console Menu, it goes Straight to the Exit Screen. How do I recover?'''

If you accidentally enter a space character when entering the frequency or symbol rate, the Menu software fails and tries to exit. You can recover by typing the command:

cp -f /home/pi/rpidatv/scripts/configs/portsdown_config.txt.factory /home/pi/rpidatv/scripts/portsdown_config.txt

at the Linux command line, and then restarting the console menu with the command:

/home/pi/rpidatv/scripts/menu.sh menu

*'''How Can I update my Portsdown Software?'''

As long as you have an internet connection, you can update your Portsdown Software to the latest version from the Console Menu or the touchscreen Menu 3. Full instructions are here: [[Updating your Portsdown Software]]

*'''Where can I get a diagram of all the RPi GPIO pins?'''

The full wiring listing for the RPi GPIO is here

[[PTT and band switching#Summary_of_GPIO_connections]]

*'''The lock LED on the ADF4351 board does not come on'''

The lock light only comes on when in Portsdown/IQ mode and you are on Transmit

Portsdown DMM Display and Logger

2025-10-08T11:14:38Z

G4FRE:

The Portsdown Digital Multimeter display and logger works with a modified Parkside PDM300 C3 multimeter (seasonally available for £11.99 from Lidl) to display and log the meter readings. It is selected from Menu 2, Test Equipment, DMM Display.

[[File:PDM 300 C3.jpg|100px]]

===Modification of the DMM===

'''Warning - this modification relies on careful construction and an opto-isolator to keep up to 300V AC away from yourself and your Portsdown Raspberry Pi. DO NOT attempt this modification if you are not confident in your construction abilities.'''

The DMM has an internal (live at the measurement voltage) test point where an opto-isolator can be connected to pick up a 2400 baud serial data stream. Most published modifications (https://www.mikrocontroller.net/articles/Multimeter_PDM-300-C2_Analyse#Testpunkte and https://github.com/benedikts-workshop/ParksideView) recommend fitting the opto-isolator between the test point and ground. However, this draws current for 90% of the time and significantly reduces the internal 9v battery life.

It is recommended that the opto-isolator is fitted between the test point and Vdd with a 1K5 resistor in series. This means that there is only a marginal increase in supply current. I connected the output of the opto-isolator to a 3.5mm jack socket mounted on the front of the meter.

[[File:Internal Mod.jpg|200px]][[File:Opto socket.jpg|400px]]

The complete circuit of the modification and Portsdown interface is shown below.
[[File:Interface Circuit.jpg|800px]]

Other opto-isolators can be used - mine was sourced from the junk box. If the opto-isolator has lower gain, the 4k7 between the transistor base and the +3 volt supply may need to be increased to 10k.

The amplifier transistor (BC108 or any medium-high gain npn) was required because GPIO pin 3 on the Raspberry Pi is intended for use with i2c, and I was unable to disable the internal pullup. This results in the input signal to the GPIO pin being idle = mark = data 1 = 0v, and start bit = space = data 0 = +3.3v. The serial data is 2400 baud, inverted serial signals. This can be decoded by selecting "Serial Pol Inverted" from the "More Settings" menu and restarting the application.

A battery capacity testing application is described below that monitors (and plots) the voltage of a rechargeable battery and disconnects the load when it reaches a preset "discharged" voltage. The relay for disconnecting the load is be operated from the Raspberry Pi pin 26 (GPIO 7). This is the same pin as is used for switching the Noise Source in the NF Meter, and is found on pin 7 of the Portsdown 25-way interface connector.

===Use with Portsdown===

After building the interface, connect the Portsdown and turn it on. Go to Menu 2, Test Equipment, DMM Display. There are 3 modes available from the "Mode" menu:
* Large Number DMM Display
* Running Plot
* Battery capacity calculation
Note that the screen image is also available on the web interface, but no control is possible - that must be done from the touchscreen.

The Parkside Meter has a "Battery Save" function that turns the meter off after 15 minutes. To disable this for long duration testing, press and hold the red "Select" button whilst initially turning the meter on. The small "power" symbol in the very top left of the display will be turned off to show that the Power Save funtion is not activated. Battery life in this mode is estimated at 400 hours or so.

====Large Number DMM Display====

Select DC Voltage on the meter; the Portsdown should display the same digits as the DMM. There is occasionally an error of one in the LSB - this seems to be a rounding error inside the DMM.

ONLY DC Voltage has been tested so far.

[[File:Initial Screen.jpg|400px]]

====Running Plot====

Selection of "Running Plot" gives a graphical display of the meter reading. The Settings menu allows the selection of the plot baseline value and the plot maximum value.

The time span of the plot can also be selected from the Settings Menu. Selecting "Plot Span Minutes" also allows selection of the most detailed span - 1 pixel per sample. The Parkside meter takes a sample about every 800 ms.

The "More Settings" menu allows selection of a single-span mode, selection of an alternate DMM Type (the Maplin/Precision Gold N56FU - not yet implemented), selection of a reversed polarity serial input, and editing the Title line displayed at the botton of the graph.

A .csv file of the last 501 readings can be saved by pressing the "Save .csv File" button on the "Actions" menu. The file is saved in the /home/pi/snaps folder on the SD Card.

====Battery Capacity====

The battery capacity testing application monitors (and plots) the voltage of a rechargeable battery and disconnects its load when it reaches a preset "discharged" voltage. Select it from the Mode menu.

The relay for disconnecting the load is operated from the Raspberry Pi pin 26 (GPIO 7). This is the same pin as is used for switching the Noise Source in the NF Meter, and is found on pin 7 of the Portsdown 25-way interface connector. It goes high to switch the load on, and low to switch it off.

The "Discharge Setup" menu allows the conditions for the test to be set.
* The Initial current at the start of discharge should be measured and entered; the load switch can be turned on from this menu to enable this to be done.
* Select whether the load is resistive (discharge current reduced in proportion to voltage reduction) or "Constant I" (constant discharge current).
* Set the Voltage at which the battery is considered to be fully discharged. The test will self-terminate when this voltage is reached to prevent over-discharge of the battery.
* Set the discharge duration in hours. '''ALWAYS''' set this to longer than the planned discharge as the plot will only run for a single span.

The return the the "Actions" Menu via the Main Menu.
* Press "Start Test" to start the test. The Load will turn on (red) and the meter will start logging the voltage and calculating the capacity provided so far.
[[File:Discharge.jpg|800px]]

The capacity is displayed at the bottom right.
* The test can be paused briefly, or restarted. The 4th button down shows the status of the test.

When the measured voltage reaches the previously set Discharge voltage, the load will be turned off, the plot stopped, and a screenshot (snap) of the screen stored in the /home/pi/snaps folder. Note that if the voltage falls to anything less than 0.5v, the test is not immediately terminated as this is unlikely to have been caused by a normal discharge and is probably a connection issue!

A .csv file of the discharge voltage can be saved by pressing the button on the Actions Menu.

Portsdown DMM Display and Logger

2025-10-08T11:13:21Z

G4FRE:

The Portsdown Digital Multimeter display and logger works with a modified Parkside PDM300 C3 multimeter (seasonally available for £11.99 from Lidl) to display and log the meter readings. It is selected from Menu 2, Test Equipment, DMM Display.

[[File:PDM 300 C3.jpg|100px]]

===Modification of the DMM===

'''Warning - this modification relies on careful construction and an opto-isolator to keep up to 300V AC away from yourself and your Portsdown Raspberry Pi. DO NOT attempt this modification if you are not confident in your construction abilities.'''

The DMM has an internal (live at the measurement voltage) test point where an opto-isolator can be connected to pick up a 2400 baud serial data stream. Most published modifications (https://www.mikrocontroller.net/articles/Multimeter_PDM-300-C2_Analyse#Testpunkte and https://github.com/benedikts-workshop/ParksideView) recommend fitting the opto-isolator between the test point and ground. However, this draws current for 90% of the time and significantly reduces the internal 9v battery life.

It is recommended that the opto-isolator is fitted between the test point and Vdd with a 1K5 resistor in series. This means that there is only a marginal increase in supply current. I connected the output of the opto-isolator to a 3.5mm jack socket mounted on the front of the meter.

[[File:Internal Mod.jpg|200px]][[File:Opto socket.jpg|400px]]

The complete circuit of the modification and Portsdown interface is shown below.
[[File:Interface Circuit.jpg|800px]]

Other opto-isolators can be used - mine was sourced from the junk box. If the opto-isolator has lower gain, the 4k7 between the transistor base and the +3 volt supply may need to be increased to 10k.

The amplifier transistor (BC108 or any medium-high gain npn) was required because GPIO pin 3 on the Raspberry Pi is intended for use with i2c, and I was unable to disable the internal pullup. This results in the input signal to the GPIO pin being idle = mark = data 1 = 0v, and start bit = space = data 0 = +3.3v. The serial data is 2400 baud. Inverted serial signals (as provided by the circuit above) can be decoded by selecting "Serial Pol Inverted" from the "More Settings" menu and restarting the application.

A battery capacity testing application is described below that monitors (and plots) the voltage of a rechargeable battery and disconnects the load when it reaches a preset "discharged" voltage. The relay for disconnecting the load is be operated from the Raspberry Pi pin 26 (GPIO 7). This is the same pin as is used for switching the Noise Source in the NF Meter, and is found on pin 7 of the Portsdown 25-way interface connector.

===Use with Portsdown===

After building the interface, connect the Portsdown and turn it on. Go to Menu 2, Test Equipment, DMM Display. There are 3 modes available from the "Mode" menu:
* Large Number DMM Display
* Running Plot
* Battery capacity calculation
Note that the screen image is also available on the web interface, but no control is possible - that must be done from the touchscreen.

The Parkside Meter has a "Battery Save" function that turns the meter off after 15 minutes. To disable this for long duration testing, press and hold the red "Select" button whilst initially turning the meter on. The small "power" symbol in the very top left of the display will be turned off to show that the Power Save funtion is not activated. Battery life in this mode is estimated at 400 hours or so.

====Large Number DMM Display====

Select DC Voltage on the meter; the Portsdown should display the same digits as the DMM. There is occasionally an error of one in the LSB - this seems to be a rounding error inside the DMM.

ONLY DC Voltage has been tested so far.

[[File:Initial Screen.jpg|400px]]

====Running Plot====

Selection of "Running Plot" gives a graphical display of the meter reading. The Settings menu allows the selection of the plot baseline value and the plot maximum value.

The time span of the plot can also be selected from the Settings Menu. Selecting "Plot Span Minutes" also allows selection of the most detailed span - 1 pixel per sample. The Parkside meter takes a sample about every 800 ms.

The "More Settings" menu allows selection of a single-span mode, selection of an alternate DMM Type (the Maplin/Precision Gold N56FU - not yet implemented), selection of a reversed polarity serial input, and editing the Title line displayed at the botton of the graph.

A .csv file of the last 501 readings can be saved by pressing the "Save .csv File" button on the "Actions" menu. The file is saved in the /home/pi/snaps folder on the SD Card.

====Battery Capacity====

The battery capacity testing application monitors (and plots) the voltage of a rechargeable battery and disconnects its load when it reaches a preset "discharged" voltage. Select it from the Mode menu.

The relay for disconnecting the load is operated from the Raspberry Pi pin 26 (GPIO 7). This is the same pin as is used for switching the Noise Source in the NF Meter, and is found on pin 7 of the Portsdown 25-way interface connector. It goes high to switch the load on, and low to switch it off.

The "Discharge Setup" menu allows the conditions for the test to be set.
* The Initial current at the start of discharge should be measured and entered; the load switch can be turned on from this menu to enable this to be done.
* Select whether the load is resistive (discharge current reduced in proportion to voltage reduction) or "Constant I" (constant discharge current).
* Set the Voltage at which the battery is considered to be fully discharged. The test will self-terminate when this voltage is reached to prevent over-discharge of the battery.
* Set the discharge duration in hours. '''ALWAYS''' set this to longer than the planned discharge as the plot will only run for a single span.

The return the the "Actions" Menu via the Main Menu.
* Press "Start Test" to start the test. The Load will turn on (red) and the meter will start logging the voltage and calculating the capacity provided so far.
[[File:Discharge.jpg|800px]]

The capacity is displayed at the bottom right.
* The test can be paused briefly, or restarted. The 4th button down shows the status of the test.

When the measured voltage reaches the previously set Discharge voltage, the load will be turned off, the plot stopped, and a screenshot (snap) of the screen stored in the /home/pi/snaps folder. Note that if the voltage falls to anything less than 0.5v, the test is not immediately terminated as this is unlikely to have been caused by a normal discharge and is probably a connection issue!

A .csv file of the discharge voltage can be saved by pressing the button on the Actions Menu.

Portsdown NF Meter

2025-10-01T15:37:23Z

G4FRE: /* Lime/Pluto Gain */

The Portsdown 4 includes a Noise Figure Meter that uses the LimeSDR Mini or a Pluto SDR with a user-provided noise source and custom switching power supply to provide an indication of the performance of preamps and transverters. This capability was described in CQ-TV 274 (Winter 2021).

==General Principle==

The limiting factor on the performance of many microwave receivers and some VHF receivers is the amount of noise generated by the input stage of the receiver. G8GTZ discussed this in his excellent [https://www.youtube.com/watch?v=lfSi7vTQK44 CAT 21 Video] which is essential viewing before trying to use the Portsdown 4 Noise Figure Meter.

The input stage noise can be estimated by making comparisons between the receiver output with no input, and its output when connected a calibrated low-level noise source. This is the method used by the popular HP Noise Figure meters and the method used in the Portsdown. The noise source is permanently connected and switched on and off at about 10 Hz. The noise level at the output if the preamp/transverter is measured during the on and the off periods, averaged, and then the noise contribution of the receiver itself can be calculated.

The noise contribution from amateur preamps and transverters is normally stated as a logarithmic "Noise Figure" measured in dB. Levels around 3 dB are acceptable for VHF receivers (where there is a lot of atmospheric noise) whereas good microwave receivers typically achieve between 1 and 2 dB. Lower noise figures are desirable for EME and satellite use where the background noise is much lower. Lower noise figures may also be stated as a noise temperature. There is a direct logarithmic relationship betwen the two. This Wiki page provides a full explanation: https://en.wikipedia.org/wiki/Noise_temperature .

==Equipment Required==

[[File:NF Block Diagram.jpg|800px]]

To measure noise figure using the Portsdown 4, a Lime SDR Mini (or a Pluto SDR), calibrated noise source and matching switched power supply are required.

====Noise heads====

A noise head does exactly what it says - generates a known level of noise when supplied with a switched voltage controlled by the RPi 4 GPIO pin.

All noise heads have an "Excess Noise Ratio" (ENR) which is a measure of the noise that they produce. Professional units will have a calibration chart or table stating how this ENR varies with frequency. Typical ENR values are 5 or 15 dB.

The accuracy of the noise figure meter is limited by the accuracy of the noise source ENR calibration. However, an uncalibrated noise source can still provide a very valuable alignment aid.

If you do not have a calibrated HP or similar noise source, they are actually easy to build. This webpage has an easy to build design (but note it requires -9v switched supply) complete with expected ENR charts and a PCB design which is available to order from OSH Park http://www.janbob.com/electron/Noise/NoiseGen1.htm

Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart.

Alternatively, G8FEK of RF Design sells some suitable models: https://g8fek.com/precision-noise-sources.html . Note that both these precision noise sources need a 13.5 to 28V (30v absolute maximum) supply.

====Noise head PSU====

The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again.

Many professional noise sources (as used by HP) need a 28v supply in their on state.

The drive for the noise source switching comes from pin 26 of the Portsdown GPIO port, and is at 3.3v when the noise source is on, and 0v when the noise source is off.

BATC are producing a PCB which will be in the member's shop. The design is described here [[Noise Source PSU]].

==Preparing for a Measurement==

Ensure you have the latest Portsdown software loaded (Version 202110300 published Nov 2nd 2021 or later) and connect your LimeSDR to the Portsdown by USB. Note - the LimeSDR should have gateware V1.30 or the LimeDVB gateware loaded.

Connect your switched power supply to pin 26 of the Portsdown GPIO.

Apply the switched power supply to the Noise Source and initially (assuming a 15 dB or 5 dB ENR noise source) connect the noise source directly to the LimeSDR Mini receive port.

From Menu 2, select Test Equipment, NF Meter. After the levels have settled (which may take 10 seconds or so) you should see the screen below.

[[File:nfmeter.jpg|400px]]

===Setup Menu===

This is the Set-up Menu. If all is working correctly, you should see 2 flickering lines on the band viewer window. The lower line is the detected noise with the noise source off, and the upper line is the detected noise with the noise source on.

====Setting the Measurement Frequency====

Press "Return to Main menu", "Freq and Bandwidth" and then "Centre Freq". Set your desired measurement frequency. Alternatively, you can use one of the presets (146.5, 437, 748, 1255 or 2409). Then select "Set-up Menu" again. The entered frequency should be the signal frequency if you are testing a preamp etc.

====Measurement bandwidth====

It is suggested that the measurement bandwidth is left at 2 MHz (as was standard on the early HP Noise Figure meters) but it can be adjusted down to 500 kHz (LimeSDR only - the Pluto is limited to 2 MHz) and up to 20 MHz at this point.

====ENR====

Next, you need to enter the ENR of your noise source. Touch the ENR button and enter the exact ENR for your noise source at the selected frequency (read from its calibration chart).

====Lime/Pluto Gain====

Now, the gain of the LimeSDR or Pluto needs to be adjusted so that it is operating in its linear region. With the noise source connected directly to the Lime SDR, use the "Gain Up" and "Gain Down" buttons, so that the "Noise Off" level shown at the bottom left of the screen is between -65 dB and -55 dB (LimeSDR) or between -52 dB and -42 dB (Pluto). If set too low, the indication will change colour and a message advising an increase in Lime/Pluto Gain will be displayed. If the gain is set too high, there is a risk that high gain preamps may overload the system when tested, leading to inaccurate readings.

The Meter will now display the Noise Figure of your LimeSDR. This is very dependent on screening and digital noise pickup, but should be in the range 5 dB to 10 dB between 146 and 1255 MHz.

==Making a Simple Measurement==

If you now insert your preamp or transverter (the Device Under Test) between the noise source and the LimeSDR, you should see the "System" NF improve (hopefully) and you can make adjustments to your device to optimise its performance.

What is displayed on the NF Meter is the noise figure of the system comprising your device and the LimeSDR. This means that if your device has low gain, the LimeSDR might introduce a contribution to the total measured noise figure. However, this mode enables quick and easy optimisation, and is very useful for general bench testing.

===Measuring Gain and NF of a Preamp===

By calibrating the noise levels of the LimeSDR, it is then possible to calculate the Gain and NF of a preamp and exclude the NF contribution of the LimeSDR Mini or Pluto. This procedure only works for one frequency and one Gain setting, and needs to be repeated if frequency, Gain or Bandwidth are altered.

Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.

To perform the calibration, connect the noise head directly to the LimeSDR, and set the frequency, bandwidth and gain as specified above. Then, in the Set-up Menu, press "Calibrate". The system will average a number of readings and then display the "Device" noise figure and gain, which should be around zero. Now put your preamp in circuit, and the meter will display the preamp (the "Device") noise figure and gain as shown below.

[[File:nfdevice.jpg|400px]]

Once calibrated, the Gain buttons are locked (as adjusting them would invalidate the calibration). To adjust the Gain, press the "Calibrated" button again to come out of Calibrated mode.

===Measuring a Transverter or Receive Converter===

When measuring a transverter '''the measurement frequency should be the IF frequency'''.

====Simple Transverter NF Measurements====

For simple "system" measurements, the ENR entered should be the ENR at the signal frequency (for example 10 GHz), not the IF frequency (eg 144 or 432 MHz).

====Measuring true Transverter Gain and NF====

It is possible to provide a good indication of the transverter gain and noise figure, however the procedure is much more complex. First, the NF Meter should be calibrated at the IF frequency using the ENR for the noise source at the IF frequency. Once the instrument calibration is complete, then the transverter can be put into circuit with a noise source for its input frequency. The "Set Input ENR" button should then be pressed, and the second ENR value for the input frequncy (eg 10 GHz) entered. The NF Meter and Gain will then indicate Transverter NF and Transverter gain to show that it is calculating using the 2 ENRs, one at IF and one at signal frequency.

Great care needs to be taken, by using IF filtering, to ensure that no local oscillator signals are presented to the lime receiver, and that only one sideband of the first mixer is being measured. A good image filter (after the first RF preamplifier in the transverter) is essential.

===Meter Scale===

The "analog" meter has 5 scale settings: a wide 30 to 0 dB, narrower 30 to 20 dB, 20 to 10 dB and 10 to 0 dB, and a narrow 5 t0 0 dB. You can move between these scales by touching the right or left side of the meter face. Note that the meter reads lower noise figure (better) to the right, and higher noise figure to the left. This is the convention followed on older analog Noise Figure meters.

===Sources of Error===

Interference in the passband. Not the DC spike - this is ignored.

Noise Source reflection coefficient changes between the on and off state.

SDR non-linearity

Temperature effects on SDR

Temperature effects on Noise soorce

===References:===

[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]

[https://g8fek.com/uploads/9/4/4/3/94435411/an57-2_5952-3706e_hp_nf_measurement_primer.pdf Agilent Application Note 57-2: Noise Figure Measurement Accuracy – The Y-Factor Method]

Portsdown NF Meter

2025-10-01T15:02:20Z

G4FRE: /* Sources of Error */

The Portsdown 4 includes a Noise Figure Meter that uses the LimeSDR Mini or a Pluto SDR with a user-provided noise source and custom switching power supply to provide an indication of the performance of preamps and transverters. This capability was described in CQ-TV 274 (Winter 2021).

==General Principle==

The limiting factor on the performance of many microwave receivers and some VHF receivers is the amount of noise generated by the input stage of the receiver. G8GTZ discussed this in his excellent [https://www.youtube.com/watch?v=lfSi7vTQK44 CAT 21 Video] which is essential viewing before trying to use the Portsdown 4 Noise Figure Meter.

The input stage noise can be estimated by making comparisons between the receiver output with no input, and its output when connected a calibrated low-level noise source. This is the method used by the popular HP Noise Figure meters and the method used in the Portsdown. The noise source is permanently connected and switched on and off at about 10 Hz. The noise level at the output if the preamp/transverter is measured during the on and the off periods, averaged, and then the noise contribution of the receiver itself can be calculated.

The noise contribution from amateur preamps and transverters is normally stated as a logarithmic "Noise Figure" measured in dB. Levels around 3 dB are acceptable for VHF receivers (where there is a lot of atmospheric noise) whereas good microwave receivers typically achieve between 1 and 2 dB. Lower noise figures are desirable for EME and satellite use where the background noise is much lower. Lower noise figures may also be stated as a noise temperature. There is a direct logarithmic relationship betwen the two. This Wiki page provides a full explanation: https://en.wikipedia.org/wiki/Noise_temperature .

==Equipment Required==

[[File:NF Block Diagram.jpg|800px]]

To measure noise figure using the Portsdown 4, a Lime SDR Mini (or a Pluto SDR), calibrated noise source and matching switched power supply are required.

====Noise heads====

A noise head does exactly what it says - generates a known level of noise when supplied with a switched voltage controlled by the RPi 4 GPIO pin.

All noise heads have an "Excess Noise Ratio" (ENR) which is a measure of the noise that they produce. Professional units will have a calibration chart or table stating how this ENR varies with frequency. Typical ENR values are 5 or 15 dB.

The accuracy of the noise figure meter is limited by the accuracy of the noise source ENR calibration. However, an uncalibrated noise source can still provide a very valuable alignment aid.

If you do not have a calibrated HP or similar noise source, they are actually easy to build. This webpage has an easy to build design (but note it requires -9v switched supply) complete with expected ENR charts and a PCB design which is available to order from OSH Park http://www.janbob.com/electron/Noise/NoiseGen1.htm

Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart.

Alternatively, G8FEK of RF Design sells some suitable models: https://g8fek.com/precision-noise-sources.html . Note that both these precision noise sources need a 13.5 to 28V (30v absolute maximum) supply.

====Noise head PSU====

The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again.

Many professional noise sources (as used by HP) need a 28v supply in their on state.

The drive for the noise source switching comes from pin 26 of the Portsdown GPIO port, and is at 3.3v when the noise source is on, and 0v when the noise source is off.

BATC are producing a PCB which will be in the member's shop. The design is described here [[Noise Source PSU]].

==Preparing for a Measurement==

Ensure you have the latest Portsdown software loaded (Version 202110300 published Nov 2nd 2021 or later) and connect your LimeSDR to the Portsdown by USB. Note - the LimeSDR should have gateware V1.30 or the LimeDVB gateware loaded.

Connect your switched power supply to pin 26 of the Portsdown GPIO.

Apply the switched power supply to the Noise Source and initially (assuming a 15 dB or 5 dB ENR noise source) connect the noise source directly to the LimeSDR Mini receive port.

From Menu 2, select Test Equipment, NF Meter. After the levels have settled (which may take 10 seconds or so) you should see the screen below.

[[File:nfmeter.jpg|400px]]

===Setup Menu===

This is the Set-up Menu. If all is working correctly, you should see 2 flickering lines on the band viewer window. The lower line is the detected noise with the noise source off, and the upper line is the detected noise with the noise source on.

====Setting the Measurement Frequency====

Press "Return to Main menu", "Freq and Bandwidth" and then "Centre Freq". Set your desired measurement frequency. Alternatively, you can use one of the presets (146.5, 437, 748, 1255 or 2409). Then select "Set-up Menu" again. The entered frequency should be the signal frequency if you are testing a preamp etc.

====Measurement bandwidth====

It is suggested that the measurement bandwidth is left at 2 MHz (as was standard on the early HP Noise Figure meters) but it can be adjusted down to 500 kHz (LimeSDR only - the Pluto is limited to 2 MHz) and up to 20 MHz at this point.

====ENR====

Next, you need to enter the ENR of your noise source. Touch the ENR button and enter the exact ENR for your noise source at the selected frequency (read from its calibration chart).

====Lime/Pluto Gain====

Now, the gain of the LimeSDR or Pluto needs to be adjusted so that it is operating in its linear region. Use the "Gain Up" and "Gain Down" buttons, so that the "Noise Off" level shown at the bottom left of the screen is between -65 dB and -55 dB (LimeSDR) or between -52 dB and -42 dB (Pluto). If set too low, the indication will change colour and a message advising an increase in Lime/Pluto Gain will be displayed. If the gain is set too high, there is a risk that high gain preamps may overload the system when tested, leading to inaccurate readings.

The Meter will now display the Noise Figure of your LimeSDR. This is very dependent on screening and digital noise pickup, but should be in the range 5 dB to 10 dB between 146 and 1255 MHz.

==Making a Simple Measurement==

If you now insert your preamp or transverter (the Device Under Test) between the noise source and the LimeSDR, you should see the "System" NF improve (hopefully) and you can make adjustments to your device to optimise its performance.

What is displayed on the NF Meter is the noise figure of the system comprising your device and the LimeSDR. This means that if your device has low gain, the LimeSDR might introduce a contribution to the total measured noise figure. However, this mode enables quick and easy optimisation, and is very useful for general bench testing.

===Measuring Gain and NF of a Preamp===

By calibrating the noise levels of the LimeSDR, it is then possible to calculate the Gain and NF of a preamp and exclude the NF contribution of the LimeSDR Mini or Pluto. This procedure only works for one frequency and one Gain setting, and needs to be repeated if frequency, Gain or Bandwidth are altered.

Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.

To perform the calibration, connect the noise head directly to the LimeSDR, and set the frequency, bandwidth and gain as specified above. Then, in the Set-up Menu, press "Calibrate". The system will average a number of readings and then display the "Device" noise figure and gain, which should be around zero. Now put your preamp in circuit, and the meter will display the preamp (the "Device") noise figure and gain as shown below.

[[File:nfdevice.jpg|400px]]

Once calibrated, the Gain buttons are locked (as adjusting them would invalidate the calibration). To adjust the Gain, press the "Calibrated" button again to come out of Calibrated mode.

===Measuring a Transverter or Receive Converter===

When measuring a transverter '''the measurement frequency should be the IF frequency'''.

====Simple Transverter NF Measurements====

For simple "system" measurements, the ENR entered should be the ENR at the signal frequency (for example 10 GHz), not the IF frequency (eg 144 or 432 MHz).

====Measuring true Transverter Gain and NF====

It is possible to provide a good indication of the transverter gain and noise figure, however the procedure is much more complex. First, the NF Meter should be calibrated at the IF frequency using the ENR for the noise source at the IF frequency. Once the instrument calibration is complete, then the transverter can be put into circuit with a noise source for its input frequency. The "Set Input ENR" button should then be pressed, and the second ENR value for the input frequncy (eg 10 GHz) entered. The NF Meter and Gain will then indicate Transverter NF and Transverter gain to show that it is calculating using the 2 ENRs, one at IF and one at signal frequency.

Great care needs to be taken, by using IF filtering, to ensure that no local oscillator signals are presented to the lime receiver, and that only one sideband of the first mixer is being measured. A good image filter (after the first RF preamplifier in the transverter) is essential.

===Meter Scale===

The "analog" meter has 5 scale settings: a wide 30 to 0 dB, narrower 30 to 20 dB, 20 to 10 dB and 10 to 0 dB, and a narrow 5 t0 0 dB. You can move between these scales by touching the right or left side of the meter face. Note that the meter reads lower noise figure (better) to the right, and higher noise figure to the left. This is the convention followed on older analog Noise Figure meters.

===Sources of Error===

Interference in the passband. Not the DC spike - this is ignored.

Noise Source reflection coefficient changes between the on and off state.

SDR non-linearity

Temperature effects on SDR

Temperature effects on Noise soorce

===References:===

[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]

[https://g8fek.com/uploads/9/4/4/3/94435411/an57-2_5952-3706e_hp_nf_measurement_primer.pdf Agilent Application Note 57-2: Noise Figure Measurement Accuracy – The Y-Factor Method]

5.6 GHz

2025-09-09T17:31:21Z

G4FRE: /* PicDream II */

[[File:5.6 GHz Orientation Small.jpg|300px|center]]
It is very easy (and low cost) to get on the air on 5.6GHz (the 6 cm amateur band), using the cheap modules intended to transmit “First Person Video” (FPV) back from drones to their operators. These units can be used without any modifications to get on air, and with simple WiFi plate or dish antennas (and a clear line of sight path) can be used to send pictures to stations using the same equipment over paths in excess of 50km.

M0KPW has an excellent website describing his 5.6GHz system http://www.5-6ghz-atv.co.uk/

==Frequency choice==

The overall UK amateur band plan is shown on the RSGB website here: https://rsgb.org/main/operating/band-plans/. As the UK amateur frequency allocation for 5 GHz is not contiguous spectrum, the RSGB has some [https://rsgb.org/main/operating/band-plans/microwaves/5-7-and-10ghz/ useful guidance] which is adapted below with arrow markers:-

[[File:bandplan.JPG|800px]]

GB3KM has a licensed input on 5665 MHz and this has been chosen as the primary ATV operating frequency. Audio WB-FM operators have been using 5825 and 5840 MHz. 5825 MHz is too close to the band edge for ATV, and 5840 MHz is marginal. So 5665 is the general ATV preference

The FPV equipment receive and transmit frequencies are set using DIP switches, and most tune to 5665 MHz – but care needs to be taken when selecting equipment to make sure it does cover this frequency. Example channel tables are shown at the bottom of this page.

