https://wiki.batc.org.uk/api.php?action=feedcontributions&user=G4FRE&feedformat=atomBATC Wiki - User contributions [en-gb]2024-03-28T10:14:42ZUser contributionsMediaWiki 1.35.6https://wiki.batc.org.uk/index.php?title=Portsdown_Test_Cards&diff=10458Portsdown Test Cards2023-08-27T09:44:04Z<p>G4FRE: /* Custom Test Cards */</p>
<hr />
<div>===Introduction===<br />
<br />
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.<br />
<br />
===Test Card Selection===<br />
<br />
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:<br />
<br />
[[File:tcfm.jpg|144px]] [[File:tcc.jpg|144px]] [[File:pm5544.jpg|144px]] [[File:75cb.jpg|144px]] [[File:11g.jpg|144px]]<br />
<br />
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.<br />
<br />
===Callsign Caption===<br />
<br />
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.<br />
<br />
===Custom Test Cards===<br />
<br />
Provision has been made to install 7 custom Test Cards. However, the Portsdown stores 3 versions of each card:<br />
* A 4:3 version which is a .jpg file of 720x576 pixels.<br />
* A 16:9 version which is a .jpg file of 1024x576 pixels<br />
* A 720p version which is a .jpg file of 1280x720 pixels<br />
<br />
If only one of these files is uploaded, the uploaded Test card will only be available in the uploaded definition.<br />
<br />
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.<br />
<br />
Custom Test Cards are preserved during software updates.</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_4_HDMI_Repeater_TX_Card_Setup&diff=10457Portsdown 4 HDMI Repeater TX Card Setup2023-08-27T09:16:00Z<p>G4FRE: </p>
<hr />
<div>'''Modifications to a Standard Portsdown 4 Card for Repeater Operation'''<br />
<br />
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<br />
<br />
2. Set the Symbol Rate. Option 2 Output, Option 1 Symbol Rate, 1000 (for example), press enter.<br />
<br />
3. Set the Output Device. Option 2 Output, Option 3 Output mode, down arrow to LIMEDVB, space bar to select, press enter. <br />
<br />
4. Set the Transmit Frequency. Option 2 Output, Option 5 Frequency, 1310 (for example) enter. Then enter again to select Direct (no transverter).<br />
<br />
5. Set the Modulation. Option 2 Output, Option 8 Modulation, down arrow to S2QPSK, space bar to select, press enter. <br />
<br />
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).<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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. <br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
12. Now you should reboot (Option 9 Shutdown, Option 2, Reboot Now) and check that your repeater transmitter restarts and operates correctly.<br />
<br />
13. Connect again using KiTTY. Type menu and press enter. The console menu will start.<br />
<br />
<br />
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.<br />
<br />
Typical output levels and shoulders at 1308 MHz (LimeSDR Mini with LimeDVB firmware) are:<br />
<br />
Lime Gain 90, Output Level -2.5dBm, shoulders -48db<br />
Lime Gain 92, Output level 0dBm, shoulders -45dB<br />
Lime gain 94, Output level +2.5dBM, shoulders -40dB<br />
Lime gain 96, Output level +3.5dBm, shoulders -38dB.<br />
<br />
<br />
That completes the configuration of your SD Card and Lime SDR.<br />
<br />
<br />
'''Usage Notes'''<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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. <br />
<br />
5. The repeater cards are not configured to be used with a touchscreen.<br />
<br />
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.<br />
<br />
7. The LimeSDR Mini can overheat during continuous use. For best results it should be fan-cooled.<br />
<br />
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.<br />
<br />
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.</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Configuring_your_channel&diff=10456Configuring your channel2023-08-27T09:14:03Z<p>G4FRE: /* Using an H265 Encoder Box */</p>
<hr />
<div>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.<br />
<br />
<br />
[[File:Streaming Details.JPG|600px]]<br />
<br />
==Chat nick name==<br />
<br />
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.<br />
<br />
==Stream Title==<br />
<br />
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.<br />
<br />
==Stream output URL==<br />
<br />
This is the direct URL you can give to people to watch your stream. You cannot change this URL.<br />
<br />
'''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. <br />
For example the stream name for the above screen shot is "https://batc.org.uk/live/g8gkq"'''<br />
<br />
==Stream input URL==<br />
<br />
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.<br />
<br />
'''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.'''<br />
<br />
===Streaming from the Portsdown===<br />
<br />
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. <br />
<br />
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.<br />
<br />
From the Touchscreen:<br />
<br />
# Select Menu 3<br />
# Select "Set Stream Outputs"<br />
# Select "Amend Preset"<br />
# Choose which of the 8 buttons to program and select it<br />
# Change the keyboard to lower case and enter the stream name and press enter<br />
# Change the keyboard to lower case and enter the stream key and press enter<br />
# Exit to Main Menu<br />
# Select "Output to"<br />
# Select BATC Stream<br />
# Select the Video source<br />
# Press TX<br />
<br />
===Using Adobe Media encoder===<br />
<br />
[[File:adobe stream.JPG|400px]]<br />
<br />
<br />
* In the '''FMS URL:''' box put "rtmp://rtmp.batc.org.uk/live" (Note there is no / on the end)<br />
<br />
* In the '''Stream:''' box put your "callsign-key".<br />
<br />
===Using Vmix===<br />
<br />
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.<br />
<br />
===Using OBS===<br />
<br />
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.<br />
<br />
===Using an H265 Encoder Box===<br />
<br />
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.<br />
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.<br />
The encoder cannot produce H264 for the BATC streamer and H265 for Pluto at the same time.<br />
<br />
The url for the RTMP stream to the BATC streamer is of the form:<br />
<br />
rtmp://88.80.184.32/live/your_callsign-keykey<br />
<br />
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 !<br />
<br />
The error was caused by copying the key on paper from the RPI 7" LCD streamer where both characters look the same.<br />
<br />
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<br />
<br />
==Stream type==<br />
<br />
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.<br />
<br />
==Stream options==<br />
<br />
* "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).<br />
'''<br />
* The "Chat On" box is ticked by default; if you untick this, there will be no chat window associated with your stream.<br />
<br />
* "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.<br />
<br />
==Streaming type==<br />
<br />
The Streaming Type sets the default video player type on the Live Stream page, this can be set to either Flash or HTML5.<br />
<br />
=== Flash Player ===<br />
<br />
'''Advantages'''<br />
* Minimal delay (typically less than 1 second)<br />
<br />
'''Disadvantages'''<br />
* The user needs Flash Player plugin installed, and manually enabled.<br />
** 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.<br />
<br />
=== HTML5 Player ===<br />
<br />
'''Advantages'''<br />
* Plays without plugins on all modern desktop and mobile (phone/tablet) browsers<br />
<br />
'''Disadvantages'''<br />
* Long and variable delay (typically 10-20 seconds depending on user's browser)<br />
<br />
==Stream description==<br />
<br />
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.<br />
<br />
[[File:streamer.JPG|400px]]<br />
<br />
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.<br />
<br />
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.</div>G4FREhttps://wiki.batc.org.uk/index.php?title=BATC_Wiki&diff=10442BATC Wiki2023-08-09T10:29:05Z<p>G4FRE: /* ATV projects */</p>
<hr />
<div>'''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/<br />
<br />
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. <br />
<br />
* New to Amateur TV - Get the basics on our [[Getting Started|Getting Started page]]<br />
<br />
* For details on the Portsdown DATV transmit and receive system go to [[The Portsdown DATV transceiver system|the Portsdown pages]]<br />
<br />
* For information on the MiniTiouner USB DATV receiver go to [[MiniTioune|MiniTiouner]]<br />
<br />
* For the DATV equipment capability list go to [[DATV equipment capability|https://wiki.batc.org.uk/DATV_equipment_capability]]<br />
<br />
<br />
== Contents ==<br />
* [[Registering]] on the BATC wiki<br />
<br />
== New to Amateur TV? ==<br />
* Get the basics on our [[Getting Started|Getting Started page]]<br />
<br />
==BATC Information and services==<br />
* [[Joining the BATC]]<br />
<br />
* [[Renewing your membership]]<br />
<br />
* The [[BATC Privacy statement and data protection policy]]<br />
<br />
* The [[BATC forum]]<br />
<br />
* The [[BATC shop]]<br />
<br />
* The [[The_new_streamer|BATC streamer]]<br />
<br />
* The [[BATC archive]] Collection of photos and documents from BATC's past<br />