==Equipment==

The FPV units are widely advertised on eBay and other sites with titles similar to “Tarot 5.8G 600MW Telemetry TX/RX Combo for FPV Image Transmission TL300N” and are available at reasonable prices. The typical units are very small but have reasonable FM-TV performance with a quoted transmitter spec of 600mW output and receiver sensitivity of -80dBm. Amplifiers are available to raise the output power to 2 watts or more.

[[File:Tairot 1.jpg|400px]]

Be aware – we have found that on some receiver units, the video output is on the Red phono lead and not the expected Yellow lead!

Some other users' stations are described here [[5.6 GHz Equipment Examples]].

===Mounting the equipment===
Due to the very high losses in co-ax cable at 5.6GHz it is recommended that you mount the units very close to the antennas and run long 12V dc, audio and video cables back down to the shack or operating position.

Be aware also, that whilst these units are very small they do run very hot in operation, and it is suggested that you provide a good heatsink for both Tx and Rx – mounting them in a diecast box on the back of their respective antennas is ideal.

[[File:GKQ 5.6v2.JPG|600px]]

Details of G8GKQ's transceiver setup is shown here (receiver unit on left & transmitter with fan on the right)

===Transmit amplifiers===

Whilst the basic units work very well and have been used to transmit over paths of 60km, power amplifiers to boost the 600mW transmitter signal to 2—4 Watts are available from several suppliers on eBay and other sites, and will significantly increase the path length that the units will work over. These amplifiers should be connected after the transmit unit, but before any antenna change over relay(s) – and remember that his will increase the volt drop on any long 12V cable feeding the transmitter at the masthead.

Be warned!! Several users have found these PAs to be "fragile", so you should always make sure that the antenna is connected – and all connectors done up tight – before applying dc or RF power. We are investigating whether they can be made more reliable by reducing the volts / input drive.

[[File:56PA.jpg|200px]]

==Antenna changeover relays==

The FPV equipment comes as separate Tx and Rx units. In order to operate on a single antenna, you will need an antenna changeover relay. Note, however, that the losses at 5.6GHz can be significant and care must be taken when wiring up the units to ensure RF cables are of good quality, and kept to a minimum length – semi-rigid cables fitted with SMA connectors are ideal.

PL259 and even BNC connectors are very lossy at 5.6GHz and should not be used, but the surplus SMA relays often available at rallys are ideal for 5.6 GHz.

See [[Antennae changeover relays|this wiki page]] for more details on suitable relays, 24 volt operation, and 4 port (or transfer) relays.

If no suitable relay is available, it may be cheaper to use separate antennas for receive and transmit as shown in the picture below – note the Tx and Rx units are mounted directly on the back of the flat panel antennas.

[[File:562.jpg|200px]]

===Reverse SMA===

Be aware that all the 5.6GHz FPV units use "reverse SMA" connectors (as used on WiFi equipment) and that all low-loss cables (unless bought specifically for the purpose) and surplus SMA relays will almost certainly have standard SMA connectors – which will not fit. Adapters from reverse to standard SMA are available on eBay or other suppliers – search for "RP-SMA to SMA adaptor" or similar wording.

==Antennas==

As 5.8GHz is used by broadband wireless networks, there is a wide choice of antennas available for use on 5.6GHz ATV. These can range from flat plates/panels to wire mesh (grid) dishes, as seen in the above pictures.

Horizontal polarisation has been chosen as the standard (waveguide feeds needs to have the long dimension of the aperture – and/or horn – vertically oriented when feeding dishes)

=== Satellite dishes ===

It is also possible to use a satellite mini dish with a suitable feed, such as a waveguide/horn to the design by G4NNS – see here for construction details: http://myweb.tiscali.co.uk/g4nns/FeedHorn.html

The picture shows a Sky mini dish fed with a WA5VJB log-periodic PCB feed http://www.wa5vjb.com/products1.html – these are available in the UK from G4DDK. http://www.g4ddk.com/Prices2.html

Dishes of this size typically have a beam width of 4—8 degrees.

[[File:56 dish feed.JPG|400px]]

M1BKF found a very interesting 5.6GHz feed for standard f/d ratio satellite dishes; it contains what looks like a PCB yagi, and was available from www.antennas-amplifiers.com:

[[File:PCB dish feed.JPG|200px]] [[File:PCB dish feed2.JPG|300px]]

=== DIY BiQuad antennae ===

This web page http://buildyourownantenna.blogspot.co.uk/2014/07/double-biquad-sector-antenna-for-5-ghz-wifi.html has a well engineered double BiQuad antenna with a quoted 13dBi gain.

Note in the picture G8JAN has directly connected the Tx module to the antenna to avoid co-ax losses.

[[File:feed.jpg|400px]]

==Video equipment - Rx==
The receiver output will need to be directly connected to a monitor with a composite video input to view the received the signal – normally on a yellow phono or RCA connector.

===Video squelch defeat===

Beware of using modern flat-screen monitors which have a video squelch – these will not display noisy signals, and just give a blue screen until they get a strong video signal.

There are a number of circuits around to defeat the squelch and also improve the readability of the signal.

===Syncsmurf by PE1RQM===
– kits are available; details on the [https://translate.google.com/translate?hl=auto&sl=auto&tl=en-US&u=https%3A%2F%2Fwww.pe1rqm.nl%2Fsyncsmurf2%2F webpage here].

[[File:syncsmurf1.jpg|200px]]

Results are very impressive:

[[File:syncsmurf2.jpg|400px]]

===eachine FPV recorder===

Several people have reported that they are using these devices, available from various sites, and as well as defeating the monitor blue screen by inserting syncs on noise they have a single push button record facility. They record to an SD card which can be removed and the files viewed on a PC; users report that you need to use a good quality SD card, and that they have had problems with Kingston branded cards – Sandisk are preferred.
The one issue with them is that they crop PAL signals removing 15% at the top and bottom of the picture. This is a hardware issue, so no amount of software updates will solve it. The workaround is that the unit will not crop PAL pictures if the video input is present when the unit is powered up. NTSC pictures are not affected

[[File:emachine dvr.JPG|300px]]

===Video sync processor===

[[File:cqtv 129.jpg|300px]]

Or any video sync processor may be usable such as the Advanced Converter Enhancer used by many stations on 23cms FM TV transmissions.

[[File:ACE.jpg|300px]]

==Receive Pre-amplifiers==

The basic drone recievers are fairly sensitive. However the perfomance can be improved by using a pre-amp before the unit but is also recommended that a bandpass filter included on the pre-amp output.

A cheap but high performance pre-amp can be made using the surplus LNA PCBs available from Franco in Italy https://www.rf-microwave.com/en/nbp/nmp/10-ghz-amplifier-24ghz-doubler/su-02/

These boards are fantastic value for money and can be used to make 10GHz pre-amps or the devices can be used to replace blown devices in most DB6NT transverters.

The following document shows the simple mods required to make a 5.6GHz pre-amp:

[[File:5.6GHz pre-amp.JPG|600px]]

The unit requires 5volts and minus volts for bias which can either be generated using the circuit on the main Franco PCB or the following circuit:

[[File:supply.jpg|600px]]

==Video equipment - Tx==
An old camcorder with a yellow phono "video out" socket is an ideal video and audio source for the transmitter.

Don't forget that you will need to display your call sign to remain legal. This can be a video generator, a .jpg card reader with video out, or a piece of card with your call sign scribbled on it!

===Media card reader===

A simple way to generate test patterns is to use a media card reader loaded with .jpg files – these are available on several sites, just search for "SD card media AV player" – but make sure you get one which outputs PAL video.

[[File:av player.JPG|200px]]

===PicDream===
The PicDream project uses a single PIC chip and a 4MHz crystal to generate a black and white test pattern – simple but effective – the original project was described in CQ-TV 180 and re-printed in CQ-TV 247.

[[File:Picdream 247.JPG|400px]]

The PIC code is available for download here: batc.org.uk/cq-tv/software/picdream.zip

===PicDream II===

[[File:picdream2.jpg|400px]]

The PicDream II project uses a PIC 24F16KA101 PIC chip and an AD724 PAL ecnoder chip to generate a colour test pattern with moving insets. The text and colours on the test pattern can be set through it's serial link.

Further information is at https://github.com/F1CJN/PICDREAM-II

===Raspberry Pi - PA3CHM image generator===

CQ-TV 247 published details of a simple RPi-based test card generator by Ernest PA3CHM.

[[File:PA3chm.JPG|400px]]

Full details are on his website: http://www.pa3hcm.nl/?p=248

===Raspberry Pi - Portsdown patterns===
The BATC Portsdown project can be configured to deliver composite video and audio out from the RPi multi-jack plug.

[[File:GKQ July 2017 (Small).JPG|400px]]

This can be test patterns, RPi desktop, or the Portsdown camera and microphone – [[Analog Video Output|see this wiki page for more details]] making the RPi the only piece of video/audio equipment you need to drive the 5.6GHz transmitter.

===Stand alone Raspberry Pi animated test card generator===
This is the stand alone version of the animated test card generator that is part of the Portsdown software
[[RPi Test Card| - see this wiki page for more details]]

==On the air==

Using dish aerials of 30—60cm, line of sight ranges of 80km can easily be achieved.

P5 (noise free) FM ATV pictures have been exchanged over a 138km path using the equipment described on this page – the picture below shows G4CPE/P on Dunstable Downs being received at the Ridgeway, near Didcot, over a slightly obstructed 66km path.

[[File:CPE 5.6GHz.JPG|400px]]

Dunkery Beacon near Minehead, to Cleeve Common near Cheltenham.
The picture shows G8GTZ/P received by G8GKQ/P over the 138km path.

[[File:snap5 small.jpg|400px]]

2018-04-21: The UK "record" for a contact using standard FPV units was increased to 153km between GW3NWR/P at Bylchau, North Wales to M0KPW/P and G0HIK/P at the Kirkstone Pass Inn, Cumbria.

This has since been surpassed.

==FM voice only==

Several stations in the Gloucester and Bolton area are using these units for wideband FM voice only. This is achieved by simply putting high level (1V peak-peak) audio on the yellow video TX phono input – this modulates the main high level carrier with audio rather than video (the two audio phono connectors – red and white – can be ignored). On RX, the yellow phono connector of the receiver is simply connected to a line level input of an audio amplifier.

It is done this way because the two audio subcarriers transmitted by the unit are at a level 20dB lower than that of the main (video)carrier. However, as it is using the same bandwidth Rx and Tx system, performance will be no better than FM video – ideally the 480MHz RX IF would be tapped off in to an SDR or narrow band receiver to give significantly enhanced (+20db?) narrow band performance.

==Activity hot spots==

There is a Google map showing approximate locations of stations thought to be active on 5.6GHz FM – if you are on 5.6GHz, you can add or edit your station: https://www.google.com/maps/d/u/0/edit?mid=1e4keFSFWy6wLUQNF3IT3n6h90eU&ll=52.39133141509076%2C-1.8917942000000494&z=7

Known users include:

*Southern England = G8GKQ, G8GTZ, G0UHY, G8XZD, G4UVZ, G3VPF
*Dunstable area = M0SKM, G4CPE, G0WFT
*North-East = GB3KM, G1LPS, M0DTS
*Cheltenham = G0LGS, M0RKX and G4NZV (using WB audio only)
*Bolton Wireless Club = G4JLG, G6GVI, G8PEF, M0UFC, MW1FGQ (PW “Siren” Article)
*Ludlow, Shropshire = G8XYJ
*Yorkshire = G8BYN
*Norfolk = G4NJJ, G8JAN, G4WVU and M1BKF
*Cumbria - Barrow-in-Furness Radio Club project
*Merseyside - G3NWR
*Northern Ireland = GI4DOH, GI3VAF, GI0GDP, GI7UGV

[[File:cpe2.jpg|400px]]

==More information==

Dave G8GKQ did a presentation at the BATC annual convention CAT17 in September 2017 on getting started on 5.6GHz ATV.
*The presentation is available here https://wiki.batc.org.uk/images/4/42/CAT17_5.6_GHzv2.pdf
*The video of the session is available on the BATC YouTube channel here https://www.youtube.com/watch?v=XJzGNsGmE9Y

==On line support / social media==

There is a thread running on the BATC forum where the ATV community are exchanging ideas and also posting results of the latest on air tests. https://forum.batc.org.uk/viewtopic.php?f=2&t=5026

Note that the BATC core team do not regularly visit Facebook pages - time is just too short to monitor everything and it's not easy to follow threads on Facebook.

==Technical information==

===SM201R===
The large RX chip in most units has had the part number removed, however it appears that a lot of receivers use the SM201R module. The spec and pinout are shown below but notice the frequency range of this particular unit does not seem to cover 5665MHz, so make sure the one you buy does!

[[File:sm201r 2.jpg|500px]] [[File:sm201r 3.JPG|200px]]

[[File:sm201r 1.JPG|500px]]

===S meter output===

Looking at the above table, it appears that the RSSI is available on pin 17 of the SM201R and could potentially be used for a signal strength meter to help align the antennas when setting up a QSO.

It also appears that the SM201R uses a 480MHz IF (same as the Comtech) and potentially could be modified with narrower filters to improve RF performance.

====Tx and Rx perfomance====

Initial measurements suggest the TX bandwidth is 25—30MHz.

[[File:5.6GHz spectrum.jpg|500px]]

This accounts for the quoted RX sensitivity at -80dBm which may be improved by an LNA but will ultimately be limited by the RX IF bandwidth.

===Channel Listings===

As mentioned above, the channel settings vary from manufacturer to manufacturer. This table is taken from the Tarot data sheet which uses the SM201R module but does include 5665MHz:

[[File:Tarot_Channels.jpg|603px]]

And this is the table for the Eachine TS835 transmitter:

[[File:Channels_2.jpg|619px]]

This table is from a "Fat Shark" transmitter that does not cover 5665 MHz:

[[File:Fat_Shark.PNG|300px]]

==Improvements to Commercial Units==

In CQ-TV 260, Achille I2GLI described improvements and additions to the Mateksys VTX-HV drone transmitter to make a high quality 18 watt output 5.6 GHz FM transmitter. One of the improvements was to replace the video and sound baseband circuitry. The published circuit diagram in online CQ-TV was a little unclear (although the printed version is good). The circuit diagram is reproduced below.
[[File:BandaBase.jpg|672px]]

5.6 GHz

2025-09-09T17:30:58Z

G4FRE: /* PicDream II */

[[File:5.6 GHz Orientation Small.jpg|300px|center]]
It is very easy (and low cost) to get on the air on 5.6GHz (the 6 cm amateur band), using the cheap modules intended to transmit “First Person Video” (FPV) back from drones to their operators. These units can be used without any modifications to get on air, and with simple WiFi plate or dish antennas (and a clear line of sight path) can be used to send pictures to stations using the same equipment over paths in excess of 50km.

M0KPW has an excellent website describing his 5.6GHz system http://www.5-6ghz-atv.co.uk/

==Frequency choice==

The overall UK amateur band plan is shown on the RSGB website here: https://rsgb.org/main/operating/band-plans/. As the UK amateur frequency allocation for 5 GHz is not contiguous spectrum, the RSGB has some [https://rsgb.org/main/operating/band-plans/microwaves/5-7-and-10ghz/ useful guidance] which is adapted below with arrow markers:-

[[File:bandplan.JPG|800px]]

GB3KM has a licensed input on 5665 MHz and this has been chosen as the primary ATV operating frequency. Audio WB-FM operators have been using 5825 and 5840 MHz. 5825 MHz is too close to the band edge for ATV, and 5840 MHz is marginal. So 5665 is the general ATV preference

The FPV equipment receive and transmit frequencies are set using DIP switches, and most tune to 5665 MHz – but care needs to be taken when selecting equipment to make sure it does cover this frequency. Example channel tables are shown at the bottom of this page.

==Equipment==

The FPV units are widely advertised on eBay and other sites with titles similar to “Tarot 5.8G 600MW Telemetry TX/RX Combo for FPV Image Transmission TL300N” and are available at reasonable prices. The typical units are very small but have reasonable FM-TV performance with a quoted transmitter spec of 600mW output and receiver sensitivity of -80dBm. Amplifiers are available to raise the output power to 2 watts or more.

[[File:Tairot 1.jpg|400px]]

Be aware – we have found that on some receiver units, the video output is on the Red phono lead and not the expected Yellow lead!

Some other users' stations are described here [[5.6 GHz Equipment Examples]].

===Mounting the equipment===
Due to the very high losses in co-ax cable at 5.6GHz it is recommended that you mount the units very close to the antennas and run long 12V dc, audio and video cables back down to the shack or operating position.

Be aware also, that whilst these units are very small they do run very hot in operation, and it is suggested that you provide a good heatsink for both Tx and Rx – mounting them in a diecast box on the back of their respective antennas is ideal.

[[File:GKQ 5.6v2.JPG|600px]]

Details of G8GKQ's transceiver setup is shown here (receiver unit on left & transmitter with fan on the right)

===Transmit amplifiers===

Whilst the basic units work very well and have been used to transmit over paths of 60km, power amplifiers to boost the 600mW transmitter signal to 2—4 Watts are available from several suppliers on eBay and other sites, and will significantly increase the path length that the units will work over. These amplifiers should be connected after the transmit unit, but before any antenna change over relay(s) – and remember that his will increase the volt drop on any long 12V cable feeding the transmitter at the masthead.

Be warned!! Several users have found these PAs to be "fragile", so you should always make sure that the antenna is connected – and all connectors done up tight – before applying dc or RF power. We are investigating whether they can be made more reliable by reducing the volts / input drive.

[[File:56PA.jpg|200px]]

==Antenna changeover relays==

The FPV equipment comes as separate Tx and Rx units. In order to operate on a single antenna, you will need an antenna changeover relay. Note, however, that the losses at 5.6GHz can be significant and care must be taken when wiring up the units to ensure RF cables are of good quality, and kept to a minimum length – semi-rigid cables fitted with SMA connectors are ideal.

PL259 and even BNC connectors are very lossy at 5.6GHz and should not be used, but the surplus SMA relays often available at rallys are ideal for 5.6 GHz.

See [[Antennae changeover relays|this wiki page]] for more details on suitable relays, 24 volt operation, and 4 port (or transfer) relays.

If no suitable relay is available, it may be cheaper to use separate antennas for receive and transmit as shown in the picture below – note the Tx and Rx units are mounted directly on the back of the flat panel antennas.

[[File:562.jpg|200px]]

===Reverse SMA===

Be aware that all the 5.6GHz FPV units use "reverse SMA" connectors (as used on WiFi equipment) and that all low-loss cables (unless bought specifically for the purpose) and surplus SMA relays will almost certainly have standard SMA connectors – which will not fit. Adapters from reverse to standard SMA are available on eBay or other suppliers – search for "RP-SMA to SMA adaptor" or similar wording.

==Antennas==

As 5.8GHz is used by broadband wireless networks, there is a wide choice of antennas available for use on 5.6GHz ATV. These can range from flat plates/panels to wire mesh (grid) dishes, as seen in the above pictures.

Horizontal polarisation has been chosen as the standard (waveguide feeds needs to have the long dimension of the aperture – and/or horn – vertically oriented when feeding dishes)

=== Satellite dishes ===

It is also possible to use a satellite mini dish with a suitable feed, such as a waveguide/horn to the design by G4NNS – see here for construction details: http://myweb.tiscali.co.uk/g4nns/FeedHorn.html

The picture shows a Sky mini dish fed with a WA5VJB log-periodic PCB feed http://www.wa5vjb.com/products1.html – these are available in the UK from G4DDK. http://www.g4ddk.com/Prices2.html

Dishes of this size typically have a beam width of 4—8 degrees.

[[File:56 dish feed.JPG|400px]]

M1BKF found a very interesting 5.6GHz feed for standard f/d ratio satellite dishes; it contains what looks like a PCB yagi, and was available from www.antennas-amplifiers.com:

[[File:PCB dish feed.JPG|200px]] [[File:PCB dish feed2.JPG|300px]]

=== DIY BiQuad antennae ===

This web page http://buildyourownantenna.blogspot.co.uk/2014/07/double-biquad-sector-antenna-for-5-ghz-wifi.html has a well engineered double BiQuad antenna with a quoted 13dBi gain.

Note in the picture G8JAN has directly connected the Tx module to the antenna to avoid co-ax losses.

[[File:feed.jpg|400px]]

==Video equipment - Rx==
The receiver output will need to be directly connected to a monitor with a composite video input to view the received the signal – normally on a yellow phono or RCA connector.

===Video squelch defeat===

Beware of using modern flat-screen monitors which have a video squelch – these will not display noisy signals, and just give a blue screen until they get a strong video signal.

There are a number of circuits around to defeat the squelch and also improve the readability of the signal.

===Syncsmurf by PE1RQM===
– kits are available; details on the [https://translate.google.com/translate?hl=auto&sl=auto&tl=en-US&u=https%3A%2F%2Fwww.pe1rqm.nl%2Fsyncsmurf2%2F webpage here].

[[File:syncsmurf1.jpg|200px]]

Results are very impressive:

[[File:syncsmurf2.jpg|400px]]

===eachine FPV recorder===

Several people have reported that they are using these devices, available from various sites, and as well as defeating the monitor blue screen by inserting syncs on noise they have a single push button record facility. They record to an SD card which can be removed and the files viewed on a PC; users report that you need to use a good quality SD card, and that they have had problems with Kingston branded cards – Sandisk are preferred.
The one issue with them is that they crop PAL signals removing 15% at the top and bottom of the picture. This is a hardware issue, so no amount of software updates will solve it. The workaround is that the unit will not crop PAL pictures if the video input is present when the unit is powered up. NTSC pictures are not affected

[[File:emachine dvr.JPG|300px]]

===Video sync processor===

[[File:cqtv 129.jpg|300px]]

Or any video sync processor may be usable such as the Advanced Converter Enhancer used by many stations on 23cms FM TV transmissions.

[[File:ACE.jpg|300px]]

==Receive Pre-amplifiers==

The basic drone recievers are fairly sensitive. However the perfomance can be improved by using a pre-amp before the unit but is also recommended that a bandpass filter included on the pre-amp output.

A cheap but high performance pre-amp can be made using the surplus LNA PCBs available from Franco in Italy https://www.rf-microwave.com/en/nbp/nmp/10-ghz-amplifier-24ghz-doubler/su-02/

These boards are fantastic value for money and can be used to make 10GHz pre-amps or the devices can be used to replace blown devices in most DB6NT transverters.

The following document shows the simple mods required to make a 5.6GHz pre-amp:

[[File:5.6GHz pre-amp.JPG|600px]]

The unit requires 5volts and minus volts for bias which can either be generated using the circuit on the main Franco PCB or the following circuit:

[[File:supply.jpg|600px]]

==Video equipment - Tx==
An old camcorder with a yellow phono "video out" socket is an ideal video and audio source for the transmitter.

Don't forget that you will need to display your call sign to remain legal. This can be a video generator, a .jpg card reader with video out, or a piece of card with your call sign scribbled on it!

===Media card reader===

A simple way to generate test patterns is to use a media card reader loaded with .jpg files – these are available on several sites, just search for "SD card media AV player" – but make sure you get one which outputs PAL video.

[[File:av player.JPG|200px]]

===PicDream===
The PicDream project uses a single PIC chip and a 4MHz crystal to generate a black and white test pattern – simple but effective – the original project was described in CQ-TV 180 and re-printed in CQ-TV 247.

[[File:Picdream 247.JPG|400px]]

The PIC code is available for download here: batc.org.uk/cq-tv/software/picdream.zip

===PicDream II===

[[File:picdream2.jpg|400px]]

The PicDream II project uses a PIC24F16KA101 PIC chip and an AD724 PAL ecnoder chip to generate a colour test pattern with moving insets. The text and colours on the test pattern can be set through it's serial link.

Further information is at https://github.com/F1CJN/PICDREAM-II

===Raspberry Pi - PA3CHM image generator===

CQ-TV 247 published details of a simple RPi-based test card generator by Ernest PA3CHM.

[[File:PA3chm.JPG|400px]]

Full details are on his website: http://www.pa3hcm.nl/?p=248

===Raspberry Pi - Portsdown patterns===
The BATC Portsdown project can be configured to deliver composite video and audio out from the RPi multi-jack plug.

[[File:GKQ July 2017 (Small).JPG|400px]]

This can be test patterns, RPi desktop, or the Portsdown camera and microphone – [[Analog Video Output|see this wiki page for more details]] making the RPi the only piece of video/audio equipment you need to drive the 5.6GHz transmitter.

===Stand alone Raspberry Pi animated test card generator===
This is the stand alone version of the animated test card generator that is part of the Portsdown software
[[RPi Test Card| - see this wiki page for more details]]

==On the air==

Using dish aerials of 30—60cm, line of sight ranges of 80km can easily be achieved.

P5 (noise free) FM ATV pictures have been exchanged over a 138km path using the equipment described on this page – the picture below shows G4CPE/P on Dunstable Downs being received at the Ridgeway, near Didcot, over a slightly obstructed 66km path.

[[File:CPE 5.6GHz.JPG|400px]]

Dunkery Beacon near Minehead, to Cleeve Common near Cheltenham.
The picture shows G8GTZ/P received by G8GKQ/P over the 138km path.

[[File:snap5 small.jpg|400px]]

2018-04-21: The UK "record" for a contact using standard FPV units was increased to 153km between GW3NWR/P at Bylchau, North Wales to M0KPW/P and G0HIK/P at the Kirkstone Pass Inn, Cumbria.

This has since been surpassed.

==FM voice only==

Several stations in the Gloucester and Bolton area are using these units for wideband FM voice only. This is achieved by simply putting high level (1V peak-peak) audio on the yellow video TX phono input – this modulates the main high level carrier with audio rather than video (the two audio phono connectors – red and white – can be ignored). On RX, the yellow phono connector of the receiver is simply connected to a line level input of an audio amplifier.

It is done this way because the two audio subcarriers transmitted by the unit are at a level 20dB lower than that of the main (video)carrier. However, as it is using the same bandwidth Rx and Tx system, performance will be no better than FM video – ideally the 480MHz RX IF would be tapped off in to an SDR or narrow band receiver to give significantly enhanced (+20db?) narrow band performance.

==Activity hot spots==

There is a Google map showing approximate locations of stations thought to be active on 5.6GHz FM – if you are on 5.6GHz, you can add or edit your station: https://www.google.com/maps/d/u/0/edit?mid=1e4keFSFWy6wLUQNF3IT3n6h90eU&ll=52.39133141509076%2C-1.8917942000000494&z=7

Known users include:

*Southern England = G8GKQ, G8GTZ, G0UHY, G8XZD, G4UVZ, G3VPF
*Dunstable area = M0SKM, G4CPE, G0WFT
*North-East = GB3KM, G1LPS, M0DTS
*Cheltenham = G0LGS, M0RKX and G4NZV (using WB audio only)
*Bolton Wireless Club = G4JLG, G6GVI, G8PEF, M0UFC, MW1FGQ (PW “Siren” Article)
*Ludlow, Shropshire = G8XYJ
*Yorkshire = G8BYN
*Norfolk = G4NJJ, G8JAN, G4WVU and M1BKF
*Cumbria - Barrow-in-Furness Radio Club project
*Merseyside - G3NWR
*Northern Ireland = GI4DOH, GI3VAF, GI0GDP, GI7UGV

[[File:cpe2.jpg|400px]]

==More information==

Dave G8GKQ did a presentation at the BATC annual convention CAT17 in September 2017 on getting started on 5.6GHz ATV.
*The presentation is available here https://wiki.batc.org.uk/images/4/42/CAT17_5.6_GHzv2.pdf
*The video of the session is available on the BATC YouTube channel here https://www.youtube.com/watch?v=XJzGNsGmE9Y

==On line support / social media==

There is a thread running on the BATC forum where the ATV community are exchanging ideas and also posting results of the latest on air tests. https://forum.batc.org.uk/viewtopic.php?f=2&t=5026

Note that the BATC core team do not regularly visit Facebook pages - time is just too short to monitor everything and it's not easy to follow threads on Facebook.

==Technical information==

===SM201R===
The large RX chip in most units has had the part number removed, however it appears that a lot of receivers use the SM201R module. The spec and pinout are shown below but notice the frequency range of this particular unit does not seem to cover 5665MHz, so make sure the one you buy does!

[[File:sm201r 2.jpg|500px]] [[File:sm201r 3.JPG|200px]]

[[File:sm201r 1.JPG|500px]]

===S meter output===

Looking at the above table, it appears that the RSSI is available on pin 17 of the SM201R and could potentially be used for a signal strength meter to help align the antennas when setting up a QSO.

It also appears that the SM201R uses a 480MHz IF (same as the Comtech) and potentially could be modified with narrower filters to improve RF performance.

====Tx and Rx perfomance====

Initial measurements suggest the TX bandwidth is 25—30MHz.

[[File:5.6GHz spectrum.jpg|500px]]

This accounts for the quoted RX sensitivity at -80dBm which may be improved by an LNA but will ultimately be limited by the RX IF bandwidth.

===Channel Listings===

As mentioned above, the channel settings vary from manufacturer to manufacturer. This table is taken from the Tarot data sheet which uses the SM201R module but does include 5665MHz:

[[File:Tarot_Channels.jpg|603px]]

And this is the table for the Eachine TS835 transmitter:

[[File:Channels_2.jpg|619px]]

This table is from a "Fat Shark" transmitter that does not cover 5665 MHz:

[[File:Fat_Shark.PNG|300px]]

==Improvements to Commercial Units==

In CQ-TV 260, Achille I2GLI described improvements and additions to the Mateksys VTX-HV drone transmitter to make a high quality 18 watt output 5.6 GHz FM transmitter. One of the improvements was to replace the video and sound baseband circuitry. The published circuit diagram in online CQ-TV was a little unclear (although the printed version is good). The circuit diagram is reproduced below.
[[File:BandaBase.jpg|672px]]

Knucker

2025-04-29T19:30:00Z

G4FRE: /* Receiver */

The Knucker project is to develop a reduced-bandwidth DVB-T USB receiver and transmitter for use on the lower VHF bands and HF. It will also have applications for mobile stations on 437MHz and above. '''The Knucker is not intended to be capable of receiving commercial broadcast TV transmissions.'''

==Why DVB-T==

DX!!

DVB-T can be used in environments where phase distortion and multi-pathing means DVB-S does not work. Typical applications include mobile video transmissions and bands below 70MHz :-)

We don't need DVB-T except for 29 / 50 MHz and mobile - it won't replace DVB-S for other bands and QO100!

==Why Knucker==

Why not?

Knucker is a dialect word for a kind of water dragon, living in knuckerholes in Sussex and Charles, the lead developer, also lives in Sussex....

https://en.wikipedia.org/wiki/Knucker

[[File:knucker dragon.jpg|200px]]

==Timescales==

The PCBs and Tuners went on general relase in March 2021. The receive software is included in the Portsdon 4 build from that date.

Interim receive software has also been included in the Ryde build (accessed through the SSH Console Menu).

==Receiver==

The Knucker may be used as a DVB-T receiver in conjunction with the Portsdown 4 or Ryde receiver. In Ryde, the DVB-T option is selected by either selecting a DVB-T Band or Preset using the remote control. It can also be accessed from the ssh console menu.

==Hardware==
Charles G4GUO and the Knucker team have developed a variable bandwidth DVB-T receiver with USB interface around the Serit 4762 NIM / tuner.

Specifications are 150 kHz to 2 MHz wide OFDM, frequency range 44 to 1002MHz. The receiver software is included in the Portsdown 4 (touchscreen) and the Ryde.

Note: the 4762 NIM is capable of DVB-T and DVB-S but the '''DVB-S is NOT (repeat NOT) supported in any BATC applications''' due to restricted frequency range and lack of low SR capability.

The PCB design by Mike G0MJW is based on the MiniTiouner Version 2 board.

'''Note that the DVB-T input to the NIM is the bottom F type nearest the PCB.'''

====Version 1====

Feasibility design which was never built.

====Version 2====

[[File:Knucker assembled V1 PCB.jpg|200px]]

This was the first prototype build and not on general release. The old BOM and schematics are available here, '''but do not use them unless you are sure that you have an old board, and not the one that has been on sale since January 2021:''' [[File:Knucker.xlsx]]

====Version 3====

First general release PCB - released March 2021

[[File:render.jpg|400px]]

[[File:Knucker PCB.jpg|200px|PCB Image]]

'''Note 1 - the use of a 3 pin 1.2v regulator which is different from the 5 pin variable 1.2v regulator on the MiniTuioner V2 PCB'''

'''Note 2 - Use the F type nearest the PCB for DVB-T reception'''

Schematic is here: [[:media:Knucker schematic V3.pdf]]

BOM is here [[:media:knucker BOM V3.xlsx]]

====USB Module====

The USB module will require reprogramming with the xml file in this zip using the FTDI program called FT Prog - the standard MiniTiouner USB module from the BATC will not work but can be re-programmed as follows:

Download and install the FTDI FTprog software from here:

Download, unzip and save this file [[:File:combituner.zip]] It will save as Knucker DVBT.xml

Put the USB module in to the PCB, apply power to the Knucker board, and connect the USB port to the PC - you should here the Windows bing bong sound. '''Note that to program the module in a Knucker PCB, power must be applied to the PCB (unlike the MiniTiouner)'''.

Run FTprog:

[[File:ftprog1.JPG|400px]]

Go - File>open template and open the .xml file

Go - Devices>Scan and parse

Your screen should now look like this:

[[File:ftprog2.JPG|400px]]

Right click on the "Device:0" line

Apply template - select the template you have opened.

Right click again - Program Device

Go - Devices>Scan and parse and it should show your device as programmed.

Full instructions on how to program the unit are here: http://www.vivadatv.org/viewtopic.php?f=80&t=379. After reprogramming confirm you have been succesful by doing a "scan and parse" action and ensuring that ProductDesc is shown as 'CombiTuner-Express'

==Software==

Charles G4GUO has developed a core Linux DVB-T receiver application using information provided under a non-disclosure-agreement from the manufacturerm, so only the compiled binary (for a Raspberry Pi) is available for download.

===Portsdown===

The receive software has been integrated into the Portsdown 4 system to give a narrow band DVB-T receive capability. https://forum.batc.org.uk/viewtopic.php?f=103&t=7158

===Ryde set top box===

The Ryde Set Top box also works with the Knucker receive board to receive DVB-T signals.

==Transmit==

===Portsdown system===

Due to excellent cooperation between Charles and Dave, a Portsdown DVB-T transmitter using the Pluto SDR has been integrated into the Portsdown 4.

The first official release was made on 1st February 2021

https://forum.batc.org.uk/viewtopic.php?t=7158&p=26210#p26210

Both the Portsdown 2020 and the Portsdown 4 have an H264 DVB-T transmit capability when used with the LimeSDR Mini.

===DATV Express===

Charles G4GUO has developed a variable bandwidth OFDM version of the DATVexpress software. Version 1.25lp17 works for DVB-T with the DATV Express card.

It does work in some configurations with the Pluto (and possibly the LimeSDR) but these SDRs are not yet properly supported.

For initial testing, set the DATV Express to use Mono MPA audio and DVB-T using the settings shown below.

[[File:DATV Express Settings.PNG|471px]]

Portsdown 4

2025-04-29T19:24:58Z

G4FRE: /* FAQ */

The Portsdown 4 transceiver software has been specifically designed to be used with the Raspberry Pi 4 and the official Raspberry Pi 7 inch touchscreen. It will drive a Pluto SDR or the LimeSDR.

Portsdown 4 is the simplest and easiest to construct, with a barebones system consisting of:

* Raspberry Pi4 2GB model
* 7" touch screen
* 8, 16 or 32 GB SD card
* Adalm Pluto '''or''' Lime SDRmini SDR hardware

This will give you a DVB-S2 and DVB-T DATV transmit system from 30 to 3500 MHz when using a Lime SDR and 50MHz to 4100 MHz with the Pluto.

With the addition of a MiniTiouner USB receiver [[https://wiki.batc.org.uk/MiniTioune]], you will have a full spec DVB-S/S2 DATV transceiver.

With the addition of the [[Knucker|Knucker USB tuner]] you will also have DVB-T receive capabilities.

==Building a Portsdown 4==

Dave G8GKQ published this step by step guide to building a Portsdown 4 in CQ-TV 271:

[[:media:Getting Started With Portsdown 4.pdf]]

==Capabilities==

===Portsdown 4 transmit capabilities:===
* DVB-S, DVB-S2 and DVB-T (H264 only) transmissions from a Pluto SDR connected by USB. More details [[Portsdown_4_Pluto|here]].
* DVB-S, DVB-S2 and DVB-T (MPEG-2 and H264) transmissions from a LimeSDR Mini or LimeSDR USB using stock LimeSDR firmware
* DVB-S and DVB-S2 (MPEG-2 and H264) transmissions from a LimeSDR Mini using "LimeDVB" firmware
* DVB-S (MPEG-2 and H264) transmissions from a DATV Express Board connected by USB
* Supported transmit video sources include the Raspberry Pi Camera, C920 WebCam or a USB-connected EasyCap composite video capture device
* Streaming to the BATC Streamer using the Raspberry Pi Camera or EasyCap composite video capture device as a source

===Portsdown 4 receive capabilities:===
When a [[MiniTioune|MiniTiouner USB receiver]] is connected via USB:
* Reception and display of DVB-S and DVB-S2 (MPEG-2, H264 and H265) signals - see [[DVB-S/S2 Reception|https://wiki.batc.org.uk/DVB-S/S2_Reception]]

When a [[Knucker|BATC Knucker USB tuner]] is connected by USB:
* Reception and display of DVB-T and DVB-T2 (MPEG-2, H264 and H265) signals

When the Portsdown 4 is connected to the internet:
* Display of streams from the BATC Streamer

Received audio can be heard through either the Raspberry Pi AV socket or a compatible USB audio dongle.

===Portsdown 4 test and alignment aids===

* Control of a Pluto, LimeSDR Mini, DATV Express, ADF4351, Elcom and SLO Microwave Sources using the [[Portsdown 4 Signal Generator]].

* Basic spectrum display of band occupancy using the "[[Portsdown Band Viewer]]" - '''note this requires a LimeSDR Mini to be connected'''.

==Hardware==

[[File:Portsdown 4 Block.PNG|600px]]

Only the Raspberry Pi 4 and the Official 7 inch touchscreen (or the DFRobot DFR0550 5 inch touchscreen) are planned to be supported in the near future.

===Portsdown 4 GPIO connections===

Due to a reassignment of the GPIO pins on Raspberry Pi4, the connections are different to previous generations of Portsdown.

The Portsdown 4 GPIO Connections are defined here: [[Portsdown 4 GPIO Connections]].

===Powering the LimeSDR===

The Raspberry Pi 4 has increased power capabilities on its USB ports, so it is recommended that you connect the LimeSDR directly to the Raspberry Pi. For some reason, the LimeSDR Mini sometimes works better when connected to the USB2 ports (the black ones, not the blue ones).

===Powering the Pluto===

The Raspberry Pi 4 has increased power capabilities on its USB ports, and the Pluto does not work well with USB Hubs, so it is recommended that you connect the Pluto directly to a USB3 port (the blue ones) on the Raspberry Pi 4. Do not use a USB hub or power the Pluto from its USB power port.

The Pluto is more reliable and less likely to drop out if fed with about 4.9v on USB. So, set the RPi input voltage to 5.0v, or use another power source to make sure that the Pluto is not fed with over 5.0v.

If powering the Pluto using the USB lead from the Pi you may have USB instability issues if the Pluto receives over 5V. As the Pi prefers voltages around 5.1-5.2V this can cause problems. One way around this is to carefully cut into the USB lead and add a Schottky diode (e.g. 1N5817) in series with the positive conductor. With a supply voltage of 5.15V to the Pi the Pluto receives 4.85V and both work correctly.

===Portsdown hardware===

Full details of the Portsdown hardware [[Portsdown hardware|are available here]].

==Software==

The Portsdown 4 software is available on a pre-programmed SD card which you can buy from the BATC shop https://batc.org.uk/shop/portsdown-transmitter-pre-programmed-sd-card/

If you wish to build your own card the build is on GitHub at https://github.com/BritishAmateurTelevisionClub/portsdown4

==Langstone Narrow Band Transceiver==

The Portsdown 4 software build is also compatible with the Langstone Microwave transceiver software, which can be loaded from touchscreen selections (menu 2) AFTER the Portsdown software has been installed.

See https://wiki.microwavers.org.uk/Langstone_Project for more details and the full spec of the Langstone.

Note: the Langstone software needs a '''Pluto SDR''' to be connected by USB, and a compatible USB Audio dongle.

==Pluto Capabilities==

The Portsdown 4 support for the Pluto SDR is still under development and there are some limitations on functionality as described here [[Portsdown 4 Pluto]].

==FAQ==

* Is it possible to rotate the PiCam image in software as it is on it's side?
No - you need to do the camera mounting modification which Colin G4KLB described in CQ-TV 267

* Can I upgrade from Langstone or a previous version including Portsdown A27?
No - you must start with a clean image on your SD card

* When I try to update I get the error "Unable to contact GitHub for update, Internet connection to Google seems OK". The solution is to log in by ssh and run the following commands:

cd /home/pi
wget https://raw.githubusercontent.com/BritishAmateurTelevisionClub/portsdown4/master/update.sh -O /home/pi/update.sh
chmod +x /home/pi/update.sh
./update.sh

* I have built my Portsdown 4 but the screen is upside down. How can I get it the right way up?

Menu 3, System Config, Invert 7 inch

==More information==

For more information and to ask any questions see https://forum.batc.org.uk/viewtopic.php?f=103&t=6804

UK ATV DX Records

2024-11-29T10:33:01Z

G4FRE: /* 6cms (5.6GHz) */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 136.8 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 136.8 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136.8 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-11-29T10:32:39Z

G4FRE: /* 9cms (3.4GHz) */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136.8 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-11-29T10:31:55Z

G4FRE: /* 3cms (10GHz) */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 138 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136.8 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-11-29T10:30:15Z

G4FRE: /* 9cms (3.4GHz) */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 138 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-11-29T10:29:59Z

G4FRE: /* 9cms (3.4GHz) */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 138 kms|| G8GTZ/P || IO81FD Dunkerry Beacon || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-11-29T10:29:21Z

G4FRE: /* 9cms (3.4GHz) */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkerry Beacon || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-06-13T20:34:39Z

G4FRE: /* 47GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-06-13T20:33:53Z

G4FRE: /* 47GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-06-13T20:33:34Z

G4FRE: /* 47GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-06-13T20:32:54Z

G4FRE: /* 76GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI44 - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-06-13T20:32:13Z

G4FRE: /* 76GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV82 - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-06-13T20:28:57Z

G4FRE: /* 76GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-06-13T20:28:29Z

G4FRE: /* 76GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61 - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2024-06-13T20:28:03Z

G4FRE: /* 76GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the list of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2023.pdf
<be>

Lex PE1CVJ and Rob MØDTS/p set a world record 1.2 GHz DATV record during the IARU ATV contest on June 10, 2023.
* 1.2 GHz record between the Netherlands and UK (454 KM) using a short opening of tropospheric reflections over the North Sea.

Rob PE1ITE traveled to a series of locations in France/Germany/Switzerland to conduct DATV QSOs during May 18-21 2023 on 146 MHz
Two new world records were added in May 2023.
* 144 MHz record on May 20 2023 with PI6GN in the Netherlands (695 KM) using "airplane-scatter".
* another 144 MHz record on May 19 2023 with ON7MOR in Belgium (418 KM) using "airplane-scatter".

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||
|}

World record = 186 km IW9ARO in Sicily to 9H1GB in Malta. April 2023 http://www.hb9afo.ch/records/default.htm#24_GHz

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61AQ - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks||
|-
| 05-06-2024 || 52.1 kms || G4FRE/P || IO91GI61AQ - Combe Mast || G8GTZ/P || IO90MX13 - Butser || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

BATC Wiki

2024-06-04T21:47:49Z

G4FRE: /* Test equipment Information */

'''Welcome to the British Amateur Television Club Wiki''' - the place to find information on all Amateur Television related equipment and projects. For details on how to join the BATC, the member's shop and CQ-TV archive and download visit the BATC website https://batc.org.uk/

This is your site, developed by the BATC for use by the worldwide ATV community - any information which you feel is of use to others can be put on the Wiki but please observe any copyright restrictions on the material you use.

* New to Amateur TV - Get the basics on our [[Getting Started|Getting Started page]]

* For details on the Portsdown DATV transmit and receive system go to [[The Portsdown DATV transceiver system|the Portsdown pages]]

* For information on the MiniTiouner USB DATV receiver go to [[MiniTioune|MiniTiouner]]

* For the DATV equipment capability list go to [[DATV equipment capability|https://wiki.batc.org.uk/DATV_equipment_capability]]

== Contents ==
* [[Registering]] on the BATC wiki

== New to Amateur TV? ==
* Get the basics on our [[Getting Started|Getting Started page]]

==BATC Information and services==
* [[Joining the BATC]]

* [[Renewing your membership]]

* The [[BATC Privacy statement and data protection policy]]

* The [[BATC forum]]

* The [[BATC shop]]

* The [[The_new_streamer|BATC streamer]]

* The [[BATC archive]] Collection of photos and documents from BATC's past

* The [[new BATC website|BATC website]]

== BATC projects ==
* [[The Portsdown Transmitter]] - the BATC's Raspberry Pi-based DATV Transmitter
* [[MiniTioune]] - the DATV DVB-S / S2 receiver project
* [[Ryde Receiver]] - Dedicated DATV set top box project
* [[Knucker]] - Variable bandwidth DVB-T project
* [[Advanced receiver hardware]] - Details of the BATC advanced receiver hardware.
* [[WinterHill Receiver Project]] - Multi-channel DVB-S / S2 project
* [[BATC Video Source]] - The Raspberry Pi-based composite video source described in CQ-TV 270
* [[BATC HDMI Source]] - The Raspberry Pi-based HDMI video source to be described in CQ-TV 280
* [[Digilite]] - The original home build DATV construction project
* [[Repeater Controller]] - The BATC ATV Repeater Controller using a Raspberry Pi 4
* [[ARISS Digital Communication System]]
* [[PicoTuner]] - A USB tuner for DATV using the RpiPico as the USB interface

== CQ-TV Magazine ==
* [[Index of articles]]
* [[Archive edition|Archive editions]] download
* [[BATC_Software_Library]] for project downloads

==BATC Event Streaming Equipment==
* [[Equipment Description]]

== BATC Conventions ==

Presentations from previous conventions can be found on this page [[BATC Conventions]]

==National and International Events==

* [[ HAM RADIO 2018 ]] ATV Presentations from HAM RADIO 2018 at Friedrichhsafen.

* [[ HAM RADIO 2019 ]] ATV Presentations from HAM RADIO 2019 at Friedrichshafen.

* [[ HAM RADIO 2022 ]] ATV Presentations from HAM RADIO 2022 at Friedrichshafen.

* [[ RSGB Convention 2022 ]] ATV Presentation at the 2022 RSGB Convention 2022

* [[ HAM RADIO 2023 ]] ATV Presentations from HAM RADIO 2023 at Friedrichshafen.

* [[ EMFcamp 2024 ]] BATC / AMSAT-UK / UKuG demonstration village at EMFcamp 2024.

==HAMTV on the ISS==
[[HAMTV from the ISS]]

== Getting on the air with ATV ==
===The ATV bands===
* [[29 MHz]]
* [[51 MHz]]
* [[71 MHz]]
* [[146 MHz RB-TV]]
* [[70cms Analogue TV]]
* [[70cm DATV]]
* [[23cms ATV]]
* [[13cms]]
* [[3.4 GHz DATV]]
* [[5.6 GHz]]
* [[10 GHz]]
* [[:Media:ATV on 5.6 10 and 24 Ghz.pdf|April 2018 Presentation to MMRT about ATV on 5.6 10 and 24 GHz]]

===The different ATV modes===
* [[Reduced bandwidth TV]] (RB-TV)
* [[The Effect of FEC]]

===Equipment Options===
* [[DATV transmitting Equipment]]

==Advanced encoding / input options==

Details of advanced transmission configurations, primarily for H265,and video production software.

* [[Feeding Video to Portsdown from vMix|Vmix output in to Portsdown IPTS input]]
* [[OBS - Open Broadcast Studio|OBS output in to Portsdown IPTS input]]
* [[Using GTX10xx Graphics card encoder with OBS]]
* [[Custom_DATV_Firmware_for_the_Pluto|Using the Pluto for DATV]]
* [[Jetson_Nano|Using the Jetson Nano with Portsdown]]

== Operating ==
* [[DATV equipment capability]] - Wiki page documenting the capabilities of common DATV transmit and receive equipment.
* [[ATV standards]] - a list of standards used by ATV operators including FM bandwidths, DATV PIDs, symbol rates and FEC
* [[EMF Compliance]] - information about EMF compliance for ATV and Microwave Operation
* [[Directory of portable sites]] suitable for ATV and microwave operation
* [https://www.google.com/maps/d/u/0/edit?mid=1VeLnRRbLwloDTL2i9-HE2sxqL0c&ll=52.95536632179757%2C-0.49709419999999227&z=7 Google map] showing possible portable operating sites
* [[Mapping tools]] including finding the QRA locator of a site, UK postcode to Lat and Long conversion and a topographic overlay for Google maps
* [[Propagation tools]]
* [[UK ATV DX Records]] - a list of Known DX Records for the UK
* [[2022 Activity Weekends]]
* [[2023 BATC Activity Weekends & Contests]]
* [[Christmas 2022 Repeater Contest & Activity Challenge]]
* [[Christmas 2023 Repeater Contest & Activity Challenge]]
* [[2023 6cm Activity Ladder]]
* [[IARU ATV contest]] - How to enter the annual international TV contest
* [[IARU ATV contest 2023 International Results]] - International Results for the June 2023 IARU Contest
* [[IARU ATV contest 2022 International Results]] - International Results for the June 2022 IARU Contest
* [[IARU ATV contest 2021 International Results]] - International Results for the June 2021 IARU Contest
* [[IARU ATV contest 2020 International Results]] - International Results for the June 2020 IARU Contest
* [[IARU ATV contest 2019 International Results]] - International Results for the June 2019 IARU Contest
* [[IARU ATV contest 2018 Results]] - UK Results for the June 2018 IARU and BATC Contests
* [[IARU ATV contest 2018 International Results]] - International Results for the June 2018 IARU Contest
* [[September 2019 BATC Low Band Contest]]

==ATV repeaters==
* [[UK ATV repeaters]]
* [[USA ATV repeaters]]
* [[Australian TV repeaters]]

* [[Technical topics for ATV repeater builders]]

==Es'hail-2==
* [[Es'hail-2 Basic Information|Getting started, LNBs and aligning a dish]]

* [[Es'hail-2 Ground Station|Es'hail-2 BATC WebSDR & DATV Spectrum Monitor]]

* [[Es'hail-2 DATV Bandplan]]

* [[Es'hail-2_LNBs_and_Antennaes|Es'hail-2_LNBs]]

* [[Transmitting_Oscar_100_DATV_signals|Es'hail-2 Transmitters]]

* [[Es'hail-2 Antennaes]]

* [[Es'hail-2 conference transmissions]]

==ATV projects==
* [[Adalm Pluto]] - Collection of information on using the Adalm Pluto for DATV
* [[The MacGuffin Project]] - Collection of tools used to create an automated multi-band ATV system
* [[Receiver upconverters]] - Details of upconverters to receive 146 and 437 MHz on STB and MiniTioune
* [[Jetson Nano]] - Third generation computer-based DATV Transmitter
* [[DTX1 TS]] - interface board to take in TS streams to the DTX1
* [[RpiDATV]] - software for the Rpi
* [[RBTVMOD]] - variable rate RB-TV mdulator for the Rpi
* [[DATVExpress]] - SDR hardware based DATV transmitter covering 70 - 2450 MHz
* [[PE4302]] - PE4302 variable attenuator project
* [[ADF435x PIC]] - PIC controllers for Chinese ADF4350/4351 boards
* [[DigiTwist]] - an experimental 2 axis satellite tracker
* [[G4WIM PA controller]] - an advanced PA controller design by G4WIM published in CQ-TV 265
* [[WinterHill Receiver Project]]
* [[Tilt-O-Matic]] Pan and tilt head for surveyor tripods
* [[Gerber Files]] Index of Gerber (PCB) files used by BATC and Members' Projects

== Deutschsprachiges Wiki ==

* Portsdown DATV Projekt - Deutschsprachiges Wiki
* Minitioune(r) - Deutschsprachiges Wiki

== Useful Circuits and notes ==
* [[Antenna changeover relays]] - Notes on suitable antenna change over relays for ATV use.
* [[Filters]] - Collection of links and designs for that most critical but over looked component!
* [[Pre-amps]] - Notes, suppliers and circuits of pre-amplifiers suitable for ATV
* [[Power amplifiers]] - Notes, suppliers and circuits of power amplifiers suitable for ATV
* [[Video circuits]] - Notes and circuits for video processing
* [[Satellite receiver tuning offsets]] - Note on how to set up a satellite receiver to directly receive L band signals.
* [[Using ex-satellite dishes]] - Notes on how to find the feed point of a dish and designs for feeds to use

== ATV Equipment manuals and schematics ==
* [[Bob Platts G8OZP]] Circuits and documentation for the Bob Platts range of equipment
* [[Comtech module]] - 23cms and 13cms ATV Tx and Rx circuits and guides
* [[Solent ATV units]] - Tx and Rx circuits and information
* [[Wood & Douglas FM TV equipment]] - Circuits, pcb layouts and information
* [[LMW Electronics]] - Circuits, pcb layouts and information
* [[Fortop]] - Circuits, pcb layouts and information
* [[Glencom]] - VC-510 VHF to L band up converter circuit diagram and modifications
* [[Global communications]] - Hand drawn circuit of tuneable 70 / 140 MHz to L band block up converter
* [[Jaybeam]] - Details of many Jaybeam aerials

== Ex commercial broadcast equipment manuals ==
* [[NDS System 3000]]
* [[NDS Alteia rx]]

== Test equipment Information ==
For HP and Agilent equipment see the io group discussion at [https://groups.io/g/HP-Agilent-Keysight-equipment]

== Other equipment information related to ATV ==

BATC Wiki

2024-06-04T21:47:21Z

G4FRE: /* Test equipment manuals */

'''Welcome to the British Amateur Television Club Wiki''' - the place to find information on all Amateur Television related equipment and projects. For details on how to join the BATC, the member's shop and CQ-TV archive and download visit the BATC website https://batc.org.uk/

This is your site, developed by the BATC for use by the worldwide ATV community - any information which you feel is of use to others can be put on the Wiki but please observe any copyright restrictions on the material you use.

* New to Amateur TV - Get the basics on our [[Getting Started|Getting Started page]]

* For details on the Portsdown DATV transmit and receive system go to [[The Portsdown DATV transceiver system|the Portsdown pages]]

* For information on the MiniTiouner USB DATV receiver go to [[MiniTioune|MiniTiouner]]

* For the DATV equipment capability list go to [[DATV equipment capability|https://wiki.batc.org.uk/DATV_equipment_capability]]

== Contents ==
* [[Registering]] on the BATC wiki

== New to Amateur TV? ==
* Get the basics on our [[Getting Started|Getting Started page]]

==BATC Information and services==
* [[Joining the BATC]]

* [[Renewing your membership]]

* The [[BATC Privacy statement and data protection policy]]

* The [[BATC forum]]

* The [[BATC shop]]

* The [[The_new_streamer|BATC streamer]]

* The [[BATC archive]] Collection of photos and documents from BATC's past

* The [[new BATC website|BATC website]]

== BATC projects ==
* [[The Portsdown Transmitter]] - the BATC's Raspberry Pi-based DATV Transmitter
* [[MiniTioune]] - the DATV DVB-S / S2 receiver project
* [[Ryde Receiver]] - Dedicated DATV set top box project
* [[Knucker]] - Variable bandwidth DVB-T project
* [[Advanced receiver hardware]] - Details of the BATC advanced receiver hardware.
* [[WinterHill Receiver Project]] - Multi-channel DVB-S / S2 project
* [[BATC Video Source]] - The Raspberry Pi-based composite video source described in CQ-TV 270
* [[BATC HDMI Source]] - The Raspberry Pi-based HDMI video source to be described in CQ-TV 280
* [[Digilite]] - The original home build DATV construction project
* [[Repeater Controller]] - The BATC ATV Repeater Controller using a Raspberry Pi 4
* [[ARISS Digital Communication System]]
* [[PicoTuner]] - A USB tuner for DATV using the RpiPico as the USB interface

== CQ-TV Magazine ==
* [[Index of articles]]
* [[Archive edition|Archive editions]] download
* [[BATC_Software_Library]] for project downloads

==BATC Event Streaming Equipment==
* [[Equipment Description]]

== BATC Conventions ==

Presentations from previous conventions can be found on this page [[BATC Conventions]]

==National and International Events==

* [[ HAM RADIO 2018 ]] ATV Presentations from HAM RADIO 2018 at Friedrichhsafen.

* [[ HAM RADIO 2019 ]] ATV Presentations from HAM RADIO 2019 at Friedrichshafen.

* [[ HAM RADIO 2022 ]] ATV Presentations from HAM RADIO 2022 at Friedrichshafen.

* [[ RSGB Convention 2022 ]] ATV Presentation at the 2022 RSGB Convention 2022

* [[ HAM RADIO 2023 ]] ATV Presentations from HAM RADIO 2023 at Friedrichshafen.

* [[ EMFcamp 2024 ]] BATC / AMSAT-UK / UKuG demonstration village at EMFcamp 2024.

==HAMTV on the ISS==
[[HAMTV from the ISS]]

== Getting on the air with ATV ==
===The ATV bands===
* [[29 MHz]]
* [[51 MHz]]
* [[71 MHz]]
* [[146 MHz RB-TV]]
* [[70cms Analogue TV]]
* [[70cm DATV]]
* [[23cms ATV]]
* [[13cms]]
* [[3.4 GHz DATV]]
* [[5.6 GHz]]
* [[10 GHz]]
* [[:Media:ATV on 5.6 10 and 24 Ghz.pdf|April 2018 Presentation to MMRT about ATV on 5.6 10 and 24 GHz]]

===The different ATV modes===
* [[Reduced bandwidth TV]] (RB-TV)
* [[The Effect of FEC]]

===Equipment Options===
* [[DATV transmitting Equipment]]

==Advanced encoding / input options==

Details of advanced transmission configurations, primarily for H265,and video production software.

* [[Feeding Video to Portsdown from vMix|Vmix output in to Portsdown IPTS input]]
* [[OBS - Open Broadcast Studio|OBS output in to Portsdown IPTS input]]
* [[Using GTX10xx Graphics card encoder with OBS]]
* [[Custom_DATV_Firmware_for_the_Pluto|Using the Pluto for DATV]]
* [[Jetson_Nano|Using the Jetson Nano with Portsdown]]

== Operating ==
* [[DATV equipment capability]] - Wiki page documenting the capabilities of common DATV transmit and receive equipment.
* [[ATV standards]] - a list of standards used by ATV operators including FM bandwidths, DATV PIDs, symbol rates and FEC
* [[EMF Compliance]] - information about EMF compliance for ATV and Microwave Operation
* [[Directory of portable sites]] suitable for ATV and microwave operation
* [https://www.google.com/maps/d/u/0/edit?mid=1VeLnRRbLwloDTL2i9-HE2sxqL0c&ll=52.95536632179757%2C-0.49709419999999227&z=7 Google map] showing possible portable operating sites
* [[Mapping tools]] including finding the QRA locator of a site, UK postcode to Lat and Long conversion and a topographic overlay for Google maps
* [[Propagation tools]]
* [[UK ATV DX Records]] - a list of Known DX Records for the UK
* [[2022 Activity Weekends]]
* [[2023 BATC Activity Weekends & Contests]]
* [[Christmas 2022 Repeater Contest & Activity Challenge]]
* [[Christmas 2023 Repeater Contest & Activity Challenge]]
* [[2023 6cm Activity Ladder]]
* [[IARU ATV contest]] - How to enter the annual international TV contest
* [[IARU ATV contest 2023 International Results]] - International Results for the June 2023 IARU Contest
* [[IARU ATV contest 2022 International Results]] - International Results for the June 2022 IARU Contest
* [[IARU ATV contest 2021 International Results]] - International Results for the June 2021 IARU Contest
* [[IARU ATV contest 2020 International Results]] - International Results for the June 2020 IARU Contest
* [[IARU ATV contest 2019 International Results]] - International Results for the June 2019 IARU Contest
* [[IARU ATV contest 2018 Results]] - UK Results for the June 2018 IARU and BATC Contests
* [[IARU ATV contest 2018 International Results]] - International Results for the June 2018 IARU Contest
* [[September 2019 BATC Low Band Contest]]

==ATV repeaters==
* [[UK ATV repeaters]]
* [[USA ATV repeaters]]
* [[Australian TV repeaters]]

* [[Technical topics for ATV repeater builders]]

==Es'hail-2==
* [[Es'hail-2 Basic Information|Getting started, LNBs and aligning a dish]]

* [[Es'hail-2 Ground Station|Es'hail-2 BATC WebSDR & DATV Spectrum Monitor]]

* [[Es'hail-2 DATV Bandplan]]

* [[Es'hail-2_LNBs_and_Antennaes|Es'hail-2_LNBs]]

* [[Transmitting_Oscar_100_DATV_signals|Es'hail-2 Transmitters]]

* [[Es'hail-2 Antennaes]]

* [[Es'hail-2 conference transmissions]]

==ATV projects==
* [[Adalm Pluto]] - Collection of information on using the Adalm Pluto for DATV
* [[The MacGuffin Project]] - Collection of tools used to create an automated multi-band ATV system
* [[Receiver upconverters]] - Details of upconverters to receive 146 and 437 MHz on STB and MiniTioune
* [[Jetson Nano]] - Third generation computer-based DATV Transmitter
* [[DTX1 TS]] - interface board to take in TS streams to the DTX1
* [[RpiDATV]] - software for the Rpi
* [[RBTVMOD]] - variable rate RB-TV mdulator for the Rpi
* [[DATVExpress]] - SDR hardware based DATV transmitter covering 70 - 2450 MHz
* [[PE4302]] - PE4302 variable attenuator project
* [[ADF435x PIC]] - PIC controllers for Chinese ADF4350/4351 boards
* [[DigiTwist]] - an experimental 2 axis satellite tracker
* [[G4WIM PA controller]] - an advanced PA controller design by G4WIM published in CQ-TV 265
* [[WinterHill Receiver Project]]
* [[Tilt-O-Matic]] Pan and tilt head for surveyor tripods
* [[Gerber Files]] Index of Gerber (PCB) files used by BATC and Members' Projects

== Deutschsprachiges Wiki ==

* Portsdown DATV Projekt - Deutschsprachiges Wiki
* Minitioune(r) - Deutschsprachiges Wiki

== Useful Circuits and notes ==
* [[Antenna changeover relays]] - Notes on suitable antenna change over relays for ATV use.
* [[Filters]] - Collection of links and designs for that most critical but over looked component!
* [[Pre-amps]] - Notes, suppliers and circuits of pre-amplifiers suitable for ATV
* [[Power amplifiers]] - Notes, suppliers and circuits of power amplifiers suitable for ATV
* [[Video circuits]] - Notes and circuits for video processing
* [[Satellite receiver tuning offsets]] - Note on how to set up a satellite receiver to directly receive L band signals.
* [[Using ex-satellite dishes]] - Notes on how to find the feed point of a dish and designs for feeds to use

== ATV Equipment manuals and schematics ==
* [[Bob Platts G8OZP]] Circuits and documentation for the Bob Platts range of equipment
* [[Comtech module]] - 23cms and 13cms ATV Tx and Rx circuits and guides
* [[Solent ATV units]] - Tx and Rx circuits and information
* [[Wood & Douglas FM TV equipment]] - Circuits, pcb layouts and information
* [[LMW Electronics]] - Circuits, pcb layouts and information
* [[Fortop]] - Circuits, pcb layouts and information
* [[Glencom]] - VC-510 VHF to L band up converter circuit diagram and modifications
* [[Global communications]] - Hand drawn circuit of tuneable 70 / 140 MHz to L band block up converter
* [[Jaybeam]] - Details of many Jaybeam aerials

== Ex commercial broadcast equipment manuals ==
* [[NDS System 3000]]
* [[NDS Alteia rx]]

== Test equipment Information ==
For HP and Agilent equipment see the [https://groups.io/g/HP-Agilent-Keysight-equipment]

== Other equipment information related to ATV ==

BATC Wiki

2024-06-04T21:46:26Z

G4FRE: /* Test equipment manuals */

'''Welcome to the British Amateur Television Club Wiki''' - the place to find information on all Amateur Television related equipment and projects. For details on how to join the BATC, the member's shop and CQ-TV archive and download visit the BATC website https://batc.org.uk/

This is your site, developed by the BATC for use by the worldwide ATV community - any information which you feel is of use to others can be put on the Wiki but please observe any copyright restrictions on the material you use.