<br />
* The [[new BATC website|BATC website]]<br />
<br />
== BATC projects ==<br />
* [[The Portsdown Transmitter]] - the BATC's Raspberry Pi-based DATV Transmitter<br />
* [[MiniTioune]] - the DATV DVB-S / S2 receiver project<br />
* [[Ryde Receiver]] - Dedicated DATV set top box project<br />
* [[Knucker]] - Variable bandwidth DVB-T project<br />
* [[Advanced receiver hardware]] - Details of the BATC advanced receiver hardware.<br />
* [[WinterHill Receiver Project]] - Multi-channel DVB-S / S2 project<br />
* [[BATC Video Source]] - The Raspberry Pi-based composite video source described in CQ-TV 270<br />
* [[BATC HDMI Source]] - The Raspberry Pi-based HDMI video source to be described in CQ-TV 280<br />
* [[Digilite]] - The original home build DATV construction project<br />
* [[Repeater Controller]] - The BATC ATV Repeater Controller using a Raspberry Pi 4<br />
<br />
== CQ-TV Magazine ==<br />
* [[Index of articles]]<br />
* [[Archive edition|Archive editions]] download<br />
* [[BATC_Software_Library]] for project downloads<br />
<br />
==BATC Event Streaming Equipment==<br />
* [[Equipment Description]]<br />
<br />
== BATC Conventions ==<br />
* [[CAT 23 part 1]] <br />
* [[CAT 22 part 2]] Presentations from the CAT 22 Part 2 Zoom Meeting.<br />
* [[CAT 22 part 1]] Chairman's report from the BATC GM<br />
* [[CAT 21]] Presentations from CAT 21 which was conducted as a Zoom Meeting.<br />
* [[CAT 20]] Presentations from CAT 20 which was conducted as a Zoom Webinar.<br />
* [[CAT 19 South|CAT 19 South (Didcot)]] Presentations from the 2019 regional convention at Didcot.<br />
* [[CAT 19 Finningley]] Presentations from the 2019 regional convention at Finningley.<br />
* [[CAT 19 Bristol]] Presentations from the 2019 regional convention at Bristol.<br />
* [[CAT 18|CAT 18 Coventry]] Presentations and links to the videos from the 2018 convention.<br />
* [[CAT 17|CAT 17 Finningley|]] Antenna test range results, presentations and links to the videos from the 2017 convention.<br />
* [[Presentations from CAT 16|CAT 16 Cosford]] Presentations and links to the videos from the 2016 convention.<br />
* Video Recordings from previous ATV Conventions can be found on the [https://www.youtube.com/channel/UCUWLnUZllytlcCFd93tnBzw BATC YouTube Channel].<br />
<br />
==National and International Events==<br />
<br />
* [[ HAM RADIO 2018 ]] ATV Presentations from HAM RADIO 2018 at Friedrichhsafen.<br />
<br />
* [[ HAM RADIO 2019 ]] ATV Presentations from HAM RADIO 2019 at Friedrichshafen.<br />
<br />
* [[ HAM RADIO 2022 ]] ATV Presentations from HAM RADIO 2022 at Friedrichshafen.<br />
<br />
* [[ RSGB Convention 2022 ]] ATV Presentation at the 2022 RSGB Convention 2022<br />
<br />
* [[ HAM RADIO 2023 ]] ATV Presentations from HAM RADIO 2023 at Friedrichshafen.<br />
<br />
== Getting on the air with ATV ==<br />
===The ATV bands===<br />
* [[29 MHz]]<br />
* [[51 MHz]]<br />
* [[71 MHz]]<br />
* [[146 MHz RB-TV]]<br />
* [[70cms Analogue TV]]<br />
* [[70cm DATV]]<br />
* [[23cms ATV]]<br />
* [[13cms]]<br />
* [[3.4 GHz DATV]]<br />
* [[5.6 GHz]]<br />
* [[10 GHz]]<br />
* [[:Media:ATV on 5.6 10 and 24 Ghz.pdf|April 2018 Presentation to MMRT about ATV on 5.6 10 and 24 GHz]]<br />
<br />
===The different ATV modes===<br />
* [[Reduced bandwidth TV]] (RB-TV)<br />
* [[The Effect of FEC]]<br />
<br />
===Equipment Options===<br />
* [[DATV transmitting Equipment]]<br />
<br />
==Advanced encoding / input options==<br />
<br />
Details of advanced transmission configurations, primarily for H265,and video production software.<br />
<br />
* [[Feeding Video to Portsdown from vMix|Vmix output in to Portsdown IPTS input]]<br />
* [[OBS - Open Broadcast Studio|OBS output in to Portsdown IPTS input]]<br />
* [[Using GTX10xx Graphics card encoder with OBS]]<br />
* [[Custom_DATV_Firmware_for_the_Pluto|Using the Pluto for DATV]]<br />
* [[Jetson_Nano|Using the Jetson Nano with Portsdown]]<br />
<br />
== Operating ==<br />
* [[DATV equipment capability]] - Wiki page documenting the capabilities of common DATV transmit and receive equipment.<br />
* [[ATV standards]] - a list of standards used by ATV operators including FM bandwidths, DATV PIDs, symbol rates and FEC<br />
* [[EMF Compliance]] - information about EMF compliance for ATV and Microwave Operation<br />
* [[Directory of portable sites]] suitable for ATV and microwave operation<br />
* [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<br />
* [[Mapping tools]] including finding the QRA locator of a site, UK postcode to Lat and Long conversion and a topographic overlay for Google maps<br />
* [[Propagation tools]]<br />
* [[UK ATV DX Records]] - a list of Known DX Records for the UK<br />
* [[2022 Activity Weekends]]<br />
* [[2023 BATC Activity Weekends & Contests]]<br />
* [[Christmas 2022 Repeater Contest & Activity Challenge]]<br />
* [[2021 5.6GHz Activity Ladder]]<br />
* [[IARU ATV contest]] - How to enter the annual international TV contest<br />
* [[IARU ATV contest 2022 International Results]] - International Results for the June 2022 IARU Contest<br />
* [[IARU ATV contest 2021 International Results]] - International Results for the June 2021 IARU Contest<br />
* [[IARU ATV contest 2020 International Results]] - International Results for the June 2020 IARU Contest<br />
* [[IARU ATV contest 2019 International Results]] - International Results for the June 2019 IARU Contest<br />
* [[IARU ATV contest 2018 Results]] - UK Results for the June 2018 IARU and BATC Contests<br />
* [[IARU ATV contest 2018 International Results]] - International Results for the June 2018 IARU Contest<br />
* [[September 2019 BATC Low Band Contest]]<br />
<br />
==ATV repeaters==<br />
* [[UK ATV repeaters]]<br />
* [[USA ATV repeaters]]<br />
* [[Australian TV repeaters]]<br />
<br />
* [[Technical topics for ATV repeater builders]]<br />
<br />
==Es'hail-2==<br />
* [[Es'hail-2 Basic Information|Getting started, LNBs and aligning a dish]]<br />
<br />
* [[Es'hail-2 Ground Station|Es'hail-2 BATC WebSDR & DATV Spectrum Monitor]]<br />
<br />
* [[Es'hail-2 DATV Bandplan]]<br />
<br />
* [[Es'hail-2_LNBs_and_Antennaes|Es'hail-2_LNBs]]<br />
<br />
* [[Transmitting_Oscar_100_DATV_signals|Es'hail-2 Transmitters]]<br />
<br />
* [[Es'hail-2 Antennaes]]<br />
<br />
* [[Es'hail-2 conference transmissions]]<br />
<br />
<br />
==ATV projects==<br />
* [[Adalm Pluto]] - Collection of information on using the Adalm Pluto for DATV<br />
* [[The MacGuffin Project]] - Collection of tools used to create an automated multi-band ATV system <br />
* [[Receiver upconverters]] - Details of upconverters to receive 146 and 437 MHz on STB and MiniTioune<br />
* [[Jetson Nano]] - Third generation computer-based DATV Transmitter<br />
* [[DTX1 TS]] - interface board to take in TS streams to the DTX1<br />
* [[RpiDATV]] - software for the Rpi<br />
* [[RBTVMOD]] - variable rate RB-TV mdulator for the Rpi<br />
* [[DATVExpress]] - SDR hardware based DATV transmitter covering 70 - 2450 MHz<br />
* [[PE4302]] - PE4302 variable attenuator project<br />
* [[ADF435x PIC]] - PIC controllers for Chinese ADF4350/4351 boards<br />
* [[DigiTwist]] - an experimental 2 axis satellite tracker<br />
* [[G4WIM PA controller]] - an advanced PA controller design by G4WIM published in CQ-TV 265<br />
* [[WinterHill Receiver Project]]<br />
* [[Tilt-O-Matic]] Pan and tilt head for surveyor tripods<br />
* [[Gerber Files]] Index of Gerber (PCB) files used by BATC and Members' Projects<br />
<br />
== Deutschsprachiges Wiki ==<br />
<br />
* Portsdown DATV Projekt - Deutschsprachiges Wiki<br />
* Minitioune(r) - Deutschsprachiges Wiki<br />
<br />
== Useful Circuits and notes ==<br />
* [[Antenna changeover relays]] - Notes on suitable antenna change over relays for ATV use.<br />
* [[Filters]] - Collection of links and designs for that most critical but over looked component!<br />
* [[Pre-amps]] - Notes, suppliers and circuits of pre-amplifiers suitable for ATV<br />
* [[Power amplifiers]] - Notes, suppliers and circuits of power amplifiers suitable for ATV<br />
* [[Video circuits]] - Notes and circuits for video processing<br />
* [[Satellite receiver tuning offsets]] - Note on how to set up a satellite receiver to directly receive L band signals.<br />
* [[Using ex-satellite dishes]] - Notes on how to find the feed point of a dish and designs for feeds to use<br />
<br />
== ATV Equipment manuals and schematics ==<br />
* [[Bob Platts G8OZP]] Circuits and documentation for the Bob Platts range of equipment<br />
* [[Comtech module]] - 23cms and 13cms ATV Tx and Rx circuits and guides<br />
* [[Solent ATV units]] - Tx and Rx circuits and information<br />
* [[Wood & Douglas FM TV equipment]] - Circuits, pcb layouts and information<br />
* [[LMW Electronics]] - Circuits, pcb layouts and information<br />
* [[Fortop]] - Circuits, pcb layouts and information<br />
* [[Glencom]] - VC-510 VHF to L band up converter circuit diagram and modifications<br />
* [[Global communications]] - Hand drawn circuit of tuneable 70 / 140 MHz to L band block up converter<br />
* [[Jaybeam]] - Details of many Jaybeam aerials<br />
<br />
== Ex commercial broadcast equipment manuals ==<br />
* [[NDS System 3000]]<br />
* [[NDS Alteia rx]]<br />
<br />
== Test equipment manuals ==<br />