* New to Amateur TV - Get the basics on our [[Getting Started|Getting Started page]]

* For details on the Portsdown DATV transmit and receive system go to [[The Portsdown DATV transceiver system|the Portsdown pages]]

* For information on the MiniTiouner USB DATV receiver go to [[MiniTioune|MiniTiouner]]

* For the DATV equipment capability list go to [[DATV equipment capability|https://wiki.batc.org.uk/DATV_equipment_capability]]

== Contents ==
* [[Registering]] on the BATC wiki

== New to Amateur TV? ==
* Get the basics on our [[Getting Started|Getting Started page]]

==BATC Information and services==
* [[Joining the BATC]]

* [[Renewing your membership]]

* The [[BATC Privacy statement and data protection policy]]

* The [[BATC forum]]

* The [[BATC shop]]

* The [[The_new_streamer|BATC streamer]]

* The [[BATC archive]] Collection of photos and documents from BATC's past

* The [[new BATC website|BATC website]]

== BATC projects ==
* [[The Portsdown Transmitter]] - the BATC's Raspberry Pi-based DATV Transmitter
* [[MiniTioune]] - the DATV DVB-S / S2 receiver project
* [[Ryde Receiver]] - Dedicated DATV set top box project
* [[Knucker]] - Variable bandwidth DVB-T project
* [[Advanced receiver hardware]] - Details of the BATC advanced receiver hardware.
* [[WinterHill Receiver Project]] - Multi-channel DVB-S / S2 project
* [[BATC Video Source]] - The Raspberry Pi-based composite video source described in CQ-TV 270
* [[BATC HDMI Source]] - The Raspberry Pi-based HDMI video source to be described in CQ-TV 280
* [[Digilite]] - The original home build DATV construction project
* [[Repeater Controller]] - The BATC ATV Repeater Controller using a Raspberry Pi 4
* [[ARISS Digital Communication System]]
* [[PicoTuner]] - A USB tuner for DATV using the RpiPico as the USB interface

== CQ-TV Magazine ==
* [[Index of articles]]
* [[Archive edition|Archive editions]] download
* [[BATC_Software_Library]] for project downloads

==BATC Event Streaming Equipment==
* [[Equipment Description]]

== BATC Conventions ==

Presentations from previous conventions can be found on this page [[BATC Conventions]]

==National and International Events==

* [[ HAM RADIO 2018 ]] ATV Presentations from HAM RADIO 2018 at Friedrichhsafen.

* [[ HAM RADIO 2019 ]] ATV Presentations from HAM RADIO 2019 at Friedrichshafen.

* [[ HAM RADIO 2022 ]] ATV Presentations from HAM RADIO 2022 at Friedrichshafen.

* [[ RSGB Convention 2022 ]] ATV Presentation at the 2022 RSGB Convention 2022

* [[ HAM RADIO 2023 ]] ATV Presentations from HAM RADIO 2023 at Friedrichshafen.

* [[ EMFcamp 2024 ]] BATC / AMSAT-UK / UKuG demonstration village at EMFcamp 2024.

==HAMTV on the ISS==
[[HAMTV from the ISS]]

== Getting on the air with ATV ==
===The ATV bands===
* [[29 MHz]]
* [[51 MHz]]
* [[71 MHz]]
* [[146 MHz RB-TV]]
* [[70cms Analogue TV]]
* [[70cm DATV]]
* [[23cms ATV]]
* [[13cms]]
* [[3.4 GHz DATV]]
* [[5.6 GHz]]
* [[10 GHz]]
* [[:Media:ATV on 5.6 10 and 24 Ghz.pdf|April 2018 Presentation to MMRT about ATV on 5.6 10 and 24 GHz]]

===The different ATV modes===
* [[Reduced bandwidth TV]] (RB-TV)
* [[The Effect of FEC]]

===Equipment Options===
* [[DATV transmitting Equipment]]

==Advanced encoding / input options==

Details of advanced transmission configurations, primarily for H265,and video production software.

* [[Feeding Video to Portsdown from vMix|Vmix output in to Portsdown IPTS input]]
* [[OBS - Open Broadcast Studio|OBS output in to Portsdown IPTS input]]
* [[Using GTX10xx Graphics card encoder with OBS]]
* [[Custom_DATV_Firmware_for_the_Pluto|Using the Pluto for DATV]]
* [[Jetson_Nano|Using the Jetson Nano with Portsdown]]

== Operating ==
* [[DATV equipment capability]] - Wiki page documenting the capabilities of common DATV transmit and receive equipment.
* [[ATV standards]] - a list of standards used by ATV operators including FM bandwidths, DATV PIDs, symbol rates and FEC
* [[EMF Compliance]] - information about EMF compliance for ATV and Microwave Operation
* [[Directory of portable sites]] suitable for ATV and microwave operation
* [https://www.google.com/maps/d/u/0/edit?mid=1VeLnRRbLwloDTL2i9-HE2sxqL0c&ll=52.95536632179757%2C-0.49709419999999227&z=7 Google map] showing possible portable operating sites
* [[Mapping tools]] including finding the QRA locator of a site, UK postcode to Lat and Long conversion and a topographic overlay for Google maps
* [[Propagation tools]]
* [[UK ATV DX Records]] - a list of Known DX Records for the UK
* [[2022 Activity Weekends]]
* [[2023 BATC Activity Weekends & Contests]]
* [[Christmas 2022 Repeater Contest & Activity Challenge]]
* [[Christmas 2023 Repeater Contest & Activity Challenge]]
* [[2023 6cm Activity Ladder]]
* [[IARU ATV contest]] - How to enter the annual international TV contest
* [[IARU ATV contest 2023 International Results]] - International Results for the June 2023 IARU Contest
* [[IARU ATV contest 2022 International Results]] - International Results for the June 2022 IARU Contest
* [[IARU ATV contest 2021 International Results]] - International Results for the June 2021 IARU Contest
* [[IARU ATV contest 2020 International Results]] - International Results for the June 2020 IARU Contest
* [[IARU ATV contest 2019 International Results]] - International Results for the June 2019 IARU Contest
* [[IARU ATV contest 2018 Results]] - UK Results for the June 2018 IARU and BATC Contests
* [[IARU ATV contest 2018 International Results]] - International Results for the June 2018 IARU Contest
* [[September 2019 BATC Low Band Contest]]

==ATV repeaters==
* [[UK ATV repeaters]]
* [[USA ATV repeaters]]
* [[Australian TV repeaters]]

* [[Technical topics for ATV repeater builders]]

==Es'hail-2==
* [[Es'hail-2 Basic Information|Getting started, LNBs and aligning a dish]]

* [[Es'hail-2 Ground Station|Es'hail-2 BATC WebSDR & DATV Spectrum Monitor]]

* [[Es'hail-2 DATV Bandplan]]

* [[Es'hail-2_LNBs_and_Antennaes|Es'hail-2_LNBs]]

* [[Transmitting_Oscar_100_DATV_signals|Es'hail-2 Transmitters]]

* [[Es'hail-2 Antennaes]]

* [[Es'hail-2 conference transmissions]]

==ATV projects==
* [[Adalm Pluto]] - Collection of information on using the Adalm Pluto for DATV
* [[The MacGuffin Project]] - Collection of tools used to create an automated multi-band ATV system
* [[Receiver upconverters]] - Details of upconverters to receive 146 and 437 MHz on STB and MiniTioune
* [[Jetson Nano]] - Third generation computer-based DATV Transmitter
* [[DTX1 TS]] - interface board to take in TS streams to the DTX1
* [[RpiDATV]] - software for the Rpi
* [[RBTVMOD]] - variable rate RB-TV mdulator for the Rpi
* [[DATVExpress]] - SDR hardware based DATV transmitter covering 70 - 2450 MHz
* [[PE4302]] - PE4302 variable attenuator project
* [[ADF435x PIC]] - PIC controllers for Chinese ADF4350/4351 boards
* [[DigiTwist]] - an experimental 2 axis satellite tracker
* [[G4WIM PA controller]] - an advanced PA controller design by G4WIM published in CQ-TV 265
* [[WinterHill Receiver Project]]
* [[Tilt-O-Matic]] Pan and tilt head for surveyor tripods
* [[Gerber Files]] Index of Gerber (PCB) files used by BATC and Members' Projects

== Deutschsprachiges Wiki ==

* Portsdown DATV Projekt - Deutschsprachiges Wiki
* Minitioune(r) - Deutschsprachiges Wiki

== Useful Circuits and notes ==
* [[Antenna changeover relays]] - Notes on suitable antenna change over relays for ATV use.
* [[Filters]] - Collection of links and designs for that most critical but over looked component!
* [[Pre-amps]] - Notes, suppliers and circuits of pre-amplifiers suitable for ATV
* [[Power amplifiers]] - Notes, suppliers and circuits of power amplifiers suitable for ATV
* [[Video circuits]] - Notes and circuits for video processing
* [[Satellite receiver tuning offsets]] - Note on how to set up a satellite receiver to directly receive L band signals.
* [[Using ex-satellite dishes]] - Notes on how to find the feed point of a dish and designs for feeds to use

== ATV Equipment manuals and schematics ==
* [[Bob Platts G8OZP]] Circuits and documentation for the Bob Platts range of equipment
* [[Comtech module]] - 23cms and 13cms ATV Tx and Rx circuits and guides
* [[Solent ATV units]] - Tx and Rx circuits and information
* [[Wood & Douglas FM TV equipment]] - Circuits, pcb layouts and information
* [[LMW Electronics]] - Circuits, pcb layouts and information
* [[Fortop]] - Circuits, pcb layouts and information
* [[Glencom]] - VC-510 VHF to L band up converter circuit diagram and modifications
* [[Global communications]] - Hand drawn circuit of tuneable 70 / 140 MHz to L band block up converter
* [[Jaybeam]] - Details of many Jaybeam aerials

== Ex commercial broadcast equipment manuals ==
* [[NDS System 3000]]
* [[NDS Alteia rx]]

== Test equipment manuals ==
For HP and Agilent equipment see the [https://groups.io/g/HP-Agilent-Keysight-equipment]

== Other equipment information related to ATV ==

Portsdown Test Cards

2023-08-27T09:44:04Z

G4FRE: /* Custom Test Cards */

===Introduction===

All versions of the Portsdown Transmitter have a Test Card transmit function; this is based on the Test Card F. The Portsdown 4 has the additional capability to select one of 12 Test Cards for use.

===Test Card Selection===

On Menu 3, there is a "Select Test Card" Button. This brings up a screen with 12 available Test Cards. Five of these are in-built cards, but 7 are easily customised for individual use. The in-built cards are shown here:

[[File:tcfm.jpg|144px]] [[File:tcc.jpg|144px]] [[File:pm5544.jpg|144px]] [[File:75cb.jpg|144px]] [[File:11g.jpg|144px]]

Widescreen versions of these cards are also included. These can be transmitted by slecting Format: 16:9 or 720p (rather than 4:3) on Menu 1.

===Callsign Caption===

The Callsign caption is automatically displayed on Test Card F, but is turned off for the other cards as it is unlikely to be in the right position, or rendered at the correct size. The Caption can be turned on or off from the Test Card menu, or from the button on Menu 1.

===Custom Test Cards===

Provision has been made to install 7 custom Test Cards. However, the Portsdown stores 3 versions of each card:
* A 4:3 version which is a .jpg file of 720x576 pixels.
* A 16:9 version which is a .jpg file of 1024x576 pixels
* A 720p version which is a .jpg file of 1280x720 pixels

If only one of these files is uploaded, the uploaded Test card will only be available in the uploaded definition.

The custom files need to be uploaded to the /home/pi/rpidatv/scripts/images folder. The basic file name used for the 4:3 card, it should be appended with "w16" for the 16:9 card, and with "w" for the 720p card. The basic filename (without the .jpg extension) should be written into the testcard_config.txt file. A suitable title for the Touchscreen button can also be added.

Custom Test Cards are preserved during software updates.

Portsdown 4 HDMI Repeater TX Card Setup

2023-08-27T09:16:00Z

G4FRE:

'''Modifications to a Standard Portsdown 4 Card for Repeater Operation'''

1. Set the video source. Option 1 Source, Option 3 Widescreen, down arrow to HDMI (Elgato), space bar to select, press enter. Next select 720p. Use down arrows to highlight, spacebar to select and then press enter

2. Set the Symbol Rate. Option 2 Output, Option 1 Symbol Rate, 1000 (for example), press enter.

3. Set the Output Device. Option 2 Output, Option 3 Output mode, down arrow to LIMEDVB, space bar to select, press enter.

4. Set the Transmit Frequency. Option 2 Output, Option 5 Frequency, 1310 (for example) enter. Then enter again to select Direct (no transverter).

5. Set the Modulation. Option 2 Output, Option 8 Modulation, down arrow to S2QPSK, space bar to select, press enter.

6. Set the FEC. Option 2 Output, Option 2 FEC, down arrow to 23 (DVB-S2 2/3), space bar to select, press enter. (Note that you cannot do this before you have selected the modulation).

7. Set the Station Callsign. Option 3 Station, delete BATC, enter the repeater callsign, press enter. Then enter the repeater locator if you know it. It is not used, so you can leave the existing locator by pressing enter.

8. Set the Audio Input. By default, the HDMI audio is used. However, if you want to transmit stereo analogue audio, then an EasyCap can be used. To switch to this: Option 5 System, Option 8 Audio Input, down arrow to “video”, space bar to select, press enter. Make sure that a Portsdown-compatible EasyCap is connected at this stage.

9. Set the Autoboot. Option 5 System, Option 1 Autostart, down arrow to TX_Boot or Keyed_TX_boot (as required), space bar to select, press enter. This action also sets the Raspberry Pi to reboot itself at 3 am and 3 pm (UTC) each day.

10. Load the LimeSDR firmware. Make sure that tt the LimeSDR Mini and the Elgato Camlink are connected to the USB3 (blue) ports on the Raspberry Pi 4. Configure the LimeSDR by first selecting Option 7 Lime Config.

a. First check the existing LimeSDR Firmware version: Option 7 Lime Config, Option 2 Lime FW Version. The gateware revision will be a number between 26 and 30. If it is not 30, you should upgrade your LimeSDR.

b. Upgrade to gateware revision 30. Option 7 Lime Config, Option 4 update to FW 1.30. Press enter. Then y, enter, watch progress and then press any key.

c. Next, IN ALL CASES, you must overwrite some of the Lime gateware for the LimeDVB software. Option 7 Lime Config, Option 5 Update to DVB FW. Press enter. Then y, enter, watch progress and then press any key.

There is no way of checking that the LimeDVB firmware is loaded (apart from correct operation). Subsequent Lime FW version checks will report gateware version 30.

11. If you want the hardware triggered shutdown to be operable (think carefully, as inadvertent operation by another party may require a site visit), then you should enable it now. Option 9 Shutdown, Option 8 Button Enable.

12. Now you should reboot (Option 9 Shutdown, Option 2, Reboot Now) and check that your repeater transmitter restarts and operates correctly.

13. Connect again using KiTTY. Type menu and press enter. The console menu will start.

14. You can now set the LimeSDR gain to adjust the output power. 100 is the maximum, 80 is about 20 dB down, but the steps are non-linear. Option 7 Lime Config, Option 6 Set Lime Gain, enter the number, press enter.

Typical output levels and shoulders at 1308 MHz (LimeSDR Mini with LimeDVB firmware) are:

Lime Gain 90, Output Level -2.5dBm, shoulders -48db
Lime Gain 92, Output level 0dBm, shoulders -45dB
Lime gain 94, Output level +2.5dBM, shoulders -40dB
Lime gain 96, Output level +3.5dBm, shoulders -38dB.

That completes the configuration of your SD Card and Lime SDR.

'''Usage Notes'''

1. Repeater cards can be set to boot to transmit or boot to keyed transmit. If set to boot to keyed transmit, the keying signal is applied on GPIO Pin 12, and should be set to 3.3 volts (no more!) to demand transmit, and to 0 volts to stop transmit. When the keying signal is acknowledged, GPIO pin 7 is set to 3.3v. It goes to 0v when transmit stops.

2. Note that the key acknowledge signal is set high before the transmission has started. The PTT signal on GPIO pin 40 goes high when the transmission is valid, and this should be used to key the PA, as it will prevent any LimeSDR calibration signals from being transmitted. LimeSDR Calibration signals are many dB higher in level than the desired signal, and the PA (or at least the driver stage) should not be keyed until the signal on pin 40 goes high. It is not possible to prevent the Lime Calibration with this software version.

3. Transmit key signals need to be well behaved. The software cannot cope with brief (< 1 second) transmit de-selections and will not transmit a valid picture after such an event. However, if the key signal is then stopped for 3 seconds and restarted, valid transmissions will then restart.

4. To reduce the need for site visits, the Raspberry Pi is set to reboot every 12 hours. If the Raspberry Pi is connected to the internet, this will occur at 3 am and 3 pm GMT.

5. The repeater cards are not configured to be used with a touchscreen.

6. Power output varies with frequency according to the chart on the BATC Wiki https://wiki.batc.org.uk/LimeSDR_Mini_Output_Power_Levels and the output level at Lime Gain = 100 is about 4 dB below the level shown on the chart. Output level decreases as Lime Gain is reduced, but the relationship between Lime Gain and output level is very non-linear. Note that the output in LimeDVB mode is about 10 dB lower than the output with the standard firmware. The signal is much cleaner though.

7. The LimeSDR Mini can overheat during continuous use. For best results it should be fan-cooled.

8. The Raspberry Pi power supply voltage should be set to 5.2 volts. After installation, check that at least 5.0 volts is present on the GPIO connector (measured between GPIO pin 4 and pin 6). Lower voltages result in poor video and audio quality. Excessive voltage drop is usually caused by poor quality USB power leads. A powered USB hub should be used to connect the LimeSDR; the EasyCap can usually be directly connected to the Raspberry Pi assuming a good quality USB lead is used.

9. The Raspberry Pi 4 is known for running hot. In this application it is working reasonably hard (between 30% and 40% on all 4 cores), so a heatsink case (available from Pimoroni) is the minimum cooling that should be used.

Configuring your channel

2023-08-27T09:14:03Z

G4FRE: /* Using an H265 Encoder Box */

To configure your streaming channel you will need to log in as a member and then go to your account dashboard - see this page for more details [[Account_Dashboard|on your account dashboard]] - scroll down on the page to Streaming details.

[[File:Streaming Details.JPG|600px]]

==Chat nick name==

This field sets your nick name as it appears on any streaming channels you are watching when you are logged in as a member - by default it is set to "first name_call sign" and we would suggest you do not change it from this convention.

==Stream Title==

This field sets the name of your own personal stream that appears on the channel list under the main streamer menu. By default it is set to your callsign.

==Stream output URL==

This is the direct URL you can give to people to watch your stream. You cannot change this URL.

'''Note - the full URL is made up of the https address above the grey box PLUS the text in the grey box (which is the stream name) without any spaces between them.
For example the stream name for the above screen shot is "https://batc.org.uk/live/g8gkq"'''

==Stream input URL==

This is the input URL which must be put into your streaming encoder. You cannot change this URL and should not pass it on to anyone else.

'''Note - the full URL is "rtmp://rtmp.batc.org.uk/live/callsign-keykey" where callsign is the stream name listed in the first grey box and keykey is the key listed in the second grey box. The stream name and key are separated by a hyphen.'''

===Streaming from the Portsdown===

The Portsdown is already set up to stream to the streamer. Up to 8 stream names and keys can be set up on the Portsdown 4.

Then from the main Menu, select Output to, BATC Stream. Then you can select from one of the 8 streams by pressing the "Stream to" button on the Main Menu.

From the Touchscreen:

# Select Menu 3
# Select "Set Stream Outputs"
# Select "Amend Preset"
# Choose which of the 8 buttons to program and select it
# Change the keyboard to lower case and enter the stream name and press enter
# Change the keyboard to lower case and enter the stream key and press enter
# Exit to Main Menu
# Select "Output to"
# Select BATC Stream
# Select the Video source
# Press TX

===Using Adobe Media encoder===

[[File:adobe stream.JPG|400px]]

* In the '''FMS URL:''' box put "rtmp://rtmp.batc.org.uk/live" (Note there is no / on the end)

* In the '''Stream:''' box put your "callsign-key".

===Using Vmix===

For Vmix, put <code>rtmp://rtmp.batc.org.uk/live</code> in the "URL" field and the stream name and key separated by a hyphen (for example <code>g8gkq-abcxyz</code>) in the "Stream Name or Key" field.

===Using OBS===

For OBS, put <code>rtmp://rtmp.batc.org.uk/live</code> in the "URL" field and the stream name and key separated by a hyphen (for example <code>g8gkq-abcxyz</code>) in the "Stream key" field.

===Using an H265 Encoder Box===

The Chinese H265 / 264 encoder box (model ON-DMI-16D) can also stream using RTMP to the BATC streamer site while at the same time 'multi-casting' to your Pluto for RF transmission and streaming rtsp for local monitoring on VLC.
However currently the BATC streamer will only accept H264 which means that your Pluto will also have to be set to H264 on the Pluto controller page.
The encoder cannot produce H264 for the BATC streamer and H265 for Pluto at the same time.

The url for the RTMP stream to the BATC streamer is of the form:

rtmp://88.80.184.32/live/your_callsign-keykey

One thing to be aware of is when entering the 6 character key make sure you get it correct - my key happened to contain character "I" capital i, which can be confused with lowercase L . Using capital i fixed the problem !

The error was caused by copying the key on paper from the RPI 7" LCD streamer where both characters look the same.

To see the output of the encoder box locally using VLC enter this url rtsp://192.168.1.120:554/live/0 into VLC. This assumes your encoder box IP address is 192.168.1.120

==Stream type==

This selection determines if your stream appears as a member, repeater or special event stream in the streamer main channel list ([https://batc.org.uk/live/ https://batc.org.uk/live/]). You cannot change this.

==Stream options==

* "Stream listed" You can decide if your stream is listed in the streamer channel list '''(by default streams are not listed and this box should be ticked to use the stream).
'''
* The "Chat On" box is ticked by default; if you untick this, there will be no chat window associated with your stream.

* "Guest chat log in" If ticked it means that non-BATC Members will be able to post in your chat window; all they need to do is type "/nick display-name" and their chat will appear labelled with "display-name" or whatever they have entered. It is recommended that you normally leave this box unticked to prevent abuse of the service and limit chat access to logged-in BATC members.

==Streaming type==

The Streaming Type sets the default video player type on the Live Stream page, this can be set to either Flash or HTML5.

=== Flash Player ===

'''Advantages'''
* Minimal delay (typically less than 1 second)

'''Disadvantages'''
* The user needs Flash Player plugin installed, and manually enabled.
** If the webpage detects that Flash is not installed, the user will then be given a link to use HTML5 player to view the stream.

=== HTML5 Player ===

'''Advantages'''
* Plays without plugins on all modern desktop and mobile (phone/tablet) browsers

'''Disadvantages'''
* Long and variable delay (typically 10-20 seconds depending on user's browser)

==Stream description==

The stream description is the area below the video player and text chat windows on your channel page. You can use this area to describe your channel and give more details of your group or repeater.

[[File:streamer.JPG|400px]]

It is a free text area and can include HTML - we recommend you use an external HTML editor such as https://html-online.com/editor/ to get the correct look and then paste the code into the space.

Please note any embedded content such as maps and time clocks etc from other sites must use an SSL connection and have an https:// address.

BATC Wiki

2023-08-09T10:29:05Z

G4FRE: /* ATV projects */

'''Welcome to the British Amateur Television Club Wiki''' - the place to find information on all Amateur Television related equipment and projects. For details on how to join the BATC, the member's shop and CQ-TV archive and download visit the BATC website https://batc.org.uk/

This is your site, developed by the BATC for use by the worldwide ATV community - any information which you feel is of use to others can be put on the Wiki but please observe any copyright restrictions on the material you use.

* New to Amateur TV - Get the basics on our [[Getting Started|Getting Started page]]

* For details on the Portsdown DATV transmit and receive system go to [[The Portsdown DATV transceiver system|the Portsdown pages]]

* For information on the MiniTiouner USB DATV receiver go to [[MiniTioune|MiniTiouner]]

* For the DATV equipment capability list go to [[DATV equipment capability|https://wiki.batc.org.uk/DATV_equipment_capability]]

== Contents ==
* [[Registering]] on the BATC wiki

== New to Amateur TV? ==
* Get the basics on our [[Getting Started|Getting Started page]]

==BATC Information and services==
* [[Joining the BATC]]

* [[Renewing your membership]]

* The [[BATC Privacy statement and data protection policy]]

* The [[BATC forum]]

* The [[BATC shop]]

* The [[The_new_streamer|BATC streamer]]

* The [[BATC archive]] Collection of photos and documents from BATC's past

* The [[new BATC website|BATC website]]

== BATC projects ==
* [[The Portsdown Transmitter]] - the BATC's Raspberry Pi-based DATV Transmitter
* [[MiniTioune]] - the DATV DVB-S / S2 receiver project
* [[Ryde Receiver]] - Dedicated DATV set top box project
* [[Knucker]] - Variable bandwidth DVB-T project
* [[Advanced receiver hardware]] - Details of the BATC advanced receiver hardware.
* [[WinterHill Receiver Project]] - Multi-channel DVB-S / S2 project
* [[BATC Video Source]] - The Raspberry Pi-based composite video source described in CQ-TV 270
* [[BATC HDMI Source]] - The Raspberry Pi-based HDMI video source to be described in CQ-TV 280
* [[Digilite]] - The original home build DATV construction project
* [[Repeater Controller]] - The BATC ATV Repeater Controller using a Raspberry Pi 4

== CQ-TV Magazine ==
* [[Index of articles]]
* [[Archive edition|Archive editions]] download
* [[BATC_Software_Library]] for project downloads

==BATC Event Streaming Equipment==
* [[Equipment Description]]

== BATC Conventions ==
* [[CAT 23 part 1]]
* [[CAT 22 part 2]] Presentations from the CAT 22 Part 2 Zoom Meeting.
* [[CAT 22 part 1]] Chairman's report from the BATC GM
* [[CAT 21]] Presentations from CAT 21 which was conducted as a Zoom Meeting.
* [[CAT 20]] Presentations from CAT 20 which was conducted as a Zoom Webinar.
* [[CAT 19 South|CAT 19 South (Didcot)]] Presentations from the 2019 regional convention at Didcot.
* [[CAT 19 Finningley]] Presentations from the 2019 regional convention at Finningley.
* [[CAT 19 Bristol]] Presentations from the 2019 regional convention at Bristol.
* [[CAT 18|CAT 18 Coventry]] Presentations and links to the videos from the 2018 convention.
* [[CAT 17|CAT 17 Finningley|]] Antenna test range results, presentations and links to the videos from the 2017 convention.
* [[Presentations from CAT 16|CAT 16 Cosford]] Presentations and links to the videos from the 2016 convention.
* Video Recordings from previous ATV Conventions can be found on the [https://www.youtube.com/channel/UCUWLnUZllytlcCFd93tnBzw BATC YouTube Channel].

==National and International Events==

* [[ HAM RADIO 2018 ]] ATV Presentations from HAM RADIO 2018 at Friedrichhsafen.

* [[ HAM RADIO 2019 ]] ATV Presentations from HAM RADIO 2019 at Friedrichshafen.

* [[ HAM RADIO 2022 ]] ATV Presentations from HAM RADIO 2022 at Friedrichshafen.

* [[ RSGB Convention 2022 ]] ATV Presentation at the 2022 RSGB Convention 2022

* [[ HAM RADIO 2023 ]] ATV Presentations from HAM RADIO 2023 at Friedrichshafen.

== Getting on the air with ATV ==
===The ATV bands===
* [[29 MHz]]
* [[51 MHz]]
* [[71 MHz]]
* [[146 MHz RB-TV]]
* [[70cms Analogue TV]]
* [[70cm DATV]]
* [[23cms ATV]]
* [[13cms]]
* [[3.4 GHz DATV]]
* [[5.6 GHz]]
* [[10 GHz]]
* [[:Media:ATV on 5.6 10 and 24 Ghz.pdf|April 2018 Presentation to MMRT about ATV on 5.6 10 and 24 GHz]]

===The different ATV modes===
* [[Reduced bandwidth TV]] (RB-TV)
* [[The Effect of FEC]]

===Equipment Options===
* [[DATV transmitting Equipment]]

==Advanced encoding / input options==

Details of advanced transmission configurations, primarily for H265,and video production software.

* [[Feeding Video to Portsdown from vMix|Vmix output in to Portsdown IPTS input]]
* [[OBS - Open Broadcast Studio|OBS output in to Portsdown IPTS input]]
* [[Using GTX10xx Graphics card encoder with OBS]]
* [[Custom_DATV_Firmware_for_the_Pluto|Using the Pluto for DATV]]
* [[Jetson_Nano|Using the Jetson Nano with Portsdown]]

== Operating ==
* [[DATV equipment capability]] - Wiki page documenting the capabilities of common DATV transmit and receive equipment.
* [[ATV standards]] - a list of standards used by ATV operators including FM bandwidths, DATV PIDs, symbol rates and FEC
* [[EMF Compliance]] - information about EMF compliance for ATV and Microwave Operation
* [[Directory of portable sites]] suitable for ATV and microwave operation
* [https://www.google.com/maps/d/u/0/edit?mid=1VeLnRRbLwloDTL2i9-HE2sxqL0c&ll=52.95536632179757%2C-0.49709419999999227&z=7 Google map] showing possible portable operating sites
* [[Mapping tools]] including finding the QRA locator of a site, UK postcode to Lat and Long conversion and a topographic overlay for Google maps
* [[Propagation tools]]
* [[UK ATV DX Records]] - a list of Known DX Records for the UK
* [[2022 Activity Weekends]]
* [[2023 BATC Activity Weekends & Contests]]
* [[Christmas 2022 Repeater Contest & Activity Challenge]]
* [[2021 5.6GHz Activity Ladder]]
* [[IARU ATV contest]] - How to enter the annual international TV contest
* [[IARU ATV contest 2022 International Results]] - International Results for the June 2022 IARU Contest
* [[IARU ATV contest 2021 International Results]] - International Results for the June 2021 IARU Contest
* [[IARU ATV contest 2020 International Results]] - International Results for the June 2020 IARU Contest
* [[IARU ATV contest 2019 International Results]] - International Results for the June 2019 IARU Contest
* [[IARU ATV contest 2018 Results]] - UK Results for the June 2018 IARU and BATC Contests
* [[IARU ATV contest 2018 International Results]] - International Results for the June 2018 IARU Contest
* [[September 2019 BATC Low Band Contest]]

==ATV repeaters==
* [[UK ATV repeaters]]
* [[USA ATV repeaters]]
* [[Australian TV repeaters]]

* [[Technical topics for ATV repeater builders]]

==Es'hail-2==
* [[Es'hail-2 Basic Information|Getting started, LNBs and aligning a dish]]

* [[Es'hail-2 Ground Station|Es'hail-2 BATC WebSDR & DATV Spectrum Monitor]]

* [[Es'hail-2 DATV Bandplan]]

* [[Es'hail-2_LNBs_and_Antennaes|Es'hail-2_LNBs]]

* [[Transmitting_Oscar_100_DATV_signals|Es'hail-2 Transmitters]]

* [[Es'hail-2 Antennaes]]

* [[Es'hail-2 conference transmissions]]

==ATV projects==
* [[Adalm Pluto]] - Collection of information on using the Adalm Pluto for DATV
* [[The MacGuffin Project]] - Collection of tools used to create an automated multi-band ATV system
* [[Receiver upconverters]] - Details of upconverters to receive 146 and 437 MHz on STB and MiniTioune
* [[Jetson Nano]] - Third generation computer-based DATV Transmitter
* [[DTX1 TS]] - interface board to take in TS streams to the DTX1
* [[RpiDATV]] - software for the Rpi
* [[RBTVMOD]] - variable rate RB-TV mdulator for the Rpi
* [[DATVExpress]] - SDR hardware based DATV transmitter covering 70 - 2450 MHz
* [[PE4302]] - PE4302 variable attenuator project
* [[ADF435x PIC]] - PIC controllers for Chinese ADF4350/4351 boards
* [[DigiTwist]] - an experimental 2 axis satellite tracker
* [[G4WIM PA controller]] - an advanced PA controller design by G4WIM published in CQ-TV 265
* [[WinterHill Receiver Project]]
* [[Tilt-O-Matic]] Pan and tilt head for surveyor tripods
* [[Gerber Files]] Index of Gerber (PCB) files used by BATC and Members' Projects

== Deutschsprachiges Wiki ==

* Portsdown DATV Projekt - Deutschsprachiges Wiki
* Minitioune(r) - Deutschsprachiges Wiki

== Useful Circuits and notes ==
* [[Antenna changeover relays]] - Notes on suitable antenna change over relays for ATV use.
* [[Filters]] - Collection of links and designs for that most critical but over looked component!
* [[Pre-amps]] - Notes, suppliers and circuits of pre-amplifiers suitable for ATV
* [[Power amplifiers]] - Notes, suppliers and circuits of power amplifiers suitable for ATV
* [[Video circuits]] - Notes and circuits for video processing
* [[Satellite receiver tuning offsets]] - Note on how to set up a satellite receiver to directly receive L band signals.
* [[Using ex-satellite dishes]] - Notes on how to find the feed point of a dish and designs for feeds to use

== ATV Equipment manuals and schematics ==
* [[Bob Platts G8OZP]] Circuits and documentation for the Bob Platts range of equipment
* [[Comtech module]] - 23cms and 13cms ATV Tx and Rx circuits and guides
* [[Solent ATV units]] - Tx and Rx circuits and information
* [[Wood & Douglas FM TV equipment]] - Circuits, pcb layouts and information
* [[LMW Electronics]] - Circuits, pcb layouts and information
* [[Fortop]] - Circuits, pcb layouts and information
* [[Glencom]] - VC-510 VHF to L band up converter circuit diagram and modifications
* [[Global communications]] - Hand drawn circuit of tuneable 70 / 140 MHz to L band block up converter
* [[Jaybeam]] - Details of many Jaybeam aerials

== Ex commercial broadcast equipment manuals ==
* [[NDS System 3000]]
* [[NDS Alteia rx]]

== Test equipment manuals ==
For HP and Agilent equipment see the [https://groups.yahoo.com/neo/groups/hp_agilent_equipment/info Yahoo group]

== Other equipment information related to ATV ==

UK ATV DX Records

2023-02-05T22:33:26Z

G4FRE: /* 122GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2022.pdf
<be>

Tropo-ducting opened up on Non 13 2022 on
* 70 CM for a very long two-way QSO between Germany and England

Five new world records were added in the summer of 2022.
* 6M a new world record was accomplished in June 2022 with the help of Es propagation.
* 144 MHz record in July 2022 during the Dutch RBDTV Contest using mainly "airplane-scatter".
* 10 GHz a new world record was accomplished in May 2022.
* 2.4 GHz a new world record was accomplished in May 2022.
* 440 MHz a new world record was accomplished in May 2022.

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''
|}

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2022-06-24T07:03:47Z

G4FRE: /* 122GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''
|}

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022
|}

==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2022-06-24T07:03:24Z

G4FRE:

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 904.12 km IT5HZM - IW9GUR

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''
|}

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 21-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022
|}
==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

5.6 GHz

2022-02-27T10:36:33Z

G4FRE: /* Satellite dishes */

[[File:5.6 GHz Orientation Small.jpg|300px|center]]
It is very easy (and low cost) to get on the air on 5.6GHz (the 6 cm amateur band), using the cheap modules intended to transmit “First Person Video” (FPV) back from drones to their operators. These units can be used without any modifications to get on air, and with simple WiFi plate or dish antennas (and a clear line of sight path) can be used to send pictures to stations using the same equipment over paths in excess of 50km.

M0KPW has an excellent website describing his 5.6GHz system http://www.5-6ghz-atv.co.uk/

==Frequency choice==

The overall UK amateur band plan is shown on the RSGB website here: https://rsgb.org/main/operating/band-plans/. As the UK amateur frequency allocation for 5 GHz is not contiguous spectrum, the RSGB has some [https://rsgb.org/main/operating/band-plans/microwaves/5-7-and-10ghz/ useful guidance] which is adapted below with arrow markers:-

[[File:bandplan.JPG|800px]]

GB3KM has a licensed input on 5665 MHz and this has been chosen as the primary ATV operating frequency. Audio WB-FM operators have been using 5825 and 5840 MHz. 5825 MHz is too close to the band edge for ATV, and 5840 MHz is marginal. So 5665 is the general ATV preference

The FPV equipment receive and transmit frequencies are set using DIP switches, and most tune to 5665 MHz – but care needs to be taken when selecting equipment to make sure it does cover this frequency. Example channel tables are shown at the bottom of this page.

==Equipment==

The FPV units are widely advertised on eBay and other sites with titles similar to “Tarot 5.8G 600MW Telemetry TX/RX Combo for FPV Image Transmission TL300N” and are available at reasonable prices. The typical units are very small but have reasonable FM-TV performance with a quoted transmitter spec of 600mW output and receiver sensitivity of -80dBm. Amplifiers are available to raise the output power to 2 watts or more.

[[File:Tairot 1.jpg|400px]]

Be aware – we have found that on some receiver units, the video output is on the Red phono lead and not the expected Yellow lead!

Some other users' stations are described here [[5.6 GHz Equipment Examples]].

===Mounting the equipment===
Due to the very high losses in co-ax cable at 5.6GHz it is recommended that you mount the units very close to the antennas and run long 12V dc, audio and video cables back down to the shack or operating position.

Be aware also, that whilst these units are very small they do run very hot in operation, and it is suggested that you provide a good heatsink for both Tx and Rx – mounting them in a diecast box on the back of their respective antennas is ideal.

[[File:GKQ 5.6v2.JPG|600px]]

Details of G8GKQ's transceiver setup is shown here (receiver unit on left & transmitter with fan on the right)

===Transmit amplifiers===

Whilst the basic units work very well and have been used to transmit over paths of 60km, power amplifiers to boost the 600mW transmitter signal to 2—4 Watts are available from several suppliers on eBay and other sites, and will significantly increase the path length that the units will work over. These amplifiers should be connected after the transmit unit, but before any antenna change over relay(s) – and remember that his will increase the volt drop on any long 12V cable feeding the transmitter at the masthead.

Be warned!! Several users have found these PAs to be "fragile", so you should always make sure that the antenna is connected – and all connectors done up tight – before applying dc or RF power. We are investigating whether they can be made more reliable by reducing the volts / input drive.

[[File:56PA.jpg|200px]]

==Antenna changeover relays==

The FPV equipment comes as separate Tx and Rx units. In order to operate on a single antenna, you will need an antenna changeover relay. Note, however, that the losses at 5.6GHz can be significant and care must be taken when wiring up the units to ensure RF cables are of good quality, and kept to a minimum length – semi-rigid cables fitted with SMA connectors are ideal.

PL259 and even BNC connectors are very lossy at 5.6GHz and should not be used, but the surplus SMA relays often available at rallys are ideal for 5.6 GHz.

See [[Antennae changeover relays|this wiki page]] for more details on suitable relays, 24 volt operation, and 4 port (or transfer) relays.

If no suitable relay is available, it may be cheaper to use separate antennas for receive and transmit as shown in the picture below – note the Tx and Rx units are mounted directly on the back of the flat panel antennas.

[[File:562.jpg|200px]]

===Reverse SMA===

Be aware that all the 5.6GHz FPV units use "reverse SMA" connectors (as used on WiFi equipment) and that all low-loss cables (unless bought specifically for the purpose) and surplus SMA relays will almost certainly have standard SMA connectors – which will not fit. Adapters from reverse to standard SMA are available on eBay or other suppliers – search for "RP-SMA to SMA adaptor" or similar wording.

==Antennas==

As 5.8GHz is used by broadband wireless networks, there is a wide choice of antennas available for use on 5.6GHz ATV. These can range from flat plates/panels to wire mesh (grid) dishes, as seen in the above pictures.

Horizontal polarisation has been chosen as the standard (waveguide feeds needs to have the long dimension of the aperture – and/or horn – vertically oriented when feeding dishes)

=== Satellite dishes ===

It is also possible to use a satellite mini dish with a suitable feed, such as a waveguide/horn to the design by G4NNS – see here for construction details: http://myweb.tiscali.co.uk/g4nns/FeedHorn.html

The picture shows a Sky mini dish fed with a WA5VJB log-periodic PCB feed http://www.wa5vjb.com/products1.html – these are available in the UK from G4DDK. http://www.g4ddk.com/Prices2.html

Dishes of this size typically have a beam width of 4—8 degrees.

[[File:56 dish feed.JPG|400px]]

M1BKF found a very interesting 5.6GHz feed for standard f/d ratio satellite dishes; it contains what looks like a PCB yagi, and was available from www.antennas-amplifiers.com:

[[File:PCB dish feed.JPG|200px]] [[File:PCB dish feed2.JPG|300px]]

=== DIY BiQuad antennae ===

This web page http://buildyourownantenna.blogspot.co.uk/2014/07/double-biquad-sector-antenna-for-5-ghz-wifi.html has a well engineered double BiQuad antenna with a quoted 13dBi gain.

Note in the picture G8JAN has directly connected the Tx module to the antenna to avoid co-ax losses.

[[File:feed.jpg|400px]]

==Video equipment - Rx==
The receiver output will need to be directly connected to a monitor with a composite video input to view the received the signal – normally on a yellow phono or RCA connector.

===Video squelch defeat===

Beware of using modern flat-screen monitors which have a video squelch – these will not display noisy signals, and just give a blue screen until they get a strong video signal.

There are a number of circuits around to defeat the squelch and also improve the readability of the signal.

===Syncsmurf by PE1RQM===
– kits are available; details on the [https://translate.google.com/translate?hl=auto&sl=auto&tl=en-US&u=https%3A%2F%2Fwww.pe1rqm.nl%2Fsyncsmurf2%2F webpage here].

[[File:syncsmurf1.jpg|200px]]

Results are very impressive:

[[File:syncsmurf2.jpg|400px]]

===eachine FPV recorder===

Several people have reported that they are using these devices, available from various sites, and as well as defeating the monitor blue screen by inserting syncs on noise they have a single push button record facility. They record to an SD card which can be removed and the files viewed on a PC; users report that you need to use a good quality SD card, and that they have had problems with Kingston branded cards – Sandisk are preferred.
The one issue with them is that they crop PAL signals removing 15% at the top and bottom of the picture. This is a hardware issue, so no amount of software updates will solve it. The workaround is that the unit will not crop PAL pictures if the video input is present when the unit is powered up. NTSC pictures are not affected

[[File:emachine dvr.JPG|300px]]

===Video sync processor===

[[File:cqtv 129.jpg|300px]]

Or any video sync processor may be usable such as the Advanced Converter Enhancer used by many stations on 23cms FM TV transmissions.

[[File:ACE.jpg|300px]]

==Receive Pre-amplifiers==

The basic drone recievers are fairly sensitive. However the perfomance can be improved by using a pre-amp before the unit but is also recommended that a bandpass filter included on the pre-amp output.

A cheap but high performance pre-amp can be made using the surplus LNA PCBs available from Franco in Italy https://www.rf-microwave.com/en/nbp/nmp/10-ghz-amplifier-24ghz-doubler/su-02/

These boards are fantastic value for money and can be used to make 10GHz pre-amps or the devices can be used to replace blown devices in most DB6NT transverters.

The following document shows the simple mods required to make a 5.6GHz pre-amp:

[[File:5.6GHz pre-amp.JPG|600px]]

The unit requires 5volts and minus volts for bias which can either be generated using the circuit on the main Franco PCB or the following circuit:

[[File:supply.jpg|600px]]

==Video equipment - Tx==
An old camcorder with a yellow phono "video out" socket is an ideal video and audio source for the transmitter.

Don't forget that you will need to display your call sign to remain legal. This can be a video generator, a .jpg card reader with video out, or a piece of card with your call sign scribbled on it!

===Media card reader===

A simple way to generate test patterns is to use a media card reader loaded with .jpg files – these are available on several sites, just search for "SD card media AV player" – but make sure you get one which outputs PAL video.

[[File:av player.JPG|200px]]

===PicDream===
The PicDream project uses a single PIC chip and a 4MHz crystal to generate a black and white test pattern – simple but effective – the original project was described in CQ-TV 180 and re-printed in CQ-TV 247.

[[File:Picdream 247.JPG|400px]]

The PIC code is available for download here: batc.org.uk/cq-tv/software/picdream.zip

===PicDream II===

[[File:picdream2.jpg|400px]]

The PicDream II project uses a PIC chip and an AD724 PAL ecnoder chip to generate a colour test pattern with moving insets. The text and colours on the test pattern can be set through it's serial link.

Further information is at https://github.com/F1CJN/PICDREAM-II

===Raspberry Pi - PA3CHM image generator===

CQ-TV 247 published details of a simple RPi-based test card generator by Ernest PA3CHM.

[[File:PA3chm.JPG|400px]]

Full details are on his website: http://www.pa3hcm.nl/?p=248

===Raspberry Pi - Portsdown patterns===
The BATC Portsdown project can be configured to deliver composite video and audio out from the RPi multi-jack plug.

[[File:GKQ July 2017 (Small).JPG|400px]]

This can be test patterns, RPi desktop, or the Portsdown camera and microphone – [[Analog Video Output|see this wiki page for more details]] making the RPi the only piece of video/audio equipment you need to drive the 5.6GHz transmitter.

===Stand alone Raspberry Pi animated test card generator===
This is the stand alone version of the animated test card generator that is part of the Portsdown software
[[RPi Test Card| - see this wiki page for more details]]

==On the air==

Using dish aerials of 30—60cm, line of sight ranges of 80km can easily be achieved.

P5 (noise free) FM ATV pictures have been exchanged over a 138km path using the equipment described on this page – the picture below shows G4CPE/P on Dunstable Downs being received at the Ridgeway, near Didcot, over a slightly obstructed 66km path.

[[File:CPE 5.6GHz.JPG|400px]]

Dunkery Beacon near Minehead, to Cleeve Common near Cheltenham.
The picture shows G8GTZ/P received by G8GKQ/P over the 138km path.

[[File:snap5 small.jpg|400px]]

2018-04-21: The UK "record" for a contact using standard FPV units was increased to 153km between GW3NWR/P at Bylchau, North Wales to M0KPW/P and G0HIK/P at the Kirkstone Pass Inn, Cumbria.

This has since been surpassed.

==FM voice only==

Several stations in the Gloucester and Bolton area are using these units for wideband FM voice only. This is achieved by simply putting high level (1V peak-peak) audio on the yellow video TX phono input – this modulates the main high level carrier with audio rather than video (the two audio phono connectors – red and white – can be ignored). On RX, the yellow phono connector of the receiver is simply connected to a line level input of an audio amplifier.

It is done this way because the two audio subcarriers transmitted by the unit are at a level 20dB lower than that of the main (video)carrier. However, as it is using the same bandwidth Rx and Tx system, performance will be no better than FM video – ideally the 480MHz RX IF would be tapped off in to an SDR or narrow band receiver to give significantly enhanced (+20db?) narrow band performance.

==Activity hot spots==

There is a Google map showing approximate locations of stations thought to be active on 5.6GHz FM – if you are on 5.6GHz, you can add or edit your station: https://www.google.com/maps/d/u/0/edit?mid=1e4keFSFWy6wLUQNF3IT3n6h90eU&ll=52.39133141509076%2C-1.8917942000000494&z=7

Known users include:

*Southern England = G8GKQ, G8GTZ, G0UHY, G8XZD, G4UVZ, G3VPF
*Dunstable area = M0SKM, G4CPE, G0WFT
*North-East = GB3KM, G1LPS, M0DTS
*Cheltenham = G0LGS, M0RKX and G4NZV (using WB audio only)
*Bolton Wireless Club = G4JLG, G6GVI, G8PEF, M0UFC, MW1FGQ (PW “Siren” Article)
*Ludlow, Shropshire = G8XYJ
*Yorkshire = G8BYN
*Norfolk = G4NJJ, G8JAN, G4WVU and M1BKF
*Cumbria - Barrow-in-Furness Radio Club project
*Merseyside - G3NWR
*Northern Ireland = GI4DOH, GI3VAF, GI0GDP, GI7UGV

[[File:cpe2.jpg|400px]]

==More information==

Dave G8GKQ did a presentation at the BATC annual convention CAT17 in September 2017 on getting started on 5.6GHz ATV.
*The presentation is available here https://wiki.batc.org.uk/images/4/42/CAT17_5.6_GHzv2.pdf
*The video of the session is available on the BATC YouTube channel here https://www.youtube.com/watch?v=XJzGNsGmE9Y

==On line support / social media==

There is a thread running on the BATC forum where the ATV community are exchanging ideas and also posting results of the latest on air tests. https://forum.batc.org.uk/viewtopic.php?f=2&t=5026

Note that the BATC core team do not regularly visit Facebook pages - time is just too short to monitor everything and it's not easy to follow threads on Facebook.

==Technical information==

===SM201R===
The large RX chip in most units has had the part number removed, however it appears that a lot of receivers use the SM201R module. The spec and pinout are shown below but notice the frequency range of this particular unit does not seem to cover 5665MHz, so make sure the one you buy does!

[[File:sm201r 2.jpg|500px]] [[File:sm201r 3.JPG|200px]]

[[File:sm201r 1.JPG|500px]]

===S meter output===

Looking at the above table, it appears that the RSSI is available on pin 17 of the SM201R and could potentially be used for a signal strength meter to help align the antennas when setting up a QSO.

It also appears that the SM201R uses a 480MHz IF (same as the Comtech) and potentially could be modified with narrower filters to improve RF performance.

====Tx and Rx perfomance====

Initial measurements suggest the TX bandwidth is 25—30MHz.

[[File:5.6GHz spectrum.jpg|500px]]

This accounts for the quoted RX sensitivity at -80dBm which may be improved by an LNA but will ultimately be limited by the RX IF bandwidth.

===Channel Listings===

As mentioned above, the channel settings vary from manufacturer to manufacturer. This table is taken from the Tarot data sheet which uses the SM201R module but does include 5665MHz:

[[File:Tarot_Channels.jpg|603px]]

And this is the table for the Eachine TS835 transmitter:

[[File:Channels_2.jpg|619px]]

This table is from a "Fat Shark" transmitter that does not cover 5665 MHz:

[[File:Fat_Shark.PNG|300px]]

==Improvements to Commercial Units==

In CQ-TV 260, Achille I2GLI described improvements and additions to the Mateksys VTX-HV drone transmitter to make a high quality 18 watt output 5.6 GHz FM transmitter. One of the improvements was to replace the video and sound baseband circuitry. The published circuit diagram in online CQ-TV was a little unclear (although the printed version is good). The circuit diagram is reproduced below.
[[File:BandaBase.jpg|672px]]

5.6 GHz

2022-02-27T10:31:37Z

G4FRE: /* Satellite dishes */

[[File:5.6 GHz Orientation Small.jpg|300px|center]]
It is very easy (and low cost) to get on the air on 5.6GHz (the 6 cm amateur band), using the cheap modules intended to transmit “First Person Video” (FPV) back from drones to their operators. These units can be used without any modifications to get on air, and with simple WiFi plate or dish antennas (and a clear line of sight path) can be used to send pictures to stations using the same equipment over paths in excess of 50km.

M0KPW has an excellent website describing his 5.6GHz system http://www.5-6ghz-atv.co.uk/

==Frequency choice==

The overall UK amateur band plan is shown on the RSGB website here: https://rsgb.org/main/operating/band-plans/. As the UK amateur frequency allocation for 5 GHz is not contiguous spectrum, the RSGB has some [https://rsgb.org/main/operating/band-plans/microwaves/5-7-and-10ghz/ useful guidance] which is adapted below with arrow markers:-

[[File:bandplan.JPG|800px]]

GB3KM has a licensed input on 5665 MHz and this has been chosen as the primary ATV operating frequency. Audio WB-FM operators have been using 5825 and 5840 MHz. 5825 MHz is too close to the band edge for ATV, and 5840 MHz is marginal. So 5665 is the general ATV preference

The FPV equipment receive and transmit frequencies are set using DIP switches, and most tune to 5665 MHz – but care needs to be taken when selecting equipment to make sure it does cover this frequency. Example channel tables are shown at the bottom of this page.

==Equipment==

The FPV units are widely advertised on eBay and other sites with titles similar to “Tarot 5.8G 600MW Telemetry TX/RX Combo for FPV Image Transmission TL300N” and are available at reasonable prices. The typical units are very small but have reasonable FM-TV performance with a quoted transmitter spec of 600mW output and receiver sensitivity of -80dBm. Amplifiers are available to raise the output power to 2 watts or more.

[[File:Tairot 1.jpg|400px]]

Be aware – we have found that on some receiver units, the video output is on the Red phono lead and not the expected Yellow lead!

Some other users' stations are described here [[5.6 GHz Equipment Examples]].

===Mounting the equipment===
Due to the very high losses in co-ax cable at 5.6GHz it is recommended that you mount the units very close to the antennas and run long 12V dc, audio and video cables back down to the shack or operating position.

Be aware also, that whilst these units are very small they do run very hot in operation, and it is suggested that you provide a good heatsink for both Tx and Rx – mounting them in a diecast box on the back of their respective antennas is ideal.

[[File:GKQ 5.6v2.JPG|600px]]

Details of G8GKQ's transceiver setup is shown here (receiver unit on left & transmitter with fan on the right)

===Transmit amplifiers===

Whilst the basic units work very well and have been used to transmit over paths of 60km, power amplifiers to boost the 600mW transmitter signal to 2—4 Watts are available from several suppliers on eBay and other sites, and will significantly increase the path length that the units will work over. These amplifiers should be connected after the transmit unit, but before any antenna change over relay(s) – and remember that his will increase the volt drop on any long 12V cable feeding the transmitter at the masthead.

Be warned!! Several users have found these PAs to be "fragile", so you should always make sure that the antenna is connected – and all connectors done up tight – before applying dc or RF power. We are investigating whether they can be made more reliable by reducing the volts / input drive.

[[File:56PA.jpg|200px]]

==Antenna changeover relays==

The FPV equipment comes as separate Tx and Rx units. In order to operate on a single antenna, you will need an antenna changeover relay. Note, however, that the losses at 5.6GHz can be significant and care must be taken when wiring up the units to ensure RF cables are of good quality, and kept to a minimum length – semi-rigid cables fitted with SMA connectors are ideal.

PL259 and even BNC connectors are very lossy at 5.6GHz and should not be used, but the surplus SMA relays often available at rallys are ideal for 5.6 GHz.

See [[Antennae changeover relays|this wiki page]] for more details on suitable relays, 24 volt operation, and 4 port (or transfer) relays.

If no suitable relay is available, it may be cheaper to use separate antennas for receive and transmit as shown in the picture below – note the Tx and Rx units are mounted directly on the back of the flat panel antennas.

[[File:562.jpg|200px]]

===Reverse SMA===

Be aware that all the 5.6GHz FPV units use "reverse SMA" connectors (as used on WiFi equipment) and that all low-loss cables (unless bought specifically for the purpose) and surplus SMA relays will almost certainly have standard SMA connectors – which will not fit. Adapters from reverse to standard SMA are available on eBay or other suppliers – search for "RP-SMA to SMA adaptor" or similar wording.

==Antennas==

As 5.8GHz is used by broadband wireless networks, there is a wide choice of antennas available for use on 5.6GHz ATV. These can range from flat plates/panels to wire mesh (grid) dishes, as seen in the above pictures.

Horizontal polarisation has been chosen as the standard (waveguide feeds needs to have the long dimension of the aperture – and/or horn – vertically oriented when feeding dishes)

=== Satellite dishes ===

It is also possible to use a satellite mini dish with a suitable feed, such as a waveguide/horn to the design by G4NNS – see here for construction details: http://myweb.tiscali.co.uk/g4nns/FeedHorn.html

The picture shows a Sky mini dish fed with a WA5VJB log-periodic PCB feed http://www.wa5vjb.com/products1.html – these are available in the UK from G4DDK. http://www.g4ddk.com/Prices2.html

Dishes of this size typically have a beam width of 4—8 degrees.

[[File:56 dish feed.JPG|400px]]

M1BKF found a very interesting 5.6GHz feed for standard f/d ratio satellite dishes; it contains what looks like a PCB yagi, and is available from:

<s>http://www.antennas-amplifiers.com/5.1-5.5-5.8GHz-WLAN-WiFi-Antenna/Feed-Illuminator-satellite-offset-dish-fd-0.5-0.8</s>

https://www.antennas-amplifiers.com/feed-Illuminator-satellite-offset-dish-fd-0.5-0.8

[[File:PCB dish feed.JPG|200px]] [[File:PCB dish feed2.JPG|300px]]

=== DIY BiQuad antennae ===

This web page http://buildyourownantenna.blogspot.co.uk/2014/07/double-biquad-sector-antenna-for-5-ghz-wifi.html has a well engineered double BiQuad antenna with a quoted 13dBi gain.

Note in the picture G8JAN has directly connected the Tx module to the antenna to avoid co-ax losses.

[[File:feed.jpg|400px]]

==Video equipment - Rx==
The receiver output will need to be directly connected to a monitor with a composite video input to view the received the signal – normally on a yellow phono or RCA connector.

===Video squelch defeat===

Beware of using modern flat-screen monitors which have a video squelch – these will not display noisy signals, and just give a blue screen until they get a strong video signal.

There are a number of circuits around to defeat the squelch and also improve the readability of the signal.

===Syncsmurf by PE1RQM===
– kits are available; details on the [https://translate.google.com/translate?hl=auto&sl=auto&tl=en-US&u=https%3A%2F%2Fwww.pe1rqm.nl%2Fsyncsmurf2%2F webpage here].

[[File:syncsmurf1.jpg|200px]]

Results are very impressive:

[[File:syncsmurf2.jpg|400px]]

===eachine FPV recorder===

Several people have reported that they are using these devices, available from various sites, and as well as defeating the monitor blue screen by inserting syncs on noise they have a single push button record facility. They record to an SD card which can be removed and the files viewed on a PC; users report that you need to use a good quality SD card, and that they have had problems with Kingston branded cards – Sandisk are preferred.
The one issue with them is that they crop PAL signals removing 15% at the top and bottom of the picture. This is a hardware issue, so no amount of software updates will solve it. The workaround is that the unit will not crop PAL pictures if the video input is present when the unit is powered up. NTSC pictures are not affected

[[File:emachine dvr.JPG|300px]]

===Video sync processor===

[[File:cqtv 129.jpg|300px]]

Or any video sync processor may be usable such as the Advanced Converter Enhancer used by many stations on 23cms FM TV transmissions.

[[File:ACE.jpg|300px]]

==Receive Pre-amplifiers==

The basic drone recievers are fairly sensitive. However the perfomance can be improved by using a pre-amp before the unit but is also recommended that a bandpass filter included on the pre-amp output.

A cheap but high performance pre-amp can be made using the surplus LNA PCBs available from Franco in Italy https://www.rf-microwave.com/en/nbp/nmp/10-ghz-amplifier-24ghz-doubler/su-02/

These boards are fantastic value for money and can be used to make 10GHz pre-amps or the devices can be used to replace blown devices in most DB6NT transverters.

The following document shows the simple mods required to make a 5.6GHz pre-amp:

[[File:5.6GHz pre-amp.JPG|600px]]

The unit requires 5volts and minus volts for bias which can either be generated using the circuit on the main Franco PCB or the following circuit:

[[File:supply.jpg|600px]]

==Video equipment - Tx==
An old camcorder with a yellow phono "video out" socket is an ideal video and audio source for the transmitter.

Don't forget that you will need to display your call sign to remain legal. This can be a video generator, a .jpg card reader with video out, or a piece of card with your call sign scribbled on it!