For HP and Agilent equipment see the [https://groups.yahoo.com/neo/groups/hp_agilent_equipment/info Yahoo group]<br />
<br />
== Other equipment information related to ATV ==</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=10284UK ATV DX Records2023-02-05T22:33:26Z<p>G4FRE: /* 122GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2022.pdf<br />
<be><br />
<br />
Tropo-ducting opened up on Non 13 2022 on <br />
* 70 CM for a very long two-way QSO between Germany and England<br />
<br />
Five new world records were added in the summer of 2022.<br />
* 6M a new world record was accomplished in June 2022 with the help of Es propagation.<br />
* 144 MHz record in July 2022 during the Dutch RBDTV Contest using mainly "airplane-scatter".<br />
* 10 GHz a new world record was accomplished in May 2022.<br />
* 2.4 GHz a new world record was accomplished in May 2022.<br />
* 440 MHz a new world record was accomplished in May 2022.<br />
<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
World record = 464km JA0DAE > JA0RUZ<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
World record = 904.12 km IT5HZM - IW9GUR<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|-<br />
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||<br />
|-<br />
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||<br />
|}<br />
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022 '''World Record'''<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=9845UK ATV DX Records2022-06-24T07:03:47Z<p>G4FRE: /* 122GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
World record = 464km JA0DAE > JA0RUZ<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
World record = 904.12 km IT5HZM - IW9GUR<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|-<br />
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||<br />
|-<br />
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||<br />
|}<br />
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 11-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=9844UK ATV DX Records2022-06-24T07:03:24Z<p>G4FRE: </p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
World record = 464km JA0DAE > JA0RUZ<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
World record = 904.12 km IT5HZM - IW9GUR<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|-<br />
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||<br />
|-<br />
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||<br />
|}<br />
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 21-06-2022 || 5.6 km|| G4FRE/P ||IO93OX - Garrowby || G4NXO/P || IO93PW - Millington|| DATV 250 ks/s||IARU 2022<br />
|}<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=5.6_GHz&diff=94555.6 GHz2022-02-27T10:36:33Z<p>G4FRE: /* Satellite dishes */</p>
<hr />
<div>[[File:5.6 GHz Orientation Small.jpg|300px|center]]<br />
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.<br />
<br />
M0KPW has an excellent website describing his 5.6GHz system http://www.5-6ghz-atv.co.uk/<br />
<br />
==Frequency choice==<br />
<br />
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:-<br />
<br />
<br />
[[File:bandplan.JPG|800px]]<br />
<br />
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<br />
<br />
The FPV equipment receive and transmit frequencies are set using DIP switches, and most tune to 5665 MHz &ndash; 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.<br />
<br />
==Equipment== <br />
<br />
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.<br />
<br />
[[File:Tairot 1.jpg|400px]]<br />
<br />
Be aware &ndash; we have found that on some receiver units, the video output is on the Red phono lead and not the expected Yellow lead!<br />
<br />
Some other users' stations are described here [[5.6 GHz Equipment Examples]].<br />
<br />
===Mounting the equipment===<br />
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. <br />
<br />
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 &ndash; mounting them in a diecast box on the back of their respective antennas is ideal.<br />
<br />
[[File:GKQ 5.6v2.JPG|600px]]<br />
<br />
<br />
Details of G8GKQ's transceiver setup is shown here (receiver unit on left & transmitter with fan on the right)<br />
<br />
===Transmit amplifiers===<br />
<br />
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&mdash;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) &ndash; and remember that his will increase the volt drop on any long 12V cable feeding the transmitter at the masthead.<br />
<br />
Be warned!! Several users have found these PAs to be "fragile", so you should always make sure that the antenna is connected &ndash; and all connectors done up tight &ndash; before applying dc or RF power. We are investigating whether they can be made more reliable by reducing the volts / input drive.<br />
<br />
<br />
[[File:56PA.jpg|200px]]<br />
<br />
==Antenna changeover relays==<br />
<br />
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 &ndash; semi-rigid cables fitted with SMA connectors are ideal. <br />
<br />
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. <br />
<br />
See [[Antennae changeover relays|this wiki page]] for more details on suitable relays, 24 volt operation, and 4 port (or transfer) relays.<br />
<br />
If no suitable relay is available, it may be cheaper to use separate antennas for receive and transmit as shown in the picture below &ndash; note the Tx and Rx units are mounted directly on the back of the flat panel antennas.<br />
<br />
[[File:562.jpg|200px]]<br />
<br />
===Reverse SMA=== <br />
<br />
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 &ndash; which will not fit. Adapters from reverse to standard SMA are available on eBay or other suppliers &ndash; search for "RP-SMA to SMA adaptor" or similar wording.<br />
<br />
==Antennas==<br />
<br />
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.<br />
<br />
<br />
Horizontal polarisation has been chosen as the standard (waveguide feeds needs to have the long dimension of the aperture &ndash; and/or horn &ndash; vertically oriented when feeding dishes)<br />
<br />
=== Satellite dishes ===<br />
<br />
It is also possible to use a satellite mini dish with a suitable feed, such as a waveguide/horn to the design by G4NNS &ndash; see here for construction details: http://myweb.tiscali.co.uk/g4nns/FeedHorn.html<br />
<br />
The picture shows a Sky mini dish fed with a WA5VJB log-periodic PCB feed http://www.wa5vjb.com/products1.html &ndash; these are available in the UK from G4DDK. http://www.g4ddk.com/Prices2.html<br />
<br />
Dishes of this size typically have a beam width of 4&mdash;8 degrees.<br />
<br />
[[File:56 dish feed.JPG|400px]]<br />
<br />
<br />
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:<br />
<br />
[[File:PCB dish feed.JPG|200px]] [[File:PCB dish feed2.JPG|300px]]<br />
<br />
=== DIY BiQuad antennae ===<br />
<br />
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.<br />
<br />
Note in the picture G8JAN has directly connected the Tx module to the antenna to avoid co-ax losses.<br />
<br />
[[File:feed.jpg|400px]]<br />
<br />
==Video equipment - Rx==<br />
The receiver output will need to be directly connected to a monitor with a composite video input to view the received the signal &ndash; normally on a yellow phono or RCA connector. <br />
<br />
===Video squelch defeat=== <br />
<br />
Beware of using modern flat-screen monitors which have a video squelch &ndash; these will not display noisy signals, and just give a blue screen until they get a strong video signal.<br />
<br />
There are a number of circuits around to defeat the squelch and also improve the readability of the signal.<br />
<br />
===Syncsmurf by PE1RQM=== <br />
&ndash; 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].<br />
<br />
[[File:syncsmurf1.jpg|200px]]<br />
<br />
Results are very impressive:<br />
<br />
[[File:syncsmurf2.jpg|400px]]<br />
<br />
===eachine FPV recorder===<br />
<br />
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 &ndash; Sandisk are preferred. <br />
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<br />
<br />
[[File:emachine dvr.JPG|300px]]<br />
<br />
===Video sync processor===<br />
<br />
[[File:cqtv 129.jpg|300px]]<br />
<br />
<br />
Or any video sync processor may be usable such as the Advanced Converter Enhancer used by many stations on 23cms FM TV transmissions.<br />
<br />
[[File:ACE.jpg|300px]]<br />
<br />
==Receive Pre-amplifiers==<br />
<br />
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.<br />
<br />
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/ <br />
<br />
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.<br />
<br />
The following document shows the simple mods required to make a 5.6GHz pre-amp: <br />
<br />
[[File:5.6GHz pre-amp.JPG|600px]]<br />
<br />
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:<br />
<br />
[[File:supply.jpg|600px]]<br />
<br />
==Video equipment - Tx==<br />
An old camcorder with a yellow phono "video out" socket is an ideal video and audio source for the transmitter.<br />
<br />
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!<br />
<br />
===Media card reader===<br />
<br />
A simple way to generate test patterns is to use a media card reader loaded with .jpg files &ndash; these are available on several sites, just search for "SD card media AV player" &ndash; but make sure you get one which outputs PAL video.<br />