===Media card reader===

A simple way to generate test patterns is to use a media card reader loaded with .jpg files – these are available on several sites, just search for "SD card media AV player" – but make sure you get one which outputs PAL video.

[[File:av player.JPG|200px]]

===PicDream===
The PicDream project uses a single PIC chip and a 4MHz crystal to generate a black and white test pattern – simple but effective – the original project was described in CQ-TV 180 and re-printed in CQ-TV 247.

[[File:Picdream 247.JPG|400px]]

The PIC code is available for download here: batc.org.uk/cq-tv/software/picdream.zip

===PicDream II===

[[File:picdream2.jpg|400px]]

The PicDream II project uses a PIC chip and an AD724 PAL ecnoder chip to generate a colour test pattern with moving insets. The text and colours on the test pattern can be set through it's serial link.

Further information is at https://github.com/F1CJN/PICDREAM-II

===Raspberry Pi - PA3CHM image generator===

CQ-TV 247 published details of a simple RPi-based test card generator by Ernest PA3CHM.

[[File:PA3chm.JPG|400px]]

Full details are on his website: http://www.pa3hcm.nl/?p=248

===Raspberry Pi - Portsdown patterns===
The BATC Portsdown project can be configured to deliver composite video and audio out from the RPi multi-jack plug.

[[File:GKQ July 2017 (Small).JPG|400px]]

This can be test patterns, RPi desktop, or the Portsdown camera and microphone – [[Analog Video Output|see this wiki page for more details]] making the RPi the only piece of video/audio equipment you need to drive the 5.6GHz transmitter.

===Stand alone Raspberry Pi animated test card generator===
This is the stand alone version of the animated test card generator that is part of the Portsdown software
[[RPi Test Card| - see this wiki page for more details]]

==On the air==

Using dish aerials of 30—60cm, line of sight ranges of 80km can easily be achieved.

P5 (noise free) FM ATV pictures have been exchanged over a 138km path using the equipment described on this page – the picture below shows G4CPE/P on Dunstable Downs being received at the Ridgeway, near Didcot, over a slightly obstructed 66km path.

[[File:CPE 5.6GHz.JPG|400px]]

Dunkery Beacon near Minehead, to Cleeve Common near Cheltenham.
The picture shows G8GTZ/P received by G8GKQ/P over the 138km path.

[[File:snap5 small.jpg|400px]]

2018-04-21: The UK "record" for a contact using standard FPV units was increased to 153km between GW3NWR/P at Bylchau, North Wales to M0KPW/P and G0HIK/P at the Kirkstone Pass Inn, Cumbria.

This has since been surpassed.

==FM voice only==

Several stations in the Gloucester and Bolton area are using these units for wideband FM voice only. This is achieved by simply putting high level (1V peak-peak) audio on the yellow video TX phono input – this modulates the main high level carrier with audio rather than video (the two audio phono connectors – red and white – can be ignored). On RX, the yellow phono connector of the receiver is simply connected to a line level input of an audio amplifier.

It is done this way because the two audio subcarriers transmitted by the unit are at a level 20dB lower than that of the main (video)carrier. However, as it is using the same bandwidth Rx and Tx system, performance will be no better than FM video – ideally the 480MHz RX IF would be tapped off in to an SDR or narrow band receiver to give significantly enhanced (+20db?) narrow band performance.

==Activity hot spots==

There is a Google map showing approximate locations of stations thought to be active on 5.6GHz FM – if you are on 5.6GHz, you can add or edit your station: https://www.google.com/maps/d/u/0/edit?mid=1e4keFSFWy6wLUQNF3IT3n6h90eU&ll=52.39133141509076%2C-1.8917942000000494&z=7

Known users include:

*Southern England = G8GKQ, G8GTZ, G0UHY, G8XZD, G4UVZ, G3VPF
*Dunstable area = M0SKM, G4CPE, G0WFT
*North-East = GB3KM, G1LPS, M0DTS
*Cheltenham = G0LGS, M0RKX and G4NZV (using WB audio only)
*Bolton Wireless Club = G4JLG, G6GVI, G8PEF, M0UFC, MW1FGQ (PW “Siren” Article)
*Ludlow, Shropshire = G8XYJ
*Yorkshire = G8BYN
*Norfolk = G4NJJ, G8JAN, G4WVU and M1BKF
*Cumbria - Barrow-in-Furness Radio Club project
*Merseyside - G3NWR
*Northern Ireland = GI4DOH, GI3VAF, GI0GDP, GI7UGV

[[File:cpe2.jpg|400px]]

==More information==

Dave G8GKQ did a presentation at the BATC annual convention CAT17 in September 2017 on getting started on 5.6GHz ATV.
*The presentation is available here https://wiki.batc.org.uk/images/4/42/CAT17_5.6_GHzv2.pdf
*The video of the session is available on the BATC YouTube channel here https://www.youtube.com/watch?v=XJzGNsGmE9Y

==On line support / social media==

There is a thread running on the BATC forum where the ATV community are exchanging ideas and also posting results of the latest on air tests. https://forum.batc.org.uk/viewtopic.php?f=2&t=5026

Note that the BATC core team do not regularly visit Facebook pages - time is just too short to monitor everything and it's not easy to follow threads on Facebook.

==Technical information==

===SM201R===
The large RX chip in most units has had the part number removed, however it appears that a lot of receivers use the SM201R module. The spec and pinout are shown below but notice the frequency range of this particular unit does not seem to cover 5665MHz, so make sure the one you buy does!

[[File:sm201r 2.jpg|500px]] [[File:sm201r 3.JPG|200px]]

[[File:sm201r 1.JPG|500px]]

===S meter output===

Looking at the above table, it appears that the RSSI is available on pin 17 of the SM201R and could potentially be used for a signal strength meter to help align the antennas when setting up a QSO.

It also appears that the SM201R uses a 480MHz IF (same as the Comtech) and potentially could be modified with narrower filters to improve RF performance.

====Tx and Rx perfomance====

Initial measurements suggest the TX bandwidth is 25—30MHz.

[[File:5.6GHz spectrum.jpg|500px]]

This accounts for the quoted RX sensitivity at -80dBm which may be improved by an LNA but will ultimately be limited by the RX IF bandwidth.

===Channel Listings===

As mentioned above, the channel settings vary from manufacturer to manufacturer. This table is taken from the Tarot data sheet which uses the SM201R module but does include 5665MHz:

[[File:Tarot_Channels.jpg|603px]]

And this is the table for the Eachine TS835 transmitter:

[[File:Channels_2.jpg|619px]]

This table is from a "Fat Shark" transmitter that does not cover 5665 MHz:

[[File:Fat_Shark.PNG|300px]]

==Improvements to Commercial Units==

In CQ-TV 260, Achille I2GLI described improvements and additions to the Mateksys VTX-HV drone transmitter to make a high quality 18 watt output 5.6 GHz FM transmitter. One of the improvements was to replace the video and sound baseband circuitry. The published circuit diagram in online CQ-TV was a little unclear (although the printed version is good). The circuit diagram is reproduced below.
[[File:BandaBase.jpg|672px]]

Portsdown 4 Pluto

2022-02-12T08:05:10Z

G4FRE: /* Limitations */

Evariste, F5OEO has produced firmware for the Pluto SDR which enables it to be a very capable DATV modulator. This firmware has 2 modes.

* RTMP stream Input
* Webpage Control with UDP stream input.

The RTMP stream input mode is very suitable for use in small systems and this is what is used by the Portsdown.

The Webpage control mode is ideal for desktop computers and is continually being developed. It is not suitable for use with the Portsdown.

===Mode of Operation===

The existing Portsdown software has had additional commands added to enable it to generate an RTMP stream (using ffmpeg) and send it to the Pluto. RTMP will only handle H264 encoding, so MPEG-2 (and H265) modes are not available.

===Suitable Pluto Firmware===

All testing has been done using F5OEO's "for the brave" Pluto firmware (FIRM2101RC of 5 February 2020). Extract the firmware from this zip file [[:File:FIRM2101RC.zip]] and follow the instructions on this web page '''VERY CAREFULLY''' [https://wiki.analog.com/university/tools/pluto/users/firmware#mass_storage_update Analog Devices Firmware Upgrade Instructions]. The Pluto must already have been modified for extended frequency range, and it is worth enabling the second processor.

You can check that you have the correct Firmware loaded from the "Pluto Configuration Menu" (reached from Menu 3). It should report Firmware version v0.31-4-g9ceb-dirty.

===Powering the Pluto===

The Raspberry Pi 4 has increased power capabilities on its USB ports, and the Pluto does not work well with USB Hubs, so it is recommended that you connect the Pluto directly to a USB3 port (the blue ones) on the Raspberry Pi 4. Do not use a USB hub or power the Pluto from its USB power port.

===Current Functionality===

* H264 only. No MPEG-2 or H265 (even when using IPTS In)
* 4:3 SD, 16:9 or 720p. No 1080p
* You can set and store (for each band) Pluto relative power on a range of 0 to -71. This approximates to dBm, but is plus or minus 10 dB.
* Maximum frequency 4.1 GHz (so no 6 cm band).
* I have seen it work well on symbol rates between 125 and 1000 kS.
* DVB-S or DVB-S2
* DVB-T from 150 kHz to 1 MHz bandwidth
* Video source Pi Cam (must have USB audio dongle connected as well), Comp Video, old-style C920, Test card, Contest or LKV373A HDMI.
* Pluto and RPi GPIO PTT switching implemented.
* H264 IPTS In for both DVB-S/S2 output and DVB-T output

===Limitations===

* In DVB-S mode, a bug prevents transmissions at FECs of 5/6 and 7/8. All other FECs are OK. There is no plan to fix this.
* In DVB-S and DVB-S2 modes, if a callsign with a / is used (like G8GKQ/P), the Pluto will transmit "Service01" as the Provider ID.
* The maximum supported symbol rate for DVB-S or DVB-S2 with the Pluto is 1 MS. If you want higher SRs it is recommended that you use a LimeSDR Mini with the LimeDVB firmware.
* An audio source (such as a webcam microphone or USB dongle) must be present and selected for DVB-S/S2 transmissions, otherwise the transmitter will not operate.
* Transmitting only a carrier is not supported by the Pluto firmware

Portsdown hardware

2022-01-03T10:15:05Z

G4FRE: /* LimeSDR */

This page describes all the hardware modules and interconnections required to build the Portsdown DATV system.

Not all the hardware is required before the transmitter can start to be tested – an incremental approach is described here to allow constructors to gain confidence as they assemble the parts.

===Raspberry Pi ===

The first item required is a standard Raspberry Pi - this can be a Pi 3 or Pi 4 depending upon the Portsdown version you are building. These are available from many suppliers and we suggest you just buy a Raspberry Pi without any additional boards or SD cards as you will be using specific Portsdown hardware and software. If you are starting a new build, the Raspberry Pi 4 Model B with 2 GB of RAM is recommended (4 GB or 8 GB or RAM will work, but costs more for no performance advantage).

The Raspberry Pi 4 can run hot, so using a heatsink case or fan to cool it is recommended.

===Power Supplies ===

You will also need a GOOD 3amp 5v power supply for the Raspberry Pi.

You should power a Pi 4 via the GPIO pins but always power a RPi 3 through the Micro-USB power connector to take advantage of the input protection provided. Use a very short USB cable to your power supply as most of these cables are of very poor quality and cause a significant voltage drop.

If you see a "Lightning Flash" symbol at the top right of your LCD display it means that the voltage at the RPi is too low. You can measure the voltage between the GPIO connector pins 4 and 6.

[[File:flash.jpg|200px]]

A lot of strange problems, such as the Portsdown running very slowly, can be caused by poor PSU volts - the RPi is actually specified for 5.1 volts, so make sure that your PSU delivers enough volts and current. See [https://forum.batc.org.uk/viewtopic.php?t=4856&p=11935#p11935 this post on the BATC forum] for a real user experience!

You may also need a 12 volt DC supply to power the other Portsdown components.

===Micro-SD Card===

You then need an SD card with the Portsdown software on it.

The easiest way is to buy a pre-programmed SD Card from the [https://batc.org.uk/shop/portsdown-transmitter-pre-programmed-sd-card/ BATC shop].

OR if you want to have a go at loading the software yourself you will need to or purchase a '''good quality card''' from another source and follow the instructions described [[Portsdown software|here]]. The 8 GB, 16 GB or 32 GB SanDisk Ultra (the red and grey one) is recommended - DO NOT use cheap copies.

===LCD Touchscreen===

The touchscreen is required to control the transmitter without the use of another computer.

'''Do not buy a touchscreen that connects through the RPi HDMI connector - it is NOT supported.'''

===7" Touchscreen===

The Portsdown 4 ONLY works with the Official Raspberry Pi 7" touchscreen (often referred to as a "7 inch Element 14 touchscreen"). The Portsdown 2020 works best with this screen, but can also use the 3.5 inch screen (below).

[[File:7_inch_screen.jpg|400px]]

Note that if you use the 7-inch screen, you do not need to connect the 3 data leads between the screen and the RPi - only ground and +5v.

===3.5" Touchscreen"===

'''Note this is NOT supported on the Portsdown 4.'''

The other supported touchscreen on Portsdown 2020 is a 3.5 inch diagonal Waveshare Raspberry Pi LCD (Model A, not Model B).

To mount the Waveshare screen away from the RPi, you could use this extension cable: https://thepihut.com/products/adafruit-gpio-extender-cable-for-raspberry-pi-model-a-b-26pin-12-long Just make sure that you triple-check the connections and pin orientation before connecting the screen. They do not tolerate incorrect connection as several of us have found out! Alternatively, you can make one yourself from a discarded 3.5 inch floppy drive and its lead.

Further information on screens can be found here [[Portsdown Displays]] and information on display resolutions can be found here [[Display Resolutions|PAL/NTSC and Display Resolutions]].

Mounting the Waveshare LCD Touchscreen can be a challenge! This 3D print design mounts it flat to the panel: https://www.thingiverse.com/thing:1941701
This 3D print design mounts it at an angle: https://www.thingiverse.com/thing:1920486.

Note that, when mounted, none of the touchscreen sensitive areas should be in contact with the surround.

===GPIO Extender Card===

In the completed unit, there are a number of signals that need to be routed in or out of the GPIO interface on the RPi. Plus we need to break out all 40 pins of the GPIO, and have another connector on top for the Waveshare LCD display (if used). Because of this the Portsdown team have designed a PCB for the job - the blank PCB for this is available from the BATC shop.

Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely.

[[File:screw t.jpg|400px]]

The BATC card is very simple to construct with no components other than plugs and sockets.

For full construction details and a list of suppliers for the plugs and sockets see [[GPIO breakout|the GPIO breakout page]]

You can buy the GPIO Extender Card blank PCB from the [https://batc.org.uk/shop/portsdown-transmitter-gpio-breakout-board-blank-pcb/ Portsdown section in the BATC shop - item 3]

===LimeSDR ===

The Portsdown system can use the LimeSDR Mini (or LimeSDR USB) to provide the modulator and RF generator functions.

[[File:LimeMini.jpg|400px]]

[[Using LimeSDR with Portsdown|See this page]] for more details on using the LimeSDR in a Portsdown system.

===Pluto SDR===

The Portsdown 4 uses the Pluto SDR connected via the USB port to provide the modulator and RF generator functions.

See this page for more details: [[Portsdown_4_Pluto]]

----------------------

'''You now have the components for a fully working Portsdown transmitter!

---------------------

'''''However, you will need a camera and audio input to transmit pictures and sound.'''''

===Raspberry Pi Camera===

If you want to transmit live pictures you will need a camera. The standard Pi camera gives excellent results but will need mounting in a housing and does not have audio input.

Raspberry Pi Camera: CPC Farnell http://cpc.farnell.com/raspberry-pi/rpi-8mp-camera-board/raspberry-pi-camera-board-8mp/dp/SC14028

===Optional RPi camera Extension Lead Kit===

The RPi camera gives excellent results, but only comes with a short ribbon cable to connect it to the RPi.

It is possible to use some higher quality HDMI leads (the ground connections all need to be made) to extend the camera lead - this does NOT mean the signal out of the camera is HDMI, it is actually "Camera Serial Interface Type 2 (CSI-2)". We are just using HDMI cable as a useful extension lead.

Kits are available to connect a female HDMI connector to the RPi camera connector, and another female to the camera, allowing the use of domestic 1, 2 and 3m HDMI leads.

RPi Camera HDMI Lead Extension Kit: https://www.tindie.com/products/freto/pi-camera-hdmi-cable-extension/

There are 2 modifications that can be made to enable lower quality HDMI leads (those without all the ground connections made, or even the CEC wire on pin 13 missing) to be used. Full details of these modifications [[CSI-2 to HDMI|are available here.]]

===WebCams===

Some WebCams work with the Portsdown, but it has proved very difficult to support more than a few specific models. The Portsdown 2020 works with the older (pre-2019) versions of the Logitech C920. The Portsdown 4 works with all (3) versions of the C920 and with the Logitech C170. More details on webcams here [[Portsdown Webcams]].

===Composite Video Capture Device===

The transmitter is also capable of working with a USB-connected “EasyCap” dongle to capture PAL composite video from camcorders and analogue mixers etc.

There are at least 4 similar devices being marketed under this name on eBay, each with different chipsets, but only the Fushicai "USBTV007" brand is guaranteed to work.

[[File:Fushicai.JPG|200px]]

===Audio Capture Device===

eBay provides a good source for very cheap audio capture USB dongles, which can provide an audio input to go with the RPi camera. The audio capuure device must be of the type shown here:

[[File:04 USB Audio.png|200px]]

Other stand-alone USB audio capture devices may not work and the software will not be changed to support them. Please don't ask.

This type of audio capture device is also compatible with the Ryde DATV Receiver and the Langstone Microwave transceiver.

-----------------------------
'''That completes the basic Portsdown transmitter shopping list'''

---------------------
'''''However, the team has designed some additional components to enable you to build a complete DATV transmit system'''''

===RF Switching===

The complete RF switching arrangement illustrated below allows you to select the output from the Lime SDR or Pluto, adjust the exact level and then route the RF to any one of 8 PAs or transverters. All the blocks in the diagram are optional; however, you can build a very comprehensive system if you want to. Note that the 4-way decode and switch boards can be substituted for the 8-way decode and switch boards.

[[File:20190511 Portsdown RF Switching.jpg|600px]]

===4-Band RF Output Switch===

The Portsdown team have developed a 4-Band RF output switch capable of switching the low level output of the Lime Mini / Pluto to separate amplifiers for the 70, 144, 437 and 1255 MHz bands. Note: due to potential high insertion loss, it is not recommended to use the switch above 23cms.

[[File:Pd out SW.jpg|300px]]

Full details including parts list and schematic are available [[RF output switch|on this wiki page]].

===4-Band Decode Switch===

The Portsdown provides band switching and PTT outputs on the GPIO pins - these outputs need to be decoded to provide an output for each band.

[[File:Band decoder.JPG|200px]]

The Portsdown team have designed a simple board for switching between 4 bands and buffering the PTT signal which can be either constructed on 0.1” perforated board (veroboard) or on a PCB - this can be home etched.
Full details on the board including circuit etc [[PTT and band switching|are available here.]]
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-transmitter-4-band-decode-blank-pcb/ BATC shop - item 5].

===8-Band RF Output Switch===

For those of you who also want to drive Microwave transverters from your Portsdown, the team have developed an 8-Band RF output switch that includes an RF amplifier. It is designed to be used with the Output Attenuator (see below). It will be capable of amplifying the variable level from the attenuator and switching it to separate amplifiers for the 70, 144, 437 and 1255 MHz bands, and to 4 transverters for the higher bands. PCBs are on order and will be available from the BATC Shop.

Full details including parts list and schematic are available [[8-Band RF Output Switch|on this wiki page]].
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-way-rf-output-switch-blank-pcb/ BATC shop - item 9].

===8-Band Decoder===

This 8-band decoder is designed to work with the 8-band RF output switch and the Portsdown software. It will provide switching signals (either always on, or PTT activated) to 4 Power Amplifiers and 4 transverters, and it also enables you to set which VCO filter should be switched in for the 4 transverter outputs. PCBs are on order and will be available from the BATC Shop.

Full details on the board including circuit etc [[8-Band Decoder|are available here.]]
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-band-decode-blank-pcb/ BATC shop - item 7].

===8-Band Decode PIC===

This is the pre=programmed PIC to control the custom designed 8 band decode board for the Portsdown transmitter.

Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-band-decode-pic/ BATC shop - item 8].

===2-Way RF Switch===

Not required for Portsdown 4.

This switch allows you to route the outputs from the Portsdown 2017 Filter Modulator card and a LimeSDR to a single PA, enabling both to be used without reconfiguration. Full details on this Wiki page [[2-Way RF Switch]].

===Filters and PA drivers===

It is absolutely essential that the Portsdown transmitter output is followed by suitable bandpass filters.
These are not included as part of the project but a [[Filters|number of designs and suppliers are listed here.]]

===Output Attenuator===

Although NOT required when using the Lime Mini or Pluto SDR, the Portsdown can use an electronically switched attenuator to adjust the transmit drive level for each band. Attenuators based on the PE4302, HMC1119 or PE43703 (preferred) are supported.

[[File:PE43073 post-mod small.jpg|400px]]

These attenuators are available on eBay. Full details and wiring instructions are detailed here: [[Output Attenuator]].

Portsdown hardware

2022-01-03T10:14:26Z

G4FRE: /* LimeSDR */

This page describes all the hardware modules and interconnections required to build the Portsdown DATV system.

Not all the hardware is required before the transmitter can start to be tested – an incremental approach is described here to allow constructors to gain confidence as they assemble the parts.

===Raspberry Pi ===

The first item required is a standard Raspberry Pi - this can be a Pi 3 or Pi 4 depending upon the Portsdown version you are building. These are available from many suppliers and we suggest you just buy a Raspberry Pi without any additional boards or SD cards as you will be using specific Portsdown hardware and software. If you are starting a new build, the Raspberry Pi 4 Model B with 2 GB of RAM is recommended (4 GB or 8 GB or RAM will work, but costs more for no performance advantage).

The Raspberry Pi 4 can run hot, so using a heatsink case or fan to cool it is recommended.

===Power Supplies ===

You will also need a GOOD 3amp 5v power supply for the Raspberry Pi.

You should power a Pi 4 via the GPIO pins but always power a RPi 3 through the Micro-USB power connector to take advantage of the input protection provided. Use a very short USB cable to your power supply as most of these cables are of very poor quality and cause a significant voltage drop.

If you see a "Lightning Flash" symbol at the top right of your LCD display it means that the voltage at the RPi is too low. You can measure the voltage between the GPIO connector pins 4 and 6.

[[File:flash.jpg|200px]]

A lot of strange problems, such as the Portsdown running very slowly, can be caused by poor PSU volts - the RPi is actually specified for 5.1 volts, so make sure that your PSU delivers enough volts and current. See [https://forum.batc.org.uk/viewtopic.php?t=4856&p=11935#p11935 this post on the BATC forum] for a real user experience!

You may also need a 12 volt DC supply to power the other Portsdown components.

===Micro-SD Card===

You then need an SD card with the Portsdown software on it.

The easiest way is to buy a pre-programmed SD Card from the [https://batc.org.uk/shop/portsdown-transmitter-pre-programmed-sd-card/ BATC shop].

OR if you want to have a go at loading the software yourself you will need to or purchase a '''good quality card''' from another source and follow the instructions described [[Portsdown software|here]]. The 8 GB, 16 GB or 32 GB SanDisk Ultra (the red and grey one) is recommended - DO NOT use cheap copies.

===LCD Touchscreen===

The touchscreen is required to control the transmitter without the use of another computer.

'''Do not buy a touchscreen that connects through the RPi HDMI connector - it is NOT supported.'''

===7" Touchscreen===

The Portsdown 4 ONLY works with the Official Raspberry Pi 7" touchscreen (often referred to as a "7 inch Element 14 touchscreen"). The Portsdown 2020 works best with this screen, but can also use the 3.5 inch screen (below).

[[File:7_inch_screen.jpg|400px]]

Note that if you use the 7-inch screen, you do not need to connect the 3 data leads between the screen and the RPi - only ground and +5v.

===3.5" Touchscreen"===

'''Note this is NOT supported on the Portsdown 4.'''

The other supported touchscreen on Portsdown 2020 is a 3.5 inch diagonal Waveshare Raspberry Pi LCD (Model A, not Model B).

To mount the Waveshare screen away from the RPi, you could use this extension cable: https://thepihut.com/products/adafruit-gpio-extender-cable-for-raspberry-pi-model-a-b-26pin-12-long Just make sure that you triple-check the connections and pin orientation before connecting the screen. They do not tolerate incorrect connection as several of us have found out! Alternatively, you can make one yourself from a discarded 3.5 inch floppy drive and its lead.

Further information on screens can be found here [[Portsdown Displays]] and information on display resolutions can be found here [[Display Resolutions|PAL/NTSC and Display Resolutions]].

Mounting the Waveshare LCD Touchscreen can be a challenge! This 3D print design mounts it flat to the panel: https://www.thingiverse.com/thing:1941701
This 3D print design mounts it at an angle: https://www.thingiverse.com/thing:1920486.

Note that, when mounted, none of the touchscreen sensitive areas should be in contact with the surround.

===GPIO Extender Card===

In the completed unit, there are a number of signals that need to be routed in or out of the GPIO interface on the RPi. Plus we need to break out all 40 pins of the GPIO, and have another connector on top for the Waveshare LCD display (if used). Because of this the Portsdown team have designed a PCB for the job - the blank PCB for this is available from the BATC shop.

Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely.

[[File:screw t.jpg|400px]]

The BATC card is very simple to construct with no components other than plugs and sockets.

For full construction details and a list of suppliers for the plugs and sockets see [[GPIO breakout|the GPIO breakout page]]

You can buy the GPIO Extender Card blank PCB from the [https://batc.org.uk/shop/portsdown-transmitter-gpio-breakout-board-blank-pcb/ Portsdown section in the BATC shop - item 3]

===LimeSDR ===

The Portsdown system can use the LimeSDR Mini (or LimeSDR USB) to provide the modulator and RF generator functions.

[[File:LimeMini.jpg|400px]]

[[Using LimeSDR with Portsdown|See this page]] for more details on using the LimeSDR Mini in a Portsdown system.

===Pluto SDR===

The Portsdown 4 uses the Pluto SDR connected via the USB port to provide the modulator and RF generator functions.

See this page for more details: [[Portsdown_4_Pluto]]

----------------------

'''You now have the components for a fully working Portsdown transmitter!

---------------------

'''''However, you will need a camera and audio input to transmit pictures and sound.'''''

===Raspberry Pi Camera===

If you want to transmit live pictures you will need a camera. The standard Pi camera gives excellent results but will need mounting in a housing and does not have audio input.

Raspberry Pi Camera: CPC Farnell http://cpc.farnell.com/raspberry-pi/rpi-8mp-camera-board/raspberry-pi-camera-board-8mp/dp/SC14028

===Optional RPi camera Extension Lead Kit===

The RPi camera gives excellent results, but only comes with a short ribbon cable to connect it to the RPi.

It is possible to use some higher quality HDMI leads (the ground connections all need to be made) to extend the camera lead - this does NOT mean the signal out of the camera is HDMI, it is actually "Camera Serial Interface Type 2 (CSI-2)". We are just using HDMI cable as a useful extension lead.

Kits are available to connect a female HDMI connector to the RPi camera connector, and another female to the camera, allowing the use of domestic 1, 2 and 3m HDMI leads.

RPi Camera HDMI Lead Extension Kit: https://www.tindie.com/products/freto/pi-camera-hdmi-cable-extension/

There are 2 modifications that can be made to enable lower quality HDMI leads (those without all the ground connections made, or even the CEC wire on pin 13 missing) to be used. Full details of these modifications [[CSI-2 to HDMI|are available here.]]

===WebCams===

Some WebCams work with the Portsdown, but it has proved very difficult to support more than a few specific models. The Portsdown 2020 works with the older (pre-2019) versions of the Logitech C920. The Portsdown 4 works with all (3) versions of the C920 and with the Logitech C170. More details on webcams here [[Portsdown Webcams]].

===Composite Video Capture Device===

The transmitter is also capable of working with a USB-connected “EasyCap” dongle to capture PAL composite video from camcorders and analogue mixers etc.

There are at least 4 similar devices being marketed under this name on eBay, each with different chipsets, but only the Fushicai "USBTV007" brand is guaranteed to work.

[[File:Fushicai.JPG|200px]]

===Audio Capture Device===

eBay provides a good source for very cheap audio capture USB dongles, which can provide an audio input to go with the RPi camera. The audio capuure device must be of the type shown here:

[[File:04 USB Audio.png|200px]]

Other stand-alone USB audio capture devices may not work and the software will not be changed to support them. Please don't ask.

This type of audio capture device is also compatible with the Ryde DATV Receiver and the Langstone Microwave transceiver.

-----------------------------
'''That completes the basic Portsdown transmitter shopping list'''

---------------------
'''''However, the team has designed some additional components to enable you to build a complete DATV transmit system'''''

===RF Switching===

The complete RF switching arrangement illustrated below allows you to select the output from the Lime SDR or Pluto, adjust the exact level and then route the RF to any one of 8 PAs or transverters. All the blocks in the diagram are optional; however, you can build a very comprehensive system if you want to. Note that the 4-way decode and switch boards can be substituted for the 8-way decode and switch boards.

[[File:20190511 Portsdown RF Switching.jpg|600px]]

===4-Band RF Output Switch===

The Portsdown team have developed a 4-Band RF output switch capable of switching the low level output of the Lime Mini / Pluto to separate amplifiers for the 70, 144, 437 and 1255 MHz bands. Note: due to potential high insertion loss, it is not recommended to use the switch above 23cms.

[[File:Pd out SW.jpg|300px]]

Full details including parts list and schematic are available [[RF output switch|on this wiki page]].

===4-Band Decode Switch===

The Portsdown provides band switching and PTT outputs on the GPIO pins - these outputs need to be decoded to provide an output for each band.

[[File:Band decoder.JPG|200px]]

The Portsdown team have designed a simple board for switching between 4 bands and buffering the PTT signal which can be either constructed on 0.1” perforated board (veroboard) or on a PCB - this can be home etched.
Full details on the board including circuit etc [[PTT and band switching|are available here.]]
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-transmitter-4-band-decode-blank-pcb/ BATC shop - item 5].

===8-Band RF Output Switch===

For those of you who also want to drive Microwave transverters from your Portsdown, the team have developed an 8-Band RF output switch that includes an RF amplifier. It is designed to be used with the Output Attenuator (see below). It will be capable of amplifying the variable level from the attenuator and switching it to separate amplifiers for the 70, 144, 437 and 1255 MHz bands, and to 4 transverters for the higher bands. PCBs are on order and will be available from the BATC Shop.

Full details including parts list and schematic are available [[8-Band RF Output Switch|on this wiki page]].
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-way-rf-output-switch-blank-pcb/ BATC shop - item 9].

===8-Band Decoder===

This 8-band decoder is designed to work with the 8-band RF output switch and the Portsdown software. It will provide switching signals (either always on, or PTT activated) to 4 Power Amplifiers and 4 transverters, and it also enables you to set which VCO filter should be switched in for the 4 transverter outputs. PCBs are on order and will be available from the BATC Shop.