<br />
[[File:av player.JPG|200px]]<br />
<br />
===PicDream===<br />
The PicDream project uses a single PIC chip and a 4MHz crystal to generate a black and white test pattern &ndash; simple but effective &ndash; the original project was described in CQ-TV 180 and re-printed in CQ-TV 247.<br />
<br />
[[File:Picdream 247.JPG|400px]]<br />
<br />
The PIC code is available for download here: batc.org.uk/cq-tv/software/picdream.zip<br />
<br />
===PicDream II===<br />
<br />
[[File:picdream2.jpg|400px]]<br />
<br />
<br />
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.<br />
<br />
Further information is at https://github.com/F1CJN/PICDREAM-II<br />
<br />
===Raspberry Pi - PA3CHM image generator===<br />
<br />
CQ-TV 247 published details of a simple RPi-based test card generator by Ernest PA3CHM.<br />
<br />
[[File:PA3chm.JPG|400px]]<br />
<br />
Full details are on his website: http://www.pa3hcm.nl/?p=248<br />
<br />
===Raspberry Pi - Portsdown patterns===<br />
The BATC Portsdown project can be configured to deliver composite video and audio out from the RPi multi-jack plug. <br />
<br />
[[File:GKQ July 2017 (Small).JPG|400px]]<br />
<br />
This can be test patterns, RPi desktop, or the Portsdown camera and microphone &ndash; [[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.<br />
<br />
===Stand alone Raspberry Pi animated test card generator===<br />
This is the stand alone version of the animated test card generator that is part of the Portsdown software <br />
[[RPi Test Card| - <u>see this wiki page for more details</u>]]<br />
<br />
==On the air==<br />
<br />
Using dish aerials of 30&mdash;60cm, line of sight ranges of 80km can easily be achieved. <br />
<br />
P5 (noise free) FM ATV pictures have been exchanged over a 138km path using the equipment described on this page &ndash; the picture below shows G4CPE/P on Dunstable Downs being received at the Ridgeway, near Didcot, over a slightly obstructed 66km path.<br />
<br />
[[File:CPE 5.6GHz.JPG|400px]]<br />
<br />
<br />
Dunkery Beacon near Minehead, to Cleeve Common near Cheltenham.<br />
The picture shows G8GTZ/P received by G8GKQ/P over the 138km path.<br />
<br />
[[File:snap5 small.jpg|400px]]<br />
<br />
<br />
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.<br />
<br />
This has since been surpassed.<br />
<br />
==FM voice only==<br />
<br />
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 &ndash; this modulates the main high level carrier with audio rather than video (the two audio phono connectors &ndash; red and white &ndash; can be ignored). On RX, the yellow phono connector of the receiver is simply connected to a line level input of an audio amplifier. <br />
<br />
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 &ndash; 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.<br />
<br />
==Activity hot spots==<br />
<br />
There is a Google map showing approximate locations of stations thought to be active on 5.6GHz FM &ndash; 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<br />
<br />
Known users include:<br />
<br />
*Southern England = G8GKQ, G8GTZ, G0UHY, G8XZD, G4UVZ, G3VPF<br />
*Dunstable area = M0SKM, G4CPE, G0WFT<br />
*North-East = GB3KM, G1LPS, M0DTS<br />
*Cheltenham = G0LGS, M0RKX and G4NZV (using WB audio only)<br />
*Bolton Wireless Club = G4JLG, G6GVI, G8PEF, M0UFC, MW1FGQ (PW “Siren” Article)<br />
*Ludlow, Shropshire = G8XYJ<br />
*Yorkshire = G8BYN<br />
*Norfolk = G4NJJ, G8JAN, G4WVU and M1BKF<br />
*Cumbria - Barrow-in-Furness Radio Club project<br />
*Merseyside - G3NWR<br />
*Northern Ireland = GI4DOH, GI3VAF, GI0GDP, GI7UGV<br />
<br />
[[File:cpe2.jpg|400px]]<br />
<br />
==More information==<br />
<br />
Dave G8GKQ did a presentation at the BATC annual convention CAT17 in September 2017 on getting started on 5.6GHz ATV.<br />
*The presentation is available here https://wiki.batc.org.uk/images/4/42/CAT17_5.6_GHzv2.pdf<br />
*The video of the session is available on the BATC YouTube channel here https://www.youtube.com/watch?v=XJzGNsGmE9Y<br />
<br />
==On line support / social media==<br />
<br />
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<br />
<br />
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.<br />
<br />
==Technical information==<br />
<br />
===SM201R===<br />
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! <br />
<br />
[[File:sm201r 2.jpg|500px]] [[File:sm201r 3.JPG|200px]]<br />
<br />
<br />
[[File:sm201r 1.JPG|500px]]<br />
<br />
===S meter output===<br />
<br />
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.<br />
<br />
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.<br />
<br />
====Tx and Rx perfomance====<br />
<br />
Initial measurements suggest the TX bandwidth is 25&mdash;30MHz.<br />
<br />
[[File:5.6GHz spectrum.jpg|500px]]<br />
<br />
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.<br />
<br />
===Channel Listings===<br />
<br />
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:<br />
<br />
[[File:Tarot_Channels.jpg|603px]]<br />
<br />
And this is the table for the Eachine TS835 transmitter:<br />
<br />
[[File:Channels_2.jpg|619px]]<br />
<br />
This table is from a "Fat Shark" transmitter that does not cover 5665 MHz:<br />
<br />
[[File:Fat_Shark.PNG|300px]]<br />
<br />
==Improvements to Commercial Units==<br />
<br />
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.<br />
[[File:BandaBase.jpg|672px]]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=5.6_GHz&diff=94545.6 GHz2022-02-27T10:31:37Z<p>G4FRE: /* Satellite dishes */</p>
<hr />
<div>[[File:5.6 GHz Orientation Small.jpg|300px|center]]<br />
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.<br />
<br />
M0KPW has an excellent website describing his 5.6GHz system http://www.5-6ghz-atv.co.uk/<br />
<br />
==Frequency choice==<br />
<br />
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:-<br />
<br />
<br />
[[File:bandplan.JPG|800px]]<br />
<br />
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<br />
<br />
The FPV equipment receive and transmit frequencies are set using DIP switches, and most tune to 5665 MHz &ndash; 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.<br />
<br />
==Equipment== <br />
<br />
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.<br />
<br />
[[File:Tairot 1.jpg|400px]]<br />
<br />
Be aware &ndash; we have found that on some receiver units, the video output is on the Red phono lead and not the expected Yellow lead!<br />
<br />
Some other users' stations are described here [[5.6 GHz Equipment Examples]].<br />
<br />
===Mounting the equipment===<br />
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. <br />
<br />
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 &ndash; mounting them in a diecast box on the back of their respective antennas is ideal.<br />
<br />
[[File:GKQ 5.6v2.JPG|600px]]<br />
<br />
<br />
Details of G8GKQ's transceiver setup is shown here (receiver unit on left & transmitter with fan on the right)<br />
<br />
===Transmit amplifiers===<br />
<br />
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&mdash;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) &ndash; and remember that his will increase the volt drop on any long 12V cable feeding the transmitter at the masthead.<br />
<br />
Be warned!! Several users have found these PAs to be "fragile", so you should always make sure that the antenna is connected &ndash; and all connectors done up tight &ndash; before applying dc or RF power. We are investigating whether they can be made more reliable by reducing the volts / input drive.<br />
<br />
<br />
[[File:56PA.jpg|200px]]<br />
<br />
==Antenna changeover relays==<br />
<br />
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 &ndash; semi-rigid cables fitted with SMA connectors are ideal. <br />
<br />
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. <br />
<br />
See [[Antennae changeover relays|this wiki page]] for more details on suitable relays, 24 volt operation, and 4 port (or transfer) relays.<br />
<br />
If no suitable relay is available, it may be cheaper to use separate antennas for receive and transmit as shown in the picture below &ndash; note the Tx and Rx units are mounted directly on the back of the flat panel antennas.<br />
<br />
[[File:562.jpg|200px]]<br />
<br />
===Reverse SMA=== <br />
<br />
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 &ndash; which will not fit. Adapters from reverse to standard SMA are available on eBay or other suppliers &ndash; search for "RP-SMA to SMA adaptor" or similar wording.<br />
<br />
==Antennas==<br />
<br />
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.<br />
<br />
<br />
Horizontal polarisation has been chosen as the standard (waveguide feeds needs to have the long dimension of the aperture &ndash; and/or horn &ndash; vertically oriented when feeding dishes)<br />
<br />
=== Satellite dishes ===<br />
<br />
It is also possible to use a satellite mini dish with a suitable feed, such as a waveguide/horn to the design by G4NNS &ndash; see here for construction details: http://myweb.tiscali.co.uk/g4nns/FeedHorn.html<br />
<br />
The picture shows a Sky mini dish fed with a WA5VJB log-periodic PCB feed http://www.wa5vjb.com/products1.html &ndash; these are available in the UK from G4DDK. http://www.g4ddk.com/Prices2.html<br />