Full details on the board including circuit etc [[8-Band Decoder|are available here.]]
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-band-decode-blank-pcb/ BATC shop - item 7].

===8-Band Decode PIC===

This is the pre=programmed PIC to control the custom designed 8 band decode board for the Portsdown transmitter.

Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-band-decode-pic/ BATC shop - item 8].

===2-Way RF Switch===

Not required for Portsdown 4.

This switch allows you to route the outputs from the Portsdown 2017 Filter Modulator card and a LimeSDR to a single PA, enabling both to be used without reconfiguration. Full details on this Wiki page [[2-Way RF Switch]].

===Filters and PA drivers===

It is absolutely essential that the Portsdown transmitter output is followed by suitable bandpass filters.
These are not included as part of the project but a [[Filters|number of designs and suppliers are listed here.]]

===Output Attenuator===

Although NOT required when using the Lime Mini or Pluto SDR, the Portsdown can use an electronically switched attenuator to adjust the transmit drive level for each band. Attenuators based on the PE4302, HMC1119 or PE43703 (preferred) are supported.

[[File:PE43073 post-mod small.jpg|400px]]

These attenuators are available on eBay. Full details and wiring instructions are detailed here: [[Output Attenuator]].

Es'hail-2 Basic Information

2022-01-02T14:49:14Z

G4FRE: /* Aligning for DATV */

Oscar 100 is 2 amateur radio transponders hosted on the Es’hail-2 Direct Broadcast TV satellite owned by Es’hailSat in Qatar and is the first ever amateur payload on a commercial geostationary satellite

[[File:seperation.JPG|400px]]

The satellite was built by Mitsubishi Electric Company ( MELCO) in Japan and is a collaborative project with Es’hailSat / AMSAT-DL / Qatar ARS

For more details see this presentation given by G8GTZ and G8GKQ at the RSGB AGM 2019.

[[:File:RSGB AGM V2.pdf]]

==Aligning your dish==

The original step by step guide to setting up and aligning your dish to receive Es'hail-2 appeared in CQ-TV 261 contains good advice on setting up your dish and the direction of satellite and is available for download here: [[:Media:Getting ready for Es'hail2.pdf|Getting ready for Es'hail-2]]

However, now Oscar 100 is "on air" the advice about aligning your dish on BADR4 etc can be used alongside aligning the dish on the narrow band transponder.

More details on LNBs, including modifying the Octagon units for external lock can be found here: [[Es'hail-2_LNBs_and_Antennaes]]

====Narrow band transponder====

Use some SDR hardware (and a £10 RTL dongle will do) and something like the SDRconsole or SDR# programs set for 1 MHz bandwidth centered on 739 / 740MHz. Supply 12v to the LNB and look for a bump of around 500 kHz bandwidth.

This is the easiest way as there are no other signals in that band, set the elevation to ~ 26 degrees and gently scan across in Azimuth until you see the bump.

====Aligning for DATV====

The easiest way to align your dish for TVis to follow the guide below - note the BADR4 transponder containg BBC Arabic is Horizontal and requires 18v to the LNB - same as the Oscar 100 WB transponder - can be received on a MiniTiouner by tuning to 2246MHz with a 27500 SR.

You can then use the TV beacon to tweak for maximum signal - the types of MER you should receive depending on dish size are listed on the bottom of this page: https://wiki.batc.org.uk/Receiving_Oscar_100_DATV_signals

==Receiving Oscar 100 DATV signals==

A guide to receiving the DATV signals in the wideband transponder can be found here [[Receiving Oscar 100 DATV signals]]

==Transmitting DATV on Oscar 100==

A guide to transmitting DATV in the wideband transponder can be found here [[Transmitting Oscar 100 DATV signals]]

==List of Current Active Users==

[[QO100 DATV Users]]

Noise Source PSU

2021-12-05T20:56:20Z

G4FRE:

This simple unit is designed to switch a 28v (or 12v) supply for a Noise Source and be controlled by the Portsdown NF Meter. The input switching signal is 0v for the "off" state and 3.3v for the "on" state.

[[File:Noise Head PSU.jpg|437px]]

[[File:NF_Schematic_Extract.JPG|917px]]

The full schematic is here [[:Media:NoiseHeadPSU.pdf]]

The Bill of Materials is here. [[:File:NF Switch BOM.xlsx]]

===Design and Operation===

The Noise Source PSU has 4 distinct circuit functions:

====Voltage Step-up====

An eBay booster converter is used to derive a 33v supply from the incoming 12v. The actual input voltage is not critical, it should be in the range 5 - 25v. L1 and C1 reduce the amount of hash fed back down the supply line. FB1, R1 and C2 provide extra smoothing on the output. The potentiometer on the eBay booster converter should be set for 33v output if a 28v Noise Source is being used. If a 12v Noise Source is being used, the output should be set to 17v.

====Current Limiting====

The first LM317T (U2) is used to limit the current in the event of a short-circuit (or worse, connection of the output to a 50 ohm attenuator). R2 sets the current limit to 56ma, and C3 provides a low impedance input to the next stage.

Note that the early batch of PCBs had pins 1 and 2 (Adj and Vout) of U2 transposed; the modifications to the PCB to iorrect this are set out below. The unit will function without the modifications, but the current limit will not operate.

====Voltage Regulation====

The second LM317T (U3) regulates the output voltage to 28v. If jumper 1 is made, the output voltage is set to 12v.

====Switching====
Q1 is a p-channel mosfet and is used to switch the supply on and off. The switching signal (from GPIO pin 26 on the Portsdown Raspberry Pi 3 or 4) turns an NPN transistor on or off to switch the MOSFET. The exact types of transistors are not critical. The MOSFET should be able to handle 100ma and 30v. The NPN transistor needs to be able to handle 30v.

===Construction===

The PCB is designed to fit in a Die-cast box with a BNC for the output socket. This is the standard connector for commercial nNoise Sources. The input supply and switching is fed through a grommet into the box.

Note that none of the regulator or transistor tabs should be connected to the Die Cast box. If there is risk of them touching the box, then insulation tape or an insulating washer should be used to prevent this happening.

===Measured Performance===

The prototype drew 35 ma at 12v without a noise head connected, and 75ma with the noise head connected and permanently on. Average current drain during operation was about 55ma.

The current limiting was measured at 56ma; a typical noise head drwas 10ma.

===Error on the First Batch of PCBs===

The Initial batch of PCBs for the Noise source power supply had one error.
The Vout and Adj pins on the current-limiting LM317T (U2) were reversed.
The unit functions if assembled with the error, but the current limit will not work correctly.
To correct the error, the PCB should be modified as shown below, or pins 1 and 2 on U2 should be swapped.

[[File:Incorrect wiring.png|263px]] [[File:Correct wiring.png|268px]]

To modify the PCB, first cut the tracks 1 and 2 and scrape away the solder resist adjacent to the middle hole for U2 and the second cut. Then add wire link 3. Solder in U2 (LM317T) being careful not to displace the wire link. Then add wire link 5.

[[File:NF Switch PCB Mod.JPG|414px]]

After Modification:

[[File:Repair 1.jpg|489px]]

Cut track 1 and wire link 3

[[File:Repair 2.jpg|555px]]

Cut track 2 and wire link 5

Noise Source PSU

2021-12-05T20:55:16Z

G4FRE:

This simple unit is designed to switch a 28v (or 12v) supply for a Noise Source and be controlled by the Portsdown NF Meter. The input switching signal is 0v for the "off" state and 3.3v for the "on" state.

[[File:Noise Head PSU.jpg|437px]]

[[File:NF_Schematic_Extract.JPG|917px]]

The full schematic is here [[:Media:NoiseHeadPSU.pdf]]

The Bill of Materials is here. [[:File:NF Switch BOM.xlsx]]

===Design and Operation===

The Noise Source PSU has 4 distinct circuit functions:

====Voltage Step-up====

An eBay booster converter is used to derive a 33v supply from the incoming 12v. The actual input voltage is not critical, it should be in the range 5 - 25v. L1 and C1 reduce the amount of hash fed back down the supply line. FB1, R1 and C2 provide extra smoothing on the output. The potentiometer on the eBay booster converter should be set for 33v output if a 28v Noise Source is being used. If a 12v Noise Source is being used, the output should be set to 17v.

====Current Limiting====

The first LM317T (U2) is used to limit the current in the event of a short-circuit (or worse, connection of the output to a 50 ohm attenuator). R2 sets the current limit to 56ma, and C3 provides a low impedance input to the next stage.

Note that the early batch of PCBs had pins 1 and 2 (Adj and Vout) of U2 transposed; the modifications to the PCB to iorrect this are set out below. The unit will function without the modifications, but the current limit will not operate.

====Voltage Regulation====

The second LM317T (U3) regulates the output voltage to 28v. If jumper 1 is made, the output voltage is set to 12v.

====Switching====
Q1 is a p-channel mosfet and is used to switch the supply on and off. The switching signal (from GPIO pin 26 on the Portsdown Raspberry Pi 3 or 4) turns an NPN transistor on or off to switch the MOSFET. The exact types of transistors are not critical. The MOSFET should be able to handle 100ma and 30v. The NPN transistor needs to be able to handle 30v.

===Construction===

The PCB is designed to fit in a Die-cast box with a BNC for the output socket. This is the standard connector for commercial nNoise Sources. The input supply and switching is fed through a grommet into the box.

Note that none of the regulator or transistor tabs need should be connected to the Die Cast box. If there is risk of them touching the box, then insulation tape or an insulating washer should be used to prevent this happening.

===Measured Performance===

The prototype drew 35 ma at 12v without a noise head connected, and 75ma with the noise head connected and permanently on. Average current drain during operation was about 55ma.

The current limiting was measured at 56ma; a typical noise head drwas 10ma.

===Error on the First Batch of PCBs===

The Initial batch of PCBs for the Noise source power supply had one error.
The Vout and Adj pins on the current-limiting LM317T (U2) were reversed.
The unit functions if assembled with the error, but the current limit will not work correctly.
To correct the error, the PCB should be modified as shown below, or pins 1 and 2 on U2 should be swapped.

[[File:Incorrect wiring.png|263px]] [[File:Correct wiring.png|268px]]

To modify the PCB, first cut the tracks 1 and 2 and scrape away the solder resist adjacent to the middle hole for U2 and the second cut. Then add wire link 3. Solder in U2 (LM317T) being careful not to displace the wire link. Then add wire link 5.

[[File:NF Switch PCB Mod.JPG|414px]]

After Modification:

[[File:Repair 1.jpg|489px]]

Cut track 1 and wire link 3

[[File:Repair 2.jpg|555px]]

Cut track 2 and wire link 5

Portsdown NF Meter

2021-11-03T11:03:38Z

G4FRE: /* Measuring a transverter / rx converter */

The Portsdown 4 includes a Noise Figure Meter (STILL UNDER DEVELOPMENT) that uses the LimeSDR Mini and a user-provided noise source and custom switching power supply to provide an indication of the performance of preamps and transverters. It is hoped to describe this emerging capability in CQ-TV 274 (Winter 2021). This Wiki page is purely to inform the early beta testers before the capability goes on general release.

===General Principle===

The limiting factor on the performance of many microwave receivers and some VHF receivers is the amount of noise generated by the input stage of the receiver. G8GTZ discussed this in his excellent [https://www.youtube.com/watch?v=lfSi7vTQK44 CAT 21 Video] which is essential viewing before trying to use the Portsdown 4 Noise Figure Meter.

The input stage noise can be estimated by making comparisons between the receiver output with no input, and its output when connected a calibrated low-level noise source. This is the method used by the popular HP Noise Figure meters and the method used in the Portsdown. The noise source is permanently connected and switched on and off at about 10 Hz. The noise level at the output if the preamp/transverter is measured during the on and the off periods, averaged, and then the noise contribution of the receiver itself can be calculated.

The noise contribution from amateur preamps and transverters is normally stated as a logarithmic "Noise Figure" measured in dB. Levels around 3 dB are acceptable for VHF receivers (where there is a lot of atmospheric noise) whereas good microwave receivers typically achieve between 1 and 2 dB. Lower noise figures are desirable for EME and satellite use where the background noise is much lower. Lower noise figures may also be stated as a noise temperature. There is a direct logarithmic relationship betwen the two. This Wiki page provides a full explanation: https://en.wikipedia.org/wiki/Noise_temperature .

===Equipment Required===

To measure noise figure using the Portsdown 4, a Lime SDR Mini, calibrated noise source and matching switched power supply are required.

====Noise heads====

A noise head does exactly what it says - generates a known level of noise when supplied with a switched voltage controlled by the RPi 4 GPIO pin.

All noise heads have an "Excess Noise Ratio" (ENR) which is a measure of the noise that they produce. Professional units will have a calibration chart or table stating how this ENR varies with frequency. Typical ENR values are 5 or 15 dB.

The accuracy of the noise figure meter is limited by the accuracy of the noise source ENR calibration. However, an uncalibrated noise source can still provide a very valuable alignment aid.

If you do not have a calibrated HP or similar noise source, they are actually easy to build. This webpage has an easy to build design (but note it requires -9v switched supply) complete with expected ENR charts and a PCB design which is available to order from OSH Park http://www.janbob.com/electron/Noise/NoiseGen1.htm

Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart.

Alternatively, G8FEK of RF Design sells some suitable models: https://g8fek.com/precision-noise-sources.html . Note that both these precision noise sources need a 13.5 to 28V (30v absolute maximum) supply.

====Noise head PSU====

The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again.

Many professional noise sources (as used by HP) need a 28v supply in their on state.

The drive for the noise source switching comes from pin 26 of the Portsdown GPIO port, and is at 3.3v when the noise source is on, and 0v when the noise source is off.

It is hoped to publish some circuits for possible switched power supplies in future, but there is an example here: https://www.qsl.net/yo4hfu/Files/CANFI/SWITCH_28V.pdf . Simply replace the drive to the transistor from the USB module with Pin 26 of the Pi GPIO.

===Preparing for a Measurement===

Ensure you have the latest Portsdown software loaded (Version 202110300 published Nov 2nd 2021 or later) and connect your LimeSDR to the Portsdown by USB. Note - the LimeSDR should have gateware V1.30 or the LimeDVB gateware loaded.

Connect your switched power supply to pin 26 of the Portsdown GPIO.

Apply the switched power supply to the Noise Source and initially (assuming a 15 dB or 5 dB ENR noise source) connect the noise source directly to the LimeSDR Mini receive port.

From Menu 2, select Test Equipment, NF Meter. After the levels have settled (which may take 10 seconds or so) you should see the screen below.

[[File:nfmeter.jpg|400px]]

===Setup Menu===

This is the Set-up Menu. If all is working correctly, you should see 2 flickering lines on the band viewer window. The lower line is the detected noise with the noise source off, and the upper line is the detected noise with the noise source on.

====Setting the Measurement Frequency====

Press "Return to Main menu", "Freq and Bandwidth" and then "Centre Freq". Set your desired measurement frequency. Alternatively, you can use one of the presets (146.5, 437, 748, 1255 or 2409). Then select "Set-up Menu" again. The entered frequency should be the signal frequency if you are testing a preamp etc.

====Measurment bandwidth====

It is suggested that the measurement bandwidth is left at 2 MHz (as was standard on the early HP Noise Figure meters) but it can be adjusted down to 500 kHz and up to 20 MHz at this point.

====ENR====

Next, you need to enter the ENR of your noise source. Touch the ENR button and enter the exact ENR for your noise source at the selected frequency (read from its calibration chart).

====Lime gain====

Now, the gain of the LimeSDR needs to be adjusted so that it is operating in its linear region. Use the "Gain Up" and "Gain Down" buttons, so that the "Noise Off" level shown at the bottom left of the screen is between -65 dB and -55 dB. If set too low, the indication will change colour and a message advising an increase in Lime Gain will be displayed. If the gain is set too high, there is a risk that high gain preamps may overload the system when tested, leading to inaccurate readings.

The Meter will now display the Noise Figure of your LimeSDR. This is very dependent on screening and digital noise pickup, but should be in the range 5 dB to 10 dB between 146 and 1255 MHz.

===Measuring a transverter / rx converter===

When measuring a transverter '''the measurement frequency should be the IF frequency'''.

However, the '''ENR of the noise head should be for the signal frequency''', NOT the IF frequency.

Great care needs to be taken, by using IF filtering, to ensure no local oscillator signals are presented to the lime receiver

===Making a Simple Measurement===

If you now insert your preamp or transverter (the Device Under Test) between the noise source and the LimeSDR, you should see the "System" NF improve (hopefully) and you can make adjustments to your device to optimise its performance.

What is displayed on the NF Meter is the noise figure of the system comprising your device and the LimeSDR. This means that if your device has low gain, the LimeSDR might introduce a contribution to the total measured noise figure. However, this mode enables quick and easy optimisation, and is very useful for general bench testing.

===Measuring Gain and NF of a Preamp===

By calibrating the noise levels of the LimeSDR, it is then possible to calculate the Gain and NF of a preamp and exclude the NF contribution of the LimeSDR Mini. This procedure only works for one frequency and one Lime Gain setting, and needs to be repeated if frequency, Lime Gain or Bandwidth are altered.

Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.

To perform the calibration, connect the noise head directly to the LimeSDR, and set the frequency, bandwidth and gain as specified above. Then, in the Set-up Menu, press "Calibrate". The system will average a number of readings and then display the "Device" noise figure and gain, which should be around zero. Now put your preamp in circuit, and the meter will display the preamp (the "Device") noise figure and gain as shown below.

[[File:nfdevice.jpg|400px]]

Note that although this method can be made to work for transverters to give an indication of NF and gain, the values will not be accurate, as the NF Meter calibration will have occured at the IF frequency, not the signal frequency.

===Meter Scale===

The "analog" meter has 5 scale settings: a wide 30 to 0 dB, narrower 30 to 20 dB, 20 to 10 dB and 10 to 0 dB, and a narrow 5 t0 0 dB. You can move between these scales by touching the right or left side of the meter face. Note that the meter reads lower noise figure (better) to the right, and higher noise figure to the left. This is the convention followed on older analog Noise Figure meters.

===Sources of Error===

Interference in the passband. Not the DC spike - this is ignored.

Noise Source reflection coefficient changes between the on and off state.

SDR non-linearity

Temperature effects

===References:===

[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]

[https://g8fek.com/uploads/9/4/4/3/94435411/an57-2_5952-3706e_hp_nf_measurement_primer.pdf Agilent Application Note 57-2: Noise Figure Measurement Accuracy – The Y-Factor Method]

Portsdown NF Meter

2021-11-03T11:00:39Z

G4FRE: /* Equipment Required */

The Portsdown 4 includes a Noise Figure Meter (STILL UNDER DEVELOPMENT) that uses the LimeSDR Mini and a user-provided noise source and custom switching power supply to provide an indication of the performance of preamps and transverters. It is hoped to describe this emerging capability in CQ-TV 274 (Winter 2021). This Wiki page is purely to inform the early beta testers before the capability goes on general release.

===General Principle===

The limiting factor on the performance of many microwave receivers and some VHF receivers is the amount of noise generated by the input stage of the receiver. G8GTZ discussed this in his excellent [https://www.youtube.com/watch?v=lfSi7vTQK44 CAT 21 Video] which is essential viewing before trying to use the Portsdown 4 Noise Figure Meter.

The input stage noise can be estimated by making comparisons between the receiver output with no input, and its output when connected a calibrated low-level noise source. This is the method used by the popular HP Noise Figure meters and the method used in the Portsdown. The noise source is permanently connected and switched on and off at about 10 Hz. The noise level at the output if the preamp/transverter is measured during the on and the off periods, averaged, and then the noise contribution of the receiver itself can be calculated.

The noise contribution from amateur preamps and transverters is normally stated as a logarithmic "Noise Figure" measured in dB. Levels around 3 dB are acceptable for VHF receivers (where there is a lot of atmospheric noise) whereas good microwave receivers typically achieve between 1 and 2 dB. Lower noise figures are desirable for EME and satellite use where the background noise is much lower. Lower noise figures may also be stated as a noise temperature. There is a direct logarithmic relationship betwen the two. This Wiki page provides a full explanation: https://en.wikipedia.org/wiki/Noise_temperature .

===Equipment Required===

To measure noise figure using the Portsdown 4, a Lime SDR Mini, calibrated noise source and matching switched power supply are required.

====Noise heads====

A noise head does exactly what it says - generates a known level of noise when supplied with a switched voltage controlled by the RPi 4 GPIO pin.

All noise heads have an "Excess Noise Ratio" (ENR) which is a measure of the noise that they produce. Professional units will have a calibration chart or table stating how this ENR varies with frequency. Typical ENR values are 5 or 15 dB.

The accuracy of the noise figure meter is limited by the accuracy of the noise source ENR calibration. However, an uncalibrated noise source can still provide a very valuable alignment aid.

If you do not have a calibrated HP or similar noise source, they are actually easy to build. This webpage has an easy to build design (but note it requires -9v switched supply) complete with expected ENR charts and a PCB design which is available to order from OSH Park http://www.janbob.com/electron/Noise/NoiseGen1.htm

Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart.

Alternatively, G8FEK of RF Design sells some suitable models: https://g8fek.com/precision-noise-sources.html . Note that both these precision noise sources need a 13.5 to 28V (30v absolute maximum) supply.

====Noise head PSU====

The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again.

Many professional noise sources (as used by HP) need a 28v supply in their on state.

The drive for the noise source switching comes from pin 26 of the Portsdown GPIO port, and is at 3.3v when the noise source is on, and 0v when the noise source is off.

It is hoped to publish some circuits for possible switched power supplies in future, but there is an example here: https://www.qsl.net/yo4hfu/Files/CANFI/SWITCH_28V.pdf . Simply replace the drive to the transistor from the USB module with Pin 26 of the Pi GPIO.

===Preparing for a Measurement===

Ensure you have the latest Portsdown software loaded (Version 202110300 published Nov 2nd 2021 or later) and connect your LimeSDR to the Portsdown by USB. Note - the LimeSDR should have gateware V1.30 or the LimeDVB gateware loaded.

Connect your switched power supply to pin 26 of the Portsdown GPIO.

Apply the switched power supply to the Noise Source and initially (assuming a 15 dB or 5 dB ENR noise source) connect the noise source directly to the LimeSDR Mini receive port.

From Menu 2, select Test Equipment, NF Meter. After the levels have settled (which may take 10 seconds or so) you should see the screen below.

[[File:nfmeter.jpg|400px]]

===Setup Menu===

This is the Set-up Menu. If all is working correctly, you should see 2 flickering lines on the band viewer window. The lower line is the detected noise with the noise source off, and the upper line is the detected noise with the noise source on.

====Setting the Measurement Frequency====

Press "Return to Main menu", "Freq and Bandwidth" and then "Centre Freq". Set your desired measurement frequency. Alternatively, you can use one of the presets (146.5, 437, 748, 1255 or 2409). Then select "Set-up Menu" again. The entered frequency should be the signal frequency if you are testing a preamp etc.

====Measurment bandwidth====

It is suggested that the measurement bandwidth is left at 2 MHz (as was standard on the early HP Noise Figure meters) but it can be adjusted down to 500 kHz and up to 20 MHz at this point.

====ENR====

Next, you need to enter the ENR of your noise source. Touch the ENR button and enter the exact ENR for your noise source at the selected frequency (read from its calibration chart).

====Lime gain====

Now, the gain of the LimeSDR needs to be adjusted so that it is operating in its linear region. Use the "Gain Up" and "Gain Down" buttons, so that the "Noise Off" level shown at the bottom left of the screen is between -65 dB and -55 dB. If set too low, the indication will change colour and a message advising an increase in Lime Gain will be displayed. If the gain is set too high, there is a risk that high gain preamps may overload the system when tested, leading to inaccurate readings.

The Meter will now display the Noise Figure of your LimeSDR. This is very dependent on screening and digital noise pickup, but should be in the range 5 dB to 10 dB between 146 and 1255 MHz.

===Measuring a transverter / rx converter===

When measuring a transverter '''the measurement frequency should be the IF frequency'''.

However, the '''ENR of the noise head should be for the signal frequency''', NOT the IF frequency.

===Making a Simple Measurement===

If you now insert your preamp or transverter (the Device Under Test) between the noise source and the LimeSDR, you should see the "System" NF improve (hopefully) and you can make adjustments to your device to optimise its performance.

What is displayed on the NF Meter is the noise figure of the system comprising your device and the LimeSDR. This means that if your device has low gain, the LimeSDR might introduce a contribution to the total measured noise figure. However, this mode enables quick and easy optimisation, and is very useful for general bench testing.

===Measuring Gain and NF of a Preamp===

By calibrating the noise levels of the LimeSDR, it is then possible to calculate the Gain and NF of a preamp and exclude the NF contribution of the LimeSDR Mini. This procedure only works for one frequency and one Lime Gain setting, and needs to be repeated if frequency, Lime Gain or Bandwidth are altered.

Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.

To perform the calibration, connect the noise head directly to the LimeSDR, and set the frequency, bandwidth and gain as specified above. Then, in the Set-up Menu, press "Calibrate". The system will average a number of readings and then display the "Device" noise figure and gain, which should be around zero. Now put your preamp in circuit, and the meter will display the preamp (the "Device") noise figure and gain as shown below.

[[File:nfdevice.jpg|400px]]

Note that although this method can be made to work for transverters to give an indication of NF and gain, the values will not be accurate, as the NF Meter calibration will have occured at the IF frequency, not the signal frequency.

===Meter Scale===

The "analog" meter has 5 scale settings: a wide 30 to 0 dB, narrower 30 to 20 dB, 20 to 10 dB and 10 to 0 dB, and a narrow 5 t0 0 dB. You can move between these scales by touching the right or left side of the meter face. Note that the meter reads lower noise figure (better) to the right, and higher noise figure to the left. This is the convention followed on older analog Noise Figure meters.

===Sources of Error===

Interference in the passband. Not the DC spike - this is ignored.

Noise Source reflection coefficient changes between the on and off state.

SDR non-linearity

Temperature effects

===References:===

[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]

[https://g8fek.com/uploads/9/4/4/3/94435411/an57-2_5952-3706e_hp_nf_measurement_primer.pdf Agilent Application Note 57-2: Noise Figure Measurement Accuracy – The Y-Factor Method]

Portsdown NF Meter

2021-11-03T10:59:31Z

G4FRE:

The Portsdown 4 includes a Noise Figure Meter (STILL UNDER DEVELOPMENT) that uses the LimeSDR Mini and a user-provided noise source and custom switching power supply to provide an indication of the performance of preamps and transverters. It is hoped to describe this emerging capability in CQ-TV 274 (Winter 2021). This Wiki page is purely to inform the early beta testers before the capability goes on general release.

===General Principle===

The limiting factor on the performance of many microwave receivers and some VHF receivers is the amount of noise generated by the input stage of the receiver. G8GTZ discussed this in his excellent [https://www.youtube.com/watch?v=lfSi7vTQK44 CAT 21 Video] which is essential viewing before trying to use the Portsdown 4 Noise Figure Meter.

The input stage noise can be estimated by making comparisons between the receiver output with no input, and its output when connected a calibrated low-level noise source. This is the method used by the popular HP Noise Figure meters and the method used in the Portsdown. The noise source is permanently connected and switched on and off at about 10 Hz. The noise level at the output if the preamp/transverter is measured during the on and the off periods, averaged, and then the noise contribution of the receiver itself can be calculated.

The noise contribution from amateur preamps and transverters is normally stated as a logarithmic "Noise Figure" measured in dB. Levels around 3 dB are acceptable for VHF receivers (where there is a lot of atmospheric noise) whereas good microwave receivers typically achieve between 1 and 2 dB. Lower noise figures are desirable for EME and satellite use where the background noise is much lower. Lower noise figures may also be stated as a noise temperature. There is a direct logarithmic relationship betwen the two. This Wiki page provides a full explanation: https://en.wikipedia.org/wiki/Noise_temperature .

===Equipment Required===

To measure noise figure using the Portsdown 4, a Lime SDR Mini, calibrated noise source and matching switched power supply are required.

====Noise heads====

A noise head does exactly what it says - generates a known level of noise when supplied with a switched voltage controlled by the RPi 4 GPIO pin.

All noise heads have an "Excess Noise Ratio" (ENR) which is a measure of the noise that they produce. Professional units will have a calibration chart or table stating how this ENR varies with frequency. Typical ENR values are 5 or 15 dB.

The accuracy of the noise figure meter is limited by the accuracy of the noise source ENR calibration. However, an uncalibrated noise source can still provide a very valuable alignment aid.

If you do not have a calibrated HP or similar noise source, they are actually easy to build. This webpage has an easy to build design (but note it requires -9v switched supply) complete with expected ENR charts and a PCB design which is available to order from OSH Park http://www.janbob.com/electron/Noise/NoiseGen1.htm

Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart.

Alternatively, G8FEK of RF Design sells some suitable models: https://g8fek.com/precision-noise-sources.html . Note that both these precision noise sources need a 28V (30v absolute maximum) supply.

====Noise head PSU====

The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again.

Many professional noise sources (as used by HP) need a 28v supply in their on state.

The drive for the noise source switching comes from pin 26 of the Portsdown GPIO port, and is at 3.3v when the noise source is on, and 0v when the noise source is off.

It is hoped to publish some circuits for possible switched power supplies in future, but there is an example here: https://www.qsl.net/yo4hfu/Files/CANFI/SWITCH_28V.pdf . Simply replace the drive to the transistor from the USB module with Pin 26 of the Pi GPIO.

===Preparing for a Measurement===

Ensure you have the latest Portsdown software loaded (Version 202110300 published Nov 2nd 2021 or later) and connect your LimeSDR to the Portsdown by USB. Note - the LimeSDR should have gateware V1.30 or the LimeDVB gateware loaded.

Connect your switched power supply to pin 26 of the Portsdown GPIO.

Apply the switched power supply to the Noise Source and initially (assuming a 15 dB or 5 dB ENR noise source) connect the noise source directly to the LimeSDR Mini receive port.

From Menu 2, select Test Equipment, NF Meter. After the levels have settled (which may take 10 seconds or so) you should see the screen below.

[[File:nfmeter.jpg|400px]]

===Setup Menu===

This is the Set-up Menu. If all is working correctly, you should see 2 flickering lines on the band viewer window. The lower line is the detected noise with the noise source off, and the upper line is the detected noise with the noise source on.

====Setting the Measurement Frequency====

Press "Return to Main menu", "Freq and Bandwidth" and then "Centre Freq". Set your desired measurement frequency. Alternatively, you can use one of the presets (146.5, 437, 748, 1255 or 2409). Then select "Set-up Menu" again. The entered frequency should be the signal frequency if you are testing a preamp etc.

====Measurment bandwidth====

It is suggested that the measurement bandwidth is left at 2 MHz (as was standard on the early HP Noise Figure meters) but it can be adjusted down to 500 kHz and up to 20 MHz at this point.

====ENR====

Next, you need to enter the ENR of your noise source. Touch the ENR button and enter the exact ENR for your noise source at the selected frequency (read from its calibration chart).

====Lime gain====

Now, the gain of the LimeSDR needs to be adjusted so that it is operating in its linear region. Use the "Gain Up" and "Gain Down" buttons, so that the "Noise Off" level shown at the bottom left of the screen is between -65 dB and -55 dB. If set too low, the indication will change colour and a message advising an increase in Lime Gain will be displayed. If the gain is set too high, there is a risk that high gain preamps may overload the system when tested, leading to inaccurate readings.