<br />
Dishes of this size typically have a beam width of 4&mdash;8 degrees.<br />
<br />
[[File:56 dish feed.JPG|400px]]<br />
<br />
<br />
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:<br />
<br />
<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><br />
<br />
<u>https://www.antennas-amplifiers.com/feed-Illuminator-satellite-offset-dish-fd-0.5-0.8</u><br />
<br />
[[File:PCB dish feed.JPG|200px]] [[File:PCB dish feed2.JPG|300px]]<br />
<br />
=== DIY BiQuad antennae ===<br />
<br />
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.<br />
<br />
Note in the picture G8JAN has directly connected the Tx module to the antenna to avoid co-ax losses.<br />
<br />
[[File:feed.jpg|400px]]<br />
<br />
==Video equipment - Rx==<br />
The receiver output will need to be directly connected to a monitor with a composite video input to view the received the signal &ndash; normally on a yellow phono or RCA connector. <br />
<br />
===Video squelch defeat=== <br />
<br />
Beware of using modern flat-screen monitors which have a video squelch &ndash; these will not display noisy signals, and just give a blue screen until they get a strong video signal.<br />
<br />
There are a number of circuits around to defeat the squelch and also improve the readability of the signal.<br />
<br />
===Syncsmurf by PE1RQM=== <br />
&ndash; 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].<br />
<br />
[[File:syncsmurf1.jpg|200px]]<br />
<br />
Results are very impressive:<br />
<br />
[[File:syncsmurf2.jpg|400px]]<br />
<br />
===eachine FPV recorder===<br />
<br />
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 &ndash; Sandisk are preferred. <br />
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<br />
<br />
[[File:emachine dvr.JPG|300px]]<br />
<br />
===Video sync processor===<br />
<br />
[[File:cqtv 129.jpg|300px]]<br />
<br />
<br />
Or any video sync processor may be usable such as the Advanced Converter Enhancer used by many stations on 23cms FM TV transmissions.<br />
<br />
[[File:ACE.jpg|300px]]<br />
<br />
==Receive Pre-amplifiers==<br />
<br />
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.<br />
<br />
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/ <br />
<br />
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.<br />
<br />
The following document shows the simple mods required to make a 5.6GHz pre-amp: <br />
<br />
[[File:5.6GHz pre-amp.JPG|600px]]<br />
<br />
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:<br />
<br />
[[File:supply.jpg|600px]]<br />
<br />
==Video equipment - Tx==<br />
An old camcorder with a yellow phono "video out" socket is an ideal video and audio source for the transmitter.<br />
<br />
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!<br />
<br />
===Media card reader===<br />
<br />
A simple way to generate test patterns is to use a media card reader loaded with .jpg files &ndash; these are available on several sites, just search for "SD card media AV player" &ndash; but make sure you get one which outputs PAL video.<br />
<br />
[[File:av player.JPG|200px]]<br />
<br />
===PicDream===<br />
The PicDream project uses a single PIC chip and a 4MHz crystal to generate a black and white test pattern &ndash; simple but effective &ndash; the original project was described in CQ-TV 180 and re-printed in CQ-TV 247.<br />
<br />
[[File:Picdream 247.JPG|400px]]<br />
<br />
The PIC code is available for download here: batc.org.uk/cq-tv/software/picdream.zip<br />
<br />
===PicDream II===<br />
<br />
[[File:picdream2.jpg|400px]]<br />
<br />
<br />
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.<br />
<br />
Further information is at https://github.com/F1CJN/PICDREAM-II<br />
<br />
===Raspberry Pi - PA3CHM image generator===<br />
<br />
CQ-TV 247 published details of a simple RPi-based test card generator by Ernest PA3CHM.<br />
<br />
[[File:PA3chm.JPG|400px]]<br />
<br />
Full details are on his website: http://www.pa3hcm.nl/?p=248<br />
<br />
===Raspberry Pi - Portsdown patterns===<br />
The BATC Portsdown project can be configured to deliver composite video and audio out from the RPi multi-jack plug. <br />
<br />
[[File:GKQ July 2017 (Small).JPG|400px]]<br />
<br />
This can be test patterns, RPi desktop, or the Portsdown camera and microphone &ndash; [[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.<br />
<br />
===Stand alone Raspberry Pi animated test card generator===<br />
This is the stand alone version of the animated test card generator that is part of the Portsdown software <br />
[[RPi Test Card| - <u>see this wiki page for more details</u>]]<br />
<br />
==On the air==<br />
<br />
Using dish aerials of 30&mdash;60cm, line of sight ranges of 80km can easily be achieved. <br />
<br />
P5 (noise free) FM ATV pictures have been exchanged over a 138km path using the equipment described on this page &ndash; the picture below shows G4CPE/P on Dunstable Downs being received at the Ridgeway, near Didcot, over a slightly obstructed 66km path.<br />
<br />
[[File:CPE 5.6GHz.JPG|400px]]<br />
<br />
<br />
Dunkery Beacon near Minehead, to Cleeve Common near Cheltenham.<br />
The picture shows G8GTZ/P received by G8GKQ/P over the 138km path.<br />
<br />
[[File:snap5 small.jpg|400px]]<br />
<br />
<br />
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.<br />
<br />
This has since been surpassed.<br />
<br />
==FM voice only==<br />
<br />
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 &ndash; this modulates the main high level carrier with audio rather than video (the two audio phono connectors &ndash; red and white &ndash; can be ignored). On RX, the yellow phono connector of the receiver is simply connected to a line level input of an audio amplifier. <br />
<br />
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 &ndash; 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.<br />
<br />
==Activity hot spots==<br />
<br />
There is a Google map showing approximate locations of stations thought to be active on 5.6GHz FM &ndash; 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<br />
<br />
Known users include:<br />
<br />
*Southern England = G8GKQ, G8GTZ, G0UHY, G8XZD, G4UVZ, G3VPF<br />
*Dunstable area = M0SKM, G4CPE, G0WFT<br />
*North-East = GB3KM, G1LPS, M0DTS<br />
*Cheltenham = G0LGS, M0RKX and G4NZV (using WB audio only)<br />
*Bolton Wireless Club = G4JLG, G6GVI, G8PEF, M0UFC, MW1FGQ (PW “Siren” Article)<br />
*Ludlow, Shropshire = G8XYJ<br />
*Yorkshire = G8BYN<br />
*Norfolk = G4NJJ, G8JAN, G4WVU and M1BKF<br />
*Cumbria - Barrow-in-Furness Radio Club project<br />
*Merseyside - G3NWR<br />
*Northern Ireland = GI4DOH, GI3VAF, GI0GDP, GI7UGV<br />
<br />
[[File:cpe2.jpg|400px]]<br />
<br />
==More information==<br />
<br />
Dave G8GKQ did a presentation at the BATC annual convention CAT17 in September 2017 on getting started on 5.6GHz ATV.<br />
*The presentation is available here https://wiki.batc.org.uk/images/4/42/CAT17_5.6_GHzv2.pdf<br />
*The video of the session is available on the BATC YouTube channel here https://www.youtube.com/watch?v=XJzGNsGmE9Y<br />
<br />
==On line support / social media==<br />
<br />
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<br />
<br />
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.<br />
<br />
==Technical information==<br />
<br />
===SM201R===<br />
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! <br />
<br />
[[File:sm201r 2.jpg|500px]] [[File:sm201r 3.JPG|200px]]<br />
<br />
<br />
[[File:sm201r 1.JPG|500px]]<br />
<br />
===S meter output===<br />
<br />
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.<br />
<br />
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.<br />
<br />
====Tx and Rx perfomance====<br />
<br />
Initial measurements suggest the TX bandwidth is 25&mdash;30MHz.<br />
<br />
[[File:5.6GHz spectrum.jpg|500px]]<br />
<br />
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.<br />
<br />
===Channel Listings===<br />
<br />
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:<br />
<br />
[[File:Tarot_Channels.jpg|603px]]<br />
<br />
And this is the table for the Eachine TS835 transmitter:<br />
<br />
[[File:Channels_2.jpg|619px]]<br />
<br />
This table is from a "Fat Shark" transmitter that does not cover 5665 MHz:<br />
<br />
[[File:Fat_Shark.PNG|300px]]<br />
<br />
==Improvements to Commercial Units==<br />
<br />
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.<br />
[[File:BandaBase.jpg|672px]]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_4_Pluto&diff=9180Portsdown 4 Pluto2022-02-12T08:05:10Z<p>G4FRE: /* Limitations */</p>
<hr />
<div><br />
Evariste, F5OEO has produced firmware for the Pluto SDR which enables it to be a very capable DATV modulator. This firmware has 2 modes.<br />
<br />
* RTMP stream Input<br />
* Webpage Control with UDP stream input.<br />
<br />
The RTMP stream input mode is very suitable for use in small systems and this is what is used by the Portsdown.<br />
<br />
The Webpage control mode is ideal for desktop computers and is continually being developed. It is not suitable for use with the Portsdown. <br />
<br />
===Mode of Operation===<br />
<br />
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.<br />
<br />
===Suitable Pluto Firmware===<br />
<br />
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.<br />