The Meter will now display the Noise Figure of your LimeSDR. This is very dependent on screening and digital noise pickup, but should be in the range 5 dB to 10 dB between 146 and 1255 MHz.

===Measuring a transverter / rx converter===

When measuring a transverter '''the measurement frequency should be the IF frequency'''.

However, the '''ENR of the noise head should be for the signal frequency''', NOT the IF frequency.

===Making a Simple Measurement===

If you now insert your preamp or transverter (the Device Under Test) between the noise source and the LimeSDR, you should see the "System" NF improve (hopefully) and you can make adjustments to your device to optimise its performance.

What is displayed on the NF Meter is the noise figure of the system comprising your device and the LimeSDR. This means that if your device has low gain, the LimeSDR might introduce a contribution to the total measured noise figure. However, this mode enables quick and easy optimisation, and is very useful for general bench testing.

===Measuring Gain and NF of a Preamp===

By calibrating the noise levels of the LimeSDR, it is then possible to calculate the Gain and NF of a preamp and exclude the NF contribution of the LimeSDR Mini. This procedure only works for one frequency and one Lime Gain setting, and needs to be repeated if frequency, Lime Gain or Bandwidth are altered.

Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.

To perform the calibration, connect the noise head directly to the LimeSDR, and set the frequency, bandwidth and gain as specified above. Then, in the Set-up Menu, press "Calibrate". The system will average a number of readings and then display the "Device" noise figure and gain, which should be around zero. Now put your preamp in circuit, and the meter will display the preamp (the "Device") noise figure and gain as shown below.

[[File:nfdevice.jpg|400px]]

Note that although this method can be made to work for transverters to give an indication of NF and gain, the values will not be accurate, as the NF Meter calibration will have occured at the IF frequency, not the signal frequency.

===Meter Scale===

The "analog" meter has 5 scale settings: a wide 30 to 0 dB, narrower 30 to 20 dB, 20 to 10 dB and 10 to 0 dB, and a narrow 5 t0 0 dB. You can move between these scales by touching the right or left side of the meter face. Note that the meter reads lower noise figure (better) to the right, and higher noise figure to the left. This is the convention followed on older analog Noise Figure meters.

===Sources of Error===

Interference in the passband. Not the DC spike - this is ignored.

Noise Source reflection coefficient changes between the on and off state.

SDR non-linearity

Temperature effects

===References:===

[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]

[https://g8fek.com/uploads/9/4/4/3/94435411/an57-2_5952-3706e_hp_nf_measurement_primer.pdf Agilent Application Note 57-2: Noise Figure Measurement Accuracy – The Y-Factor Method]

Portsdown NF Meter

2021-11-03T10:54:29Z

G4FRE: /* Noise heads */

The Portsdown 4 includes a Noise Figure Meter (STILL UNDER DEVELOPMENT) that uses the LimeSDR Mini and a user-provided noise source and custom switching power supply to provide an indication of the performance of preamps and transverters. It is hoped to describe this emerging capability in CQ-TV 274 (Winter 2021). This Wiki page is purely to inform the early beta testers before the capability goes on general release.

===General Principle===

The limiting factor on the performance of many microwave receivers and some VHF receivers is the amount of noise generated by the input stage of the receiver. G8GTZ discussed this in his excellent [https://www.youtube.com/watch?v=lfSi7vTQK44 CAT 21 Video] which is essential viewing before trying to use the Portsdown 4 Noise Figure Meter.

The input stage noise can be estimated by making comparisons between the receiver output with no input, and its output when connected a calibrated low-level noise source. This is the method used by the popular HP Noise Figure meters and the method used in the Portsdown. The noise source is permanently connected and switched on and off at about 10 Hz. The noise level at the output if the preamp/transverter is measured during the on and the off periods, averaged, and then the noise contribution of the receiver itself can be calculated.

The noise contribution from amateur preamps and transverters is normally stated as a logarithmic "Noise Figure" measured in dB. Levels around 3 dB are acceptable for VHF receivers (where there is a lot of atmospheric noise) whereas good microwave receivers typically achieve between 1 and 2 dB. Lower noise figures are desirable for EME and satellite use where the background noise is much lower. Lower noise figures may also be stated as a noise temperature. There is a direct logarithmic relationship betwen the two. This Wiki page provides a full explanation: https://en.wikipedia.org/wiki/Noise_temperature .

===Equipment Required===

To measure noise figure using the Portsdown 4, a Lime SDR Mini, calibrated noise source and matching switched power supply are required.

====Noise heads====

A noise head does exactly what it says - generates a known level of noise when supplied with a switched voltage controlled by the RPi 4 GPIO pin.

All noise heads have an "Excess Noise Ratio" (ENR) which is a measure of the noise that they produce. Professional units will have a calibration chart or table stating how this ENR varies with frequency. Typical ENR values are 5 or 15 dB.

The accuracy of the noise figure meter is limited by the accuracy of the noise source ENR calibration. However, an uncalibrated noise source can still provide a very valuable alignment aid.

If you do not have a calibrated HP or similar noise source, they are actually easy to build. This webpage has an easy to build design (but note it requires -9v switched supply) complete with expected ENR charts and a PCB design which is available to order from OSH Park http://www.janbob.com/electron/Noise/NoiseGen1.htm

Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart.

Alternatively, G8FEK of RF Design sells some suitable models: https://g8fek.com/precision-noise-sources.html . Note that these need a 30v, not 28v, supply.

====Noise head PSU====

The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again.

Many professional noise sources (as used by HP) need a 28v supply in their on state.

The drive for the noise source switching comes from pin 26 of the Portsdown GPIO port, and is at 3.3v when the noise source is on, and 0v when the noise source is off.

It is hoped to publish some circuits for possible switched power supplies in future, but there is an example here: https://www.qsl.net/yo4hfu/Files/CANFI/SWITCH_28V.pdf . Simply replace the drive to the transistor from the USB module with Pin 26 of the Pi GPIO.

===Preparing for a Measurement===

Ensure you have the latest Portsdown software loaded (Version 202110300 published Nov 2nd 2021 or later) and connect your LimeSDR to the Portsdown by USB. Note - the LimeSDR should have gateware V1.30 or the LimeDVB gateware loaded.

Connect your switched power supply to pin 26 of the Portsdown GPIO.

Apply the switched power supply to the Noise Source and initially (assuming a 15 dB or 5 dB ENR noise source) connect the noise source directly to the LimeSDR Mini receive port.

From Menu 2, select Test Equipment, NF Meter. After the levels have settled (which may take 10 seconds or so) you should see the screen below.

[[File:nfmeter.jpg|400px]]

===Setup Menu===

This is the Set-up Menu. If all is working correctly, you should see 2 flickering lines on the band viewer window. The lower line is the detected noise with the noise source off, and the upper line is the detected noise with the noise source on.

====Setting the Measurement Frequency====

Press "Return to Main menu", "Freq and Bandwidth" and then "Centre Freq". Set your desired measurement frequency. Alternatively, you can use one of the presets (146.5, 437, 748, 1255 or 2409). Then select "Set-up Menu" again. The entered frequency should be the signal frequency if you are testing a preamp etc.

====Measurment bandwidth====

It is suggested that the measurement bandwidth is left at 2 MHz (as was standard on the early HP Noise Figure meters) but it can be adjusted down to 500 kHz and up to 20 MHz at this point.

====ENR====

Next, you need to enter the ENR of your noise source. Touch the ENR button and enter the exact ENR for your noise source at the selected frequency (read from its calibration chart).

====Lime gain====

Now, the gain of the LimeSDR needs to be adjusted so that it is operating in its linear region. Use the "Gain Up" and "Gain Down" buttons, so that the "Noise Off" level shown at the bottom left of the screen is between -65 dB and -55 dB. If set too low, the indication will change colour and a message advising an increase in Lime Gain will be displayed. If the gain is set too high, there is a risk that high gain preamps may overload the system when tested, leading to inaccurate readings.

The Meter will now display the Noise Figure of your LimeSDR. This is very dependent on screening and digital noise pickup, but should be in the range 5 dB to 10 dB between 146 and 1255 MHz.

===Measuring a transverter / rx converter===

When measuring a transverter '''the measurement frequency should be the IF frequency'''.

However, the '''ENR of the noise head should be for the signal frequency''', NOT the IF frequency.

===Making a Simple Measurement===

If you now insert your preamp or transverter (the Device Under Test) between the noise source and the LimeSDR, you should see the "System" NF improve (hopefully) and you can make adjustments to your device to optimise its performance.

What is displayed on the NF Meter is the noise figure of the system comprising your device and the LimeSDR. This means that if your device has low gain, the LimeSDR might introduce a contribution to the total measured noise figure. However, this mode enables quick and easy optimisation, and is very useful for general bench testing.

===Measuring Gain and NF of a Preamp===

By calibrating the noise levels of the LimeSDR, it is then possible to calculate the Gain and NF of a preamp and exclude the NF contribution of the LimeSDR Mini. This procedure only works for one frequency and one Lime Gain setting, and needs to be repeated if frequency, Lime Gain or Bandwidth are altered.

Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.

To perform the calibration, connect the noise head directly to the LimeSDR, and set the frequency, bandwidth and gain as specified above. Then, in the Set-up Menu, press "Calibrate". The system will average a number of readings and then display the "Device" noise figure and gain, which should be around zero. Now put your preamp in circuit, and the meter will display the preamp (the "Device") noise figure and gain as shown below.

[[File:nfdevice.jpg|400px]]

Note that although this method can be made to work for transverters to give an indication of NF and gain, the values will not be accurate, as the NF Meter calibration will have occured at the IF frequency, not the signal frequency.

===Meter Scale===

The "analog" meter has 5 scale settings: a wide 30 to 0 dB, narrower 30 to 20 dB, 20 to 10 dB and 10 to 0 dB, and a narrow 5 t0 0 dB. You can move between these scales by touching the right or left side of the meter face. Note that the meter reads lower noise figure (better) to the right, and higher noise figure to the left. This is the convention followed on older analog Noise Figure meters.

===Sources of Error===

Interference in the passband. Not the DC spike - this is ignored.

Noise Source reflection coefficient changes between the on and off state.

SDR non-linearity

Temperature effects

===References:===

[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]

[https://g8fek.com/uploads/9/4/4/3/94435411/an57-2_5952-3706e_hp_nf_measurement_primer.pdf Agilent Application Note 57-2: Noise Figure Measurement Accuracy – The Y-Factor Method]

2018 - 2023 CQ-TV 261 to CQ-TV 280

2021-10-31T11:49:11Z

G4FRE: /* Issue 263 Spring 2019 */

Copies of CQ-TV more than 2 years old are free to download at https://batc.org.uk/cq-tv/cq-tv-archive/

=====Issue 267 Spring 2020=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|One Year of Operation for the Goonhilly WebSDRs for QO-100
|8
|-
|Neat Housing for the Portsdown 7-Inch Screen with Pi Camera
|9
|-
|ATV repeater PI6ATS
|10
|-
|Electronic push button on-off switch for the Portsdown
|12
|-
|DATV Activity in North Northamptonshire
|13
|-
|CQ-TV, the BATC and you, our members
|14
|-
|A new controller for VK2RTS
|15
|-
|Don Saunders, G0WFT - silent key
|18
|-
|DATV repeater receiver with active video switch
|19
|-
|BBC MCR21’s Sound Mixer Desk and audio systems
|21
|-
|Remote Repeater and Station Monitoring with Modbus (Part 1)
|23
|-
|Video production with a smartphone part two
|27
|-
|Revived Terrestrial Activity
|28
|-
|Portsdown Newsletter
|29
|-
|A 10 Watt Linear Amplifier for 70cms DATV or narrowband modes
|30
|-
|A compact 12 volt Beam Antenna rotator
|31
|-
|Turning Back the Pages - CQ-TV 78
|32
|}

=====Issue 266 Winter 2019=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|A New Repeater Transmission Standard for the 2020s
|9
|-
|BATC report to the RSGB Spectrum Forum
|12
|-
|ADALM-PLUTO DATV TX – “How To”
|14
|-
|A 30 watt driver amplifier for 2.4 GHz
|19
|-
|Out portable for the BATC November Activity weekend
|21
|-
|5.6 GHz TV Receiver
|22
|-
|Using the Jetson Nano with the LongMynd software
|25
|-
|GB3ET Repeater
|27
|-
|Video Fundamentals 20 - Outside Broadcast Vans
|28
|-
|Portsdown Newsletter
|30
|-
|25 MHz reference, biasT and diplexer for QO-100
|31
|-
|The Secret Life of a TV Repeater
|33
|-
|Jamboree on the Air and QO-100
|35
|-
|CAT 19 South - a short report
|36
|-
|Turning Back the Pages
|37
|-
|DATV at the SDR Makerspace Conference
|39
|}

=====Issue 265 Autumn 2019=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|The BATC bursary scheme
|7
|-
|IARU Region 1 ATV Contest 2019 Results
|8
|-
|OBS and the Portsdown
|10
|-
|Using Mitsubishi MOSFET power modules with PE1RKI kits
|13
|-
|Telling the Story of MCR21
|16
|-
|Video Fundamentals 19
|18
|-
|The Jetson NanoBox
|20
|-
|LNB power supply with current limit for MiniTiouner
|22
|-
|A 250 Watt amplifier for Es’Hail-2 DATV
|23
|-
|Portsdown Newsletter
|26
|-
|The RSGB filming a new promotional video
|27
|-
|The LimeNET Micro – a Single-board DATV Transmitter
|28
|-
|Spectrum Matters
|29
|-
|The LongMynd Receiver on the Portsdown
|30
|-
|The LongMynd Receiver
|32
|-
|The G4WIM PA controller
|34
|-
|Turning Back the Pages - a 70 year special!
|39
|-
|ATV at Chalon-sur-Saone fayre
|43
|}

=====Issue 264 Summer 2019=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|BATC stand, Blackpool 2018 & 2019
|8
|-
|BATC Members’ Shop Update
|9
|-
|MCR21 Project Launch
|12
|-
|23 cm QRM
|13
|-
|Protecting Your LimeSDR Mini
|14
|-
|Portsdown Made Simple
|15
|-
|How to use K7FRY’s 10 Character Locator Website
|16
|-
|Dual channel output for the BATC version 2 MiniTiouner PCB
|17
|-
|KITTENS 19 & KITTENS 19 Activity Day
|19
|-
|Goonhilly Spectrum Monitor and WebSDR Maintenance Visit
|21
|-
|Video Fundamentals 18
|22
|-
|BATC at the Kempton Park Rally
|23
|-
|A very cheap easy to make Sync detector for
analogue video
|24
|-
|Well, I tried… 5.8GHz ATV
|25
|-
|Video Production - with a smartphone! Part 1.
|26
|-
|Turning Back the Pages - CQ-TV 76
|28
|-
|MCR21 Recording its History
|31
|-
|BATC at the Newbury Rally 2019
|31
|}

=====Issue 263 Spring 2019=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|OSCAR- 100 has arrived!
|9
|-
|Receiving QO-100
|10
|-
|Transmitting Systems for QO-100 on Es’hail-2
|12
|-
|G8LES Spectrian Amplifier mods for 2.3-2.4GHz
|15
|-
|Portsdown Newsletter
|17
|-
|Bias and reference injection board
|19
|-
|Easy Hole Plating at Home
|21
|-
|New DATV record on 76 GHz
|24
|-
|Bristol Mini-CAT
|24
|-
|MCR21 Progress
|25
|-
|The old and new models of the Octagon Twin LNB
|26
|-
|Route du Rhum
|26
|-
|Cheap Ebay Bias Tee
|27
|-
|Experiments with baseband digital video
|28
|-
|A New Audio Mixer for GB3KM
|32
|-
|BATC Website Incident
|33
|-
|Video Fundamentals 17
|34
|-
|3D Printed horn antennas - Part 2
|35
|-
|Simple dual band dish feed for Es’hail-2 (POTY)
|37
|-
|Turning Back the Pages - CQ-TV 75
|41
|}

=====Issue 262 Winter 2018=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|BATC report to the RSGB Spectrum Forum
|11
|-
|BATC response to WRC Agenda Item 1.1
|12
|-
|The story behind Es’hail-2
|13
|-
|Portsdown Support for the LimeSDR
|15
|-
|Sydney Amateur Television goes 5.6 GHz
|18
|-
|We were there at the launch of Es’Hail-2!
|20
|-
|A 23cm Power Amplifier For Digital ATV
|22
|-
|Portsdown Newsletter
|25
|-
|I bought a 3-D printer
|27
|-
|DVB-S DATV signal power measurement
|29
|-
|Low band DATV
|30
|-
|DATV on 24cms
|31
|-
|Measuring Power on 5.6 GHz & a New Receiver
|33
|-
|Baliu RB-TV in Catalonia
|35
|-
|DATV over optical - Part 2: interfacing the two
|36
|-
|Video Fundamentals 16 - Aspect Ratio re-visited
|40
|-
|Turning Back the Pages - CQ-TV 74
|41
|}

=====Issue 261 Autumn 2018=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|Touchscreen control of the DATV Express – part 2
|9
|-
|CAT18 award presentations and prizes
|10
|-
|BATC Test Equipment
|11
|-
|Microwave roundtable construction competition winners
|11
|-
|A Handy Signal Generator for 10GHz
|12
|-
|Es’Hail-2 launching soon!
|14
|-
|The Future of CAT
|15
|-
|ATV Workshop in Shropshire
|16
|-
|Portsdown Newsletter
|17
|-
|DATV over optical – an introduction
|19
|-
|CAT18 Report
|21
|-
|BATC at Goonhilly
|25
|-
|Video Fundamentals 15 - Wire, labelling & MCR21
|26
|-
|Es’hail-2 Wideband Transponder
|28
|-
|BATC members and DATV in Spain
|29
|-
|Getting ready to receive Es’hail-2
|30
|-
|BATC Awards Presentations at CAT18
|33
|-
|Never mind the width - look at the quality
|34
|-
|David Ellis Jones B.Sc, ALCM. GW8PBX (SK)
|35
|-
|Locking the Octagon PLL LNB to an external reference
|36
|-
|Turning Back the Pages - CQ-TV 73
|37
|}

2018 - 2023 CQ-TV 261 to CQ-TV 280

2021-10-31T11:48:54Z

G4FRE: /* Issue 263 Spring 2019 */

Copies of CQ-TV more than 2 years old are free to download at https://batc.org.uk/cq-tv/cq-tv-archive/

=====Issue 267 Spring 2020=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|One Year of Operation for the Goonhilly WebSDRs for QO-100
|8
|-
|Neat Housing for the Portsdown 7-Inch Screen with Pi Camera
|9
|-
|ATV repeater PI6ATS
|10
|-
|Electronic push button on-off switch for the Portsdown
|12
|-
|DATV Activity in North Northamptonshire
|13
|-
|CQ-TV, the BATC and you, our members
|14
|-
|A new controller for VK2RTS
|15
|-
|Don Saunders, G0WFT - silent key
|18
|-
|DATV repeater receiver with active video switch
|19
|-
|BBC MCR21’s Sound Mixer Desk and audio systems
|21
|-
|Remote Repeater and Station Monitoring with Modbus (Part 1)
|23
|-
|Video production with a smartphone part two
|27
|-
|Revived Terrestrial Activity
|28
|-
|Portsdown Newsletter
|29
|-
|A 10 Watt Linear Amplifier for 70cms DATV or narrowband modes
|30
|-
|A compact 12 volt Beam Antenna rotator
|31
|-
|Turning Back the Pages - CQ-TV 78
|32
|}

=====Issue 266 Winter 2019=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|A New Repeater Transmission Standard for the 2020s
|9
|-
|BATC report to the RSGB Spectrum Forum
|12
|-
|ADALM-PLUTO DATV TX – “How To”
|14
|-
|A 30 watt driver amplifier for 2.4 GHz
|19
|-
|Out portable for the BATC November Activity weekend
|21
|-
|5.6 GHz TV Receiver
|22
|-
|Using the Jetson Nano with the LongMynd software
|25
|-
|GB3ET Repeater
|27
|-
|Video Fundamentals 20 - Outside Broadcast Vans
|28
|-
|Portsdown Newsletter
|30
|-
|25 MHz reference, biasT and diplexer for QO-100
|31
|-
|The Secret Life of a TV Repeater
|33
|-
|Jamboree on the Air and QO-100
|35
|-
|CAT 19 South - a short report
|36
|-
|Turning Back the Pages
|37
|-
|DATV at the SDR Makerspace Conference
|39
|}

=====Issue 265 Autumn 2019=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|The BATC bursary scheme
|7
|-
|IARU Region 1 ATV Contest 2019 Results
|8
|-
|OBS and the Portsdown
|10
|-
|Using Mitsubishi MOSFET power modules with PE1RKI kits
|13
|-
|Telling the Story of MCR21
|16
|-
|Video Fundamentals 19
|18
|-
|The Jetson NanoBox
|20
|-
|LNB power supply with current limit for MiniTiouner
|22
|-
|A 250 Watt amplifier for Es’Hail-2 DATV
|23
|-
|Portsdown Newsletter
|26
|-
|The RSGB filming a new promotional video
|27
|-
|The LimeNET Micro – a Single-board DATV Transmitter
|28
|-
|Spectrum Matters
|29
|-
|The LongMynd Receiver on the Portsdown
|30
|-
|The LongMynd Receiver
|32
|-
|The G4WIM PA controller
|34
|-
|Turning Back the Pages - a 70 year special!
|39
|-
|ATV at Chalon-sur-Saone fayre
|43
|}

=====Issue 264 Summer 2019=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|BATC stand, Blackpool 2018 & 2019
|8
|-
|BATC Members’ Shop Update
|9
|-
|MCR21 Project Launch
|12
|-
|23 cm QRM
|13
|-
|Protecting Your LimeSDR Mini
|14
|-
|Portsdown Made Simple
|15
|-
|How to use K7FRY’s 10 Character Locator Website
|16
|-
|Dual channel output for the BATC version 2 MiniTiouner PCB
|17
|-
|KITTENS 19 & KITTENS 19 Activity Day
|19
|-
|Goonhilly Spectrum Monitor and WebSDR Maintenance Visit
|21
|-
|Video Fundamentals 18
|22
|-
|BATC at the Kempton Park Rally
|23
|-
|A very cheap easy to make Sync detector for
analogue video
|24
|-
|Well, I tried… 5.8GHz ATV
|25
|-
|Video Production - with a smartphone! Part 1.
|26
|-
|Turning Back the Pages - CQ-TV 76
|28
|-
|MCR21 Recording its History
|31
|-
|BATC at the Newbury Rally 2019
|31
|}

=====Issue 263 Spring 2019=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|OSCAR- 100 has arrived!
|9
|-
|Receiving QO-100
|10
|-
|Transmitting Systems for QO-100 on Es’hail-2
|12
|-
|G8LES Spectrian Amplifier mods for 2.3-2.4GHz
|15
|-
|Portsdown Newsletter
|17
|-
|Bias and reference injection board
|19
|-
|Easy Hole Plating at Home
|21
|-
|New DATV record on 76 GHz
|24
|-
|Bristol Mini-CAT
|24
|-
|MCR21 Progress
|25
|-
|The old and new models of the Octagon Twin LNB
|26
|-
|Route du Rhum
|26
|-
|Cheap Ebay Bias Tee
|27
|-
|Experiments with baseband digital video
|28
|-
|A New Audio Mixer for GB3KM
|32
|-
|BATC Website Incident
|33
|-
|Video Fundamentals 17
|34
|-
|3D Printed horn antennas - Part 2
|35
|-
|Simple dual band dish feed for Es’hail-2(POTY)
|37
|-
|Turning Back the Pages - CQ-TV 75
|41
|}

=====Issue 262 Winter 2018=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|BATC report to the RSGB Spectrum Forum
|11
|-
|BATC response to WRC Agenda Item 1.1
|12
|-
|The story behind Es’hail-2
|13
|-
|Portsdown Support for the LimeSDR
|15
|-
|Sydney Amateur Television goes 5.6 GHz
|18
|-
|We were there at the launch of Es’Hail-2!
|20
|-
|A 23cm Power Amplifier For Digital ATV
|22
|-
|Portsdown Newsletter
|25
|-
|I bought a 3-D printer
|27
|-
|DVB-S DATV signal power measurement
|29
|-
|Low band DATV
|30
|-
|DATV on 24cms
|31
|-
|Measuring Power on 5.6 GHz & a New Receiver
|33
|-
|Baliu RB-TV in Catalonia
|35
|-
|DATV over optical - Part 2: interfacing the two
|36
|-
|Video Fundamentals 16 - Aspect Ratio re-visited
|40
|-
|Turning Back the Pages - CQ-TV 74
|41
|}

=====Issue 261 Autumn 2018=====
{| class="wikitable" ;"
! style="width:400px; text-align:left;"|Article
! style="text-align:left;"|Page
|-
|Touchscreen control of the DATV Express – part 2
|9
|-
|CAT18 award presentations and prizes
|10
|-
|BATC Test Equipment
|11
|-
|Microwave roundtable construction competition winners
|11
|-
|A Handy Signal Generator for 10GHz
|12
|-
|Es’Hail-2 launching soon!
|14
|-
|The Future of CAT
|15
|-
|ATV Workshop in Shropshire
|16
|-
|Portsdown Newsletter
|17
|-
|DATV over optical – an introduction
|19
|-
|CAT18 Report
|21
|-
|BATC at Goonhilly
|25
|-
|Video Fundamentals 15 - Wire, labelling & MCR21
|26
|-
|Es’hail-2 Wideband Transponder
|28
|-
|BATC members and DATV in Spain
|29
|-
|Getting ready to receive Es’hail-2
|30
|-
|BATC Awards Presentations at CAT18
|33
|-
|Never mind the width - look at the quality
|34
|-
|David Ellis Jones B.Sc, ALCM. GW8PBX (SK)
|35
|-
|Locking the Octagon PLL LNB to an external reference
|36
|-
|Turning Back the Pages - CQ-TV 73
|37
|}

UK ATV DX Records

2021-09-30T08:18:22Z

G4FRE: /* 47GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 463km JA0DAE > JA0RUZ

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''
|}

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}
==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}

UK ATV DX Records

2021-09-28T20:27:06Z

G4FRE: /* 47GHz */

This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.

They are not complete and are based on trawling the forum activity pages and recent contest results - please update or let us know if you know better.

Note, these are UK records only (at least one of the stations involved was located in the UK) and only lists significant one way contacts.

World records are claimed based on the W6HHC list.

==World DATV records==

===W6HHC===

Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf

Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)

===HB9AFO===

HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm

==Historical records==

[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:

* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952

* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956

* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963

If you have any more details on these QSOs or other early records please contact any member of the committee.

==50MHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||
|-
| 08-11-2018|| 7.5 kms|| G8GTZ/P|| IO91KD - Wield || G8LES || IO91LC ||333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5719 Forum report]
|-
| 26-12-2018|| 228 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01JK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5794]
|-
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??

|}

==71MHz==
UK only
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments
|-
| 25-07-2018 || 59 kms || G8VPG/P|| IO81LS - Blorenge || G4BVK/P || IO81TK - Togg Hill||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5566 Forum report]
|-
| 14-09-2018|| 136 kms|| G8VPG/P|| IO81FE - Dunkery Beacon || G8BVK/P|| IO81XW - Cleeve common ||333Ks||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5628 Forum report]
|-
| 09-12-2018|| 160 Kms|| G8GTZ/P|| IO80WX - Win Green || G4FRE/P|| IO82QJ - Titterstone Clee|| 125Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5764&p=17639#p17639 Forum Report]
|-
| 27-12-2018|| 230 kms || G4FRE || IO82UC - Malvern || G0FRE/P || JO01KK - Isle of Sheppey ||250Ks||One way only [https://forum.batc.org.uk/viewtopic.php?f=76&t=5795]
|}

==146MHz==
UK only band released for amateur use on October 10th 2014
{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way
|-
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO
|-
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||
|-
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||
|-
| 11-06-2016 || 121 kms || G8VPG/P || IO81LS - Blorenge || G8GKQ/P || IO91GI - Walbury || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4519&start=20#p10748 Report]

|-
| 03-09-2016 || 169 kms || G8VPG/P|| IO80WX - Win Green || G8GTZ/P || IO82QL - Brown Clee || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=20 Report]
|-
| 03-09-2016 || 182 kms || G8GTZ/P|| IO82QL - Brown Clee || G8GKQ/P || IO80UU - Bulbarrow || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4684&start=10#p11046 Report]
|-
| 11-12-2016 || 185 kms || G8GTZ/P || IO90JO - Ventnor|| G8VPG/P || IO81LS - Boringe || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4759&start=20#p11437 Report]
|-
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]
|-
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||
|-
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]
|-
| 24-10-2018 || 407 kms || M0DTS/P || IO94MJ || G4UVZ || IO80KX || 333Ks|| '''World Record''' [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
|}

==70cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151
|-
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158
|-
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO ||
|-
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''
|}

==23cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156
|-
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003
|-
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''
|}

==13cms==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003
|-
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV ||
|-
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV||
|}

==9cms (3.4GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||
|-
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV
|-
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||
|}

==6cms (5.6GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||
|-
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||
|-
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS
|-
| 29-08-2017 || 138 kms || G8GTZ/P|| IO81FE - Dunkery Beacon || G8GKQ/P || IO81XW - Cleeve common || ATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Report]
|-
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||
|-
| 09-05-2018 || 158 kms || G4NJJ/P || JO02OW - East Runton || G8AGN / G0RPH/P || IO94VB - Bridlington || ATV || [https://forum.batc.org.uk/viewtopic.php?f=75&t=5468 Report]
|-
| 29-06-2018 || 159 kms || GI7UGV/P || IO74DN - Scrabo || G0HIK / M0KPW/P || IO84IH - Corney|| ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5538 Report]
|-
| 05-07-2018 || 180 kms || GI0GDP/P || IO74AU - Larne || G0HIK / M0KPW/P || IO84IH - Corney || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5545 Report]
|-
| 25-10-2018 || 190 kms|| G8GTZ/P || IO81XW - Cleeve Common || G3NWR/P || IO83RO- Winter Hill || ATV||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|-
| 25-10-2018 || 370 kms || G8VPG/P || IO81QF - Mendips || M0DTS/P || IO94MJ - NY Moors || ATV ||[https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Report]
|}
World record = 464km JA0DAE > JA0RUZ

==3cms (10GHz)==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003
|-
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007
|-
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||
|-
| 27-08-2017 || 136 kms || G8GTZ/P|| IO81FE - Dunkery Beacon|| G8GKQ/P || IO81XW - Cleeve Common || 333 Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5127#p13573 Forum]
|-
| 25-10-2018 || 407 kms || M0DTS/P || IO94MJ - NY Moors || G4UVZ || IO80KX || 2Ms DATV|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5693&start=10 Forum report]
|-
|}
World record = 463km JA0DAE > JA0RUZ

==24GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||
|-
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||
|-
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||
|-
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]
|-
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''
|}

==47GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments
|-
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||
|-
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|-
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 333ks/s||
|-
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||
|}
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV

==76GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV||
|-
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!||
|-
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''
|-
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||
|}

==122GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}
==134GHz==

{| class="wikitable"
|-
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments
|-
| Example || || || || || ||
|}