<br />
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.<br />
<br />
===Powering the Pluto===<br />
<br />
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.<br />
<br />
===Current Functionality===<br />
<br />
* H264 only. No MPEG-2 or H265 (even when using IPTS In)<br />
* 4:3 SD, 16:9 or 720p. No 1080p<br />
* 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.<br />
* Maximum frequency 4.1 GHz (so no 6 cm band).<br />
* I have seen it work well on symbol rates between 125 and 1000 kS.<br />
* DVB-S or DVB-S2<br />
* DVB-T from 150 kHz to 1 MHz bandwidth<br />
* Video source Pi Cam (must have USB audio dongle connected as well), Comp Video, old-style C920, Test card, Contest or LKV373A HDMI.<br />
* Pluto and RPi GPIO PTT switching implemented.<br />
* H264 IPTS In for both DVB-S/S2 output and DVB-T output<br />
<br />
===Limitations===<br />
<br />
* 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.<br />
* 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.<br />
* 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.<br />
* 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.<br />
* Transmitting only a carrier is not supported by the Pluto firmware</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_hardware&diff=9115Portsdown hardware2022-01-03T10:15:05Z<p>G4FRE: /* LimeSDR */</p>
<hr />
<div>This page describes all the hardware modules and interconnections required to build the Portsdown DATV system.<br />
<br />
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. <br />
<br />
<br />
===Raspberry Pi ===<br />
<br />
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).<br />
<br />
The Raspberry Pi 4 can run hot, so using a heatsink case or fan to cool it is recommended.<br />
<br />
===Power Supplies ===<br />
<br />
You will also need a GOOD 3amp 5v power supply for the Raspberry Pi.<br />
<br />
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.<br />
<br />
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.<br />
<br />
[[File:flash.jpg|200px]]<br />
<br />
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!<br />
<br />
You may also need a 12 volt DC supply to power the other Portsdown components.<br />
<br />
===Micro-SD Card===<br />
<br />
You then need an SD card with the Portsdown software on it. <br />
<br />
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]. <br />
<br />
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.<br />
<br />
===LCD Touchscreen===<br />
<br />
The touchscreen is required to control the transmitter without the use of another computer.<br />
<br />
'''Do not buy a touchscreen that connects through the RPi HDMI connector - it is NOT supported.'''<br />
<br />
===7" Touchscreen===<br />
<br />
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). <br />
<br />
[[File:7_inch_screen.jpg|400px]]<br />
<br />
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.<br />
<br />
===3.5" Touchscreen"===<br />
<br />
'''Note this is NOT supported on the Portsdown 4.''' <br />
<br />
The other supported touchscreen on Portsdown 2020 is a 3.5 inch diagonal Waveshare Raspberry Pi LCD (Model A, not Model B). <br />
<br />
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.<br />
<br />
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]].<br />
<br />
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 <br />
This 3D print design mounts it at an angle: https://www.thingiverse.com/thing:1920486.<br />
<br />
Note that, when mounted, none of the touchscreen sensitive areas should be in contact with the surround.<br />
<br />
===GPIO Extender Card===<br />
<br />
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. <br />
<br />
Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely. <br />
<br />
<br />
[[File:screw t.jpg|400px]]<br />
<br />
The BATC card is very simple to construct with no components other than plugs and sockets.<br />
<br />
For full construction details and a list of suppliers for the plugs and sockets see [[GPIO breakout|the GPIO breakout page]]<br />
<br />
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]<br />
<br />
===LimeSDR ===<br />
<br />
The Portsdown system can use the LimeSDR Mini (or LimeSDR USB) to provide the modulator and RF generator functions. <br />
<br />
[[File:LimeMini.jpg|400px]]<br />
<br />
[[Using LimeSDR with Portsdown|See this page]] for more details on using the LimeSDR in a Portsdown system.<br />
<br />
===Pluto SDR===<br />
<br />
The Portsdown 4 uses the Pluto SDR connected via the USB port to provide the modulator and RF generator functions.<br />
<br />
See this page for more details: [[Portsdown_4_Pluto]]<br />
<br />
----------------------<br />
<br />
'''You now have the components for a fully working Portsdown transmitter!<br />
<br />
---------------------<br />
<br />
'''''However, you will need a camera and audio input to transmit pictures and sound.'''''<br />
<br />
===Raspberry Pi Camera===<br />
<br />
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. <br />
<br />
Raspberry Pi Camera: CPC Farnell http://cpc.farnell.com/raspberry-pi/rpi-8mp-camera-board/raspberry-pi-camera-board-8mp/dp/SC14028<br />
<br />
===Optional RPi camera Extension Lead Kit===<br />
<br />
The RPi camera gives excellent results, but only comes with a short ribbon cable to connect it to the RPi. <br />
<br />
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. <br />
<br />
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.<br />
<br />
RPi Camera HDMI Lead Extension Kit: https://www.tindie.com/products/freto/pi-camera-hdmi-cable-extension/<br />
<br />
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.]]<br />
<br />
===WebCams===<br />
<br />
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]].<br />
<br />
===Composite Video Capture Device===<br />
<br />
The transmitter is also capable of working with a USB-connected “EasyCap” dongle to capture PAL composite video from camcorders and analogue mixers etc.<br />
<br />
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.<br />
<br />
<br />
[[File:Fushicai.JPG|200px]]<br />
<br />
===Audio Capture Device===<br />
<br />
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:<br />
<br />
[[File:04 USB Audio.png|200px]]<br />
<br />
Other stand-alone USB audio capture devices may not work and the software will not be changed to support them. Please don't ask.<br />
<br />
This type of audio capture device is also compatible with the Ryde DATV Receiver and the Langstone Microwave transceiver.<br />
<br />
-----------------------------<br />
'''That completes the basic Portsdown transmitter shopping list'''<br />
<br />
---------------------<br />
'''''However, the team has designed some additional components to enable you to build a complete DATV transmit system'''''<br />
<br />
===RF Switching===<br />
<br />
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.<br />
<br />
[[File:20190511 Portsdown RF Switching.jpg|600px]]<br />
<br />
===4-Band RF Output Switch===<br />
<br />
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.<br />
<br />
[[File:Pd out SW.jpg|300px]]<br />
<br />
Full details including parts list and schematic are available [[RF output switch|on this wiki page]].<br />
<br />
<br />
===4-Band Decode Switch===<br />
<br />
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. <br />
<br />
[[File:Band decoder.JPG|200px]]<br />
<br />
<br />
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. <br />
Full details on the board including circuit etc [[PTT and band switching|are available here.]]<br />
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-transmitter-4-band-decode-blank-pcb/ BATC shop - item 5].<br />
<br />
===8-Band RF Output Switch===<br />
<br />
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.<br />
<br />
Full details including parts list and schematic are available [[8-Band RF Output Switch|on this wiki page]].<br />
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-way-rf-output-switch-blank-pcb/ BATC shop - item 9].<br />
<br />
===8-Band Decoder===<br />
<br />
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.<br />
<br />
Full details on the board including circuit etc [[8-Band Decoder|are available here.]]<br />
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-band-decode-blank-pcb/ BATC shop - item 7].<br />
<br />
===8-Band Decode PIC===<br />
<br />
This is the pre=programmed PIC to control the custom designed 8 band decode board for the Portsdown transmitter.<br />
<br />
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-band-decode-pic/ BATC shop - item 8].<br />
<br />
===2-Way RF Switch===<br />
<br />
Not required for Portsdown 4.<br />
<br />
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]].<br />
<br />
===Filters and PA drivers===<br />
<br />
It is absolutely essential that the Portsdown transmitter output is followed by suitable bandpass filters. <br />
These are not included as part of the project but a [[Filters|number of designs and suppliers are listed here.]]<br />
<br />
===Output Attenuator===<br />
<br />
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.<br />
<br />
[[File:PE43073 post-mod small.jpg|400px]]<br />
<br />
These attenuators are available on eBay. Full details and wiring instructions are detailed here: [[Output Attenuator]].</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_hardware&diff=9114Portsdown hardware2022-01-03T10:14:26Z<p>G4FRE: /* LimeSDR */</p>
<hr />
<div>This page describes all the hardware modules and interconnections required to build the Portsdown DATV system.<br />
<br />
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. <br />
<br />
<br />
===Raspberry Pi ===<br />
<br />
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).<br />
<br />
The Raspberry Pi 4 can run hot, so using a heatsink case or fan to cool it is recommended.<br />
<br />
===Power Supplies ===<br />
<br />
You will also need a GOOD 3amp 5v power supply for the Raspberry Pi.<br />
<br />
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.<br />
<br />
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.<br />
<br />
[[File:flash.jpg|200px]]<br />
<br />
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!<br />
<br />
You may also need a 12 volt DC supply to power the other Portsdown components.<br />
<br />
===Micro-SD Card===<br />
<br />
You then need an SD card with the Portsdown software on it. <br />
<br />
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]. <br />
<br />
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.<br />
<br />
===LCD Touchscreen===<br />
<br />
The touchscreen is required to control the transmitter without the use of another computer.<br />
<br />
'''Do not buy a touchscreen that connects through the RPi HDMI connector - it is NOT supported.'''<br />
<br />
===7" Touchscreen===<br />
<br />
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). <br />
<br />
[[File:7_inch_screen.jpg|400px]]<br />
<br />
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.<br />
<br />
===3.5" Touchscreen"===<br />
<br />
'''Note this is NOT supported on the Portsdown 4.''' <br />
<br />
The other supported touchscreen on Portsdown 2020 is a 3.5 inch diagonal Waveshare Raspberry Pi LCD (Model A, not Model B). <br />
<br />
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.<br />
<br />
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]].<br />
<br />
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 <br />
This 3D print design mounts it at an angle: https://www.thingiverse.com/thing:1920486.<br />
<br />
Note that, when mounted, none of the touchscreen sensitive areas should be in contact with the surround.<br />
<br />
===GPIO Extender Card===<br />
<br />
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. <br />
<br />
Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely. <br />
<br />
<br />
[[File:screw t.jpg|400px]]<br />
<br />
The BATC card is very simple to construct with no components other than plugs and sockets.<br />
<br />
For full construction details and a list of suppliers for the plugs and sockets see [[GPIO breakout|the GPIO breakout page]]<br />
<br />
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]<br />
<br />
===LimeSDR ===<br />
<br />
The Portsdown system can use the LimeSDR Mini (or LimeSDR USB) to provide the modulator and RF generator functions. <br />
<br />
[[File:LimeMini.jpg|400px]]<br />
<br />
[[Using LimeSDR with Portsdown|See this page]] for more details on using the LimeSDR Mini in a Portsdown system.<br />
<br />
===Pluto SDR===<br />
<br />
The Portsdown 4 uses the Pluto SDR connected via the USB port to provide the modulator and RF generator functions.<br />
<br />
See this page for more details: [[Portsdown_4_Pluto]]<br />
<br />
----------------------<br />
<br />
'''You now have the components for a fully working Portsdown transmitter!<br />
<br />
---------------------<br />
<br />
'''''However, you will need a camera and audio input to transmit pictures and sound.'''''<br />
<br />
===Raspberry Pi Camera===<br />
<br />
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. <br />
<br />
Raspberry Pi Camera: CPC Farnell http://cpc.farnell.com/raspberry-pi/rpi-8mp-camera-board/raspberry-pi-camera-board-8mp/dp/SC14028<br />
<br />
===Optional RPi camera Extension Lead Kit===<br />
<br />
The RPi camera gives excellent results, but only comes with a short ribbon cable to connect it to the RPi. <br />
<br />
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. <br />
<br />
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.<br />
<br />
RPi Camera HDMI Lead Extension Kit: https://www.tindie.com/products/freto/pi-camera-hdmi-cable-extension/<br />
<br />
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.]]<br />
<br />
===WebCams===<br />
<br />
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]].<br />
<br />
===Composite Video Capture Device===<br />
<br />
The transmitter is also capable of working with a USB-connected “EasyCap” dongle to capture PAL composite video from camcorders and analogue mixers etc.<br />
<br />
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.<br />
<br />
<br />
[[File:Fushicai.JPG|200px]]<br />
<br />
===Audio Capture Device===<br />
<br />
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:<br />
<br />
[[File:04 USB Audio.png|200px]]<br />
<br />
Other stand-alone USB audio capture devices may not work and the software will not be changed to support them. Please don't ask.<br />
<br />
This type of audio capture device is also compatible with the Ryde DATV Receiver and the Langstone Microwave transceiver.<br />
<br />
-----------------------------<br />
'''That completes the basic Portsdown transmitter shopping list'''<br />
<br />
---------------------<br />
'''''However, the team has designed some additional components to enable you to build a complete DATV transmit system'''''<br />
<br />
===RF Switching===<br />
<br />
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.<br />
<br />
[[File:20190511 Portsdown RF Switching.jpg|600px]]<br />
<br />
===4-Band RF Output Switch===<br />
<br />
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.<br />
<br />
[[File:Pd out SW.jpg|300px]]<br />
<br />
Full details including parts list and schematic are available [[RF output switch|on this wiki page]].<br />
<br />
<br />
===4-Band Decode Switch===<br />
<br />
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. <br />
<br />
[[File:Band decoder.JPG|200px]]<br />
<br />
<br />
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. <br />
Full details on the board including circuit etc [[PTT and band switching|are available here.]]<br />
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-transmitter-4-band-decode-blank-pcb/ BATC shop - item 5].<br />
<br />
===8-Band RF Output Switch===<br />
<br />
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.<br />
<br />
Full details including parts list and schematic are available [[8-Band RF Output Switch|on this wiki page]].<br />
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-way-rf-output-switch-blank-pcb/ BATC shop - item 9].<br />
<br />
===8-Band Decoder===<br />
<br />
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.<br />
<br />
Full details on the board including circuit etc [[8-Band Decoder|are available here.]]<br />
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-band-decode-blank-pcb/ BATC shop - item 7].<br />
<br />
===8-Band Decode PIC===<br />
<br />
This is the pre=programmed PIC to control the custom designed 8 band decode board for the Portsdown transmitter.<br />
<br />
Blank PCBs are available in the [https://batc.org.uk/shop/portsdown-8-band-decode-pic/ BATC shop - item 8].<br />
<br />
===2-Way RF Switch===<br />
<br />
Not required for Portsdown 4.<br />
<br />
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]].<br />
<br />
===Filters and PA drivers===<br />
<br />
It is absolutely essential that the Portsdown transmitter output is followed by suitable bandpass filters. <br />
These are not included as part of the project but a [[Filters|number of designs and suppliers are listed here.]]<br />
<br />
===Output Attenuator===<br />
<br />
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.<br />
<br />
[[File:PE43073 post-mod small.jpg|400px]]<br />
<br />
These attenuators are available on eBay. Full details and wiring instructions are detailed here: [[Output Attenuator]].</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Es%27hail-2_Basic_Information&diff=9113Es'hail-2 Basic Information2022-01-02T14:49:14Z<p>G4FRE: /* Aligning for DATV */</p>
<hr />
<div>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<br />
<br />
[[File:seperation.JPG|400px]]<br />
<br />
The satellite was built by Mitsubishi Electric Company ( MELCO) in Japan and is a collaborative project with Es’hailSat / AMSAT-DL / Qatar ARS <br />
<br />
For more details see this presentation given by G8GTZ and G8GKQ at the RSGB AGM 2019.<br />
<br />
[[:File:RSGB AGM V2.pdf]]<br />
<br />
<br />
==Aligning your dish==<br />
<br />
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]]<br />
<br />
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.<br />
<br />
More details on LNBs, including modifying the Octagon units for external lock can be found here: [[Es'hail-2_LNBs_and_Antennaes]]<br />
<br />
====Narrow band transponder====<br />
<br />
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.<br />
<br />
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.<br />
<br />
====Aligning for DATV====<br />
<br />
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.<br />
<br />
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<br />
<br />
==Receiving Oscar 100 DATV signals==<br />
<br />
A guide to receiving the DATV signals in the wideband transponder can be found here [[Receiving Oscar 100 DATV signals]]<br />
<br />
==Transmitting DATV on Oscar 100==<br />
<br />
A guide to transmitting DATV in the wideband transponder can be found here [[Transmitting Oscar 100 DATV signals]]<br />
<br />
==List of Current Active Users==<br />
<br />
[[QO100 DATV Users]]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Noise_Source_PSU&diff=9075Noise Source PSU2021-12-05T20:56:20Z<p>G4FRE: </p>
<hr />
<div>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.<br />
<br />
[[File:Noise Head PSU.jpg|437px]]<br />
<br />
[[File:NF_Schematic_Extract.JPG|917px]]<br />
<br />
The full schematic is here [[:Media:NoiseHeadPSU.pdf]]<br />
<br />
The Bill of Materials is here. [[:File:NF Switch BOM.xlsx]]<br />
<br />
===Design and Operation===<br />
<br />
The Noise Source PSU has 4 distinct circuit functions:<br />
<br />
====Voltage Step-up====<br />
<br />
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.<br />
<br />
====Current Limiting====<br />
<br />
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. <br />
<br />
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.<br />
<br />
====Voltage Regulation====<br />
<br />
The second LM317T (U3) regulates the output voltage to 28v. If jumper 1 is made, the output voltage is set to 12v.<br />
<br />
====Switching====<br />
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.<br />
<br />
===Construction===<br />
<br />
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.<br />
<br />
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.<br />
<br />
===Measured Performance===<br />
<br />
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.<br />
<br />
The current limiting was measured at 56ma; a typical noise head drwas 10ma.<br />
<br />
===Error on the First Batch of PCBs===<br />
<br />
The Initial batch of PCBs for the Noise source power supply had one error.<br />
The Vout and Adj pins on the current-limiting LM317T (U2) were reversed.<br />
The unit functions if assembled with the error, but the current limit will not work correctly. <br />
To correct the error, the PCB should be modified as shown below, or pins 1 and 2 on U2 should be swapped.<br />
<br />
[[File:Incorrect wiring.png|263px]] [[File:Correct wiring.png|268px]]<br />
<br />
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.<br />
<br />
[[File:NF Switch PCB Mod.JPG|414px]]<br />
<br />
<br />
After Modification:<br />
<br />
[[File:Repair 1.jpg|489px]]<br />
<br />
Cut track 1 and wire link 3<br />
<br />
[[File:Repair 2.jpg|555px]]<br />
<br />
Cut track 2 and wire link 5</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Noise_Source_PSU&diff=9074Noise Source PSU2021-12-05T20:55:16Z<p>G4FRE: </p>
<hr />
<div>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.<br />
<br />
[[File:Noise Head PSU.jpg|437px]]<br />
<br />
[[File:NF_Schematic_Extract.JPG|917px]]<br />
<br />
The full schematic is here [[:Media:NoiseHeadPSU.pdf]]<br />
<br />
The Bill of Materials is here. [[:File:NF Switch BOM.xlsx]]<br />
<br />
===Design and Operation===<br />
<br />
The Noise Source PSU has 4 distinct circuit functions:<br />
<br />
====Voltage Step-up====<br />
<br />
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.<br />
<br />
====Current Limiting====<br />
<br />
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. <br />
<br />
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.<br />
<br />
====Voltage Regulation====<br />
<br />
The second LM317T (U3) regulates the output voltage to 28v. If jumper 1 is made, the output voltage is set to 12v.<br />
<br />
====Switching====<br />
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.<br />
<br />
===Construction===<br />
<br />
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.<br />
<br />
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.<br />
<br />
===Measured Performance===<br />
<br />
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.<br />
<br />
The current limiting was measured at 56ma; a typical noise head drwas 10ma.<br />
<br />
===Error on the First Batch of PCBs===<br />
<br />
The Initial batch of PCBs for the Noise source power supply had one error.<br />
The Vout and Adj pins on the current-limiting LM317T (U2) were reversed.<br />
The unit functions if assembled with the error, but the current limit will not work correctly. <br />
To correct the error, the PCB should be modified as shown below, or pins 1 and 2 on U2 should be swapped.<br />
<br />
[[File:Incorrect wiring.png|263px]] [[File:Correct wiring.png|268px]]<br />
<br />
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.<br />
<br />
[[File:NF Switch PCB Mod.JPG|414px]]<br />
<br />
<br />
After Modification:<br />
<br />
[[File:Repair 1.jpg|489px]]<br />
<br />
Cut track 1 and wire link 3<br />
<br />
[[File:Repair 2.jpg|555px]]<br />
<br />
Cut track 2 and wire link 5</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_NF_Meter&diff=8986Portsdown NF Meter2021-11-03T11:03:38Z<p>G4FRE: /* Measuring a transverter / rx converter */</p>
<hr />
<div>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.<br />
<br />
===General Principle===<br />
<br />
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.<br />
<br />
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.<br />
<br />
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 .<br />
<br />
===Equipment Required===<br />
<br />
To measure noise figure using the Portsdown 4, a Lime SDR Mini, calibrated noise source and matching switched power supply are required.<br />
<br />
====Noise heads====<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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<br />
<br />
Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart. <br />
<br />
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.<br />
<br />
====Noise head PSU====<br />
<br />
The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again. <br />
<br />
Many professional noise sources (as used by HP) need a 28v supply in their on state. <br />
<br />
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. <br />
<br />
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.<br />
<br />
===Preparing for a Measurement===<br />
<br />
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.<br />
<br />
Connect your switched power supply to pin 26 of the Portsdown GPIO.<br />
<br />
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.<br />
<br />
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.<br />
<br />
[[File:nfmeter.jpg|400px]]<br />
<br />
===Setup Menu===<br />
<br />
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.<br />
<br />
====Setting the Measurement Frequency====<br />
<br />
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. <br />
<br />
====Measurment bandwidth====<br />
<br />
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.<br />
<br />
====ENR====<br />
<br />
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). <br />
<br />
====Lime gain====<br />
<br />
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.<br />
<br />
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.<br />
<br />
===Measuring a transverter / rx converter===<br />
<br />
When measuring a transverter '''the measurement frequency should be the IF frequency'''. <br />
<br />
However, the '''ENR of the noise head should be for the signal frequency''', NOT the IF frequency.<br />
<br />
Great care needs to be taken, by using IF filtering, to ensure no local oscillator signals are presented to the lime receiver<br />
<br />
===Making a Simple Measurement===<br />
<br />
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. <br />
<br />
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.<br />
<br />
===Measuring Gain and NF of a Preamp===<br />
<br />
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.<br />
<br />
Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.<br />
<br />
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.<br />
<br />
[[File:nfdevice.jpg|400px]]<br />
<br />
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.<br />
<br />
===Meter Scale===<br />
<br />
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.<br />
<br />
===Sources of Error===<br />
<br />
Interference in the passband. Not the DC spike - this is ignored.<br />
<br />
Noise Source reflection coefficient changes between the on and off state.<br />
<br />
SDR non-linearity<br />
<br />
Temperature effects<br />
<br />
===References:===<br />
<br />
[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]<br />
<br />
[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]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_NF_Meter&diff=8985Portsdown NF Meter2021-11-03T11:00:39Z<p>G4FRE: /* Equipment Required */</p>
<hr />
<div>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.<br />
<br />
===General Principle===<br />
<br />
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.<br />
<br />
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.<br />
<br />
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 .<br />
<br />
===Equipment Required===<br />
<br />
To measure noise figure using the Portsdown 4, a Lime SDR Mini, calibrated noise source and matching switched power supply are required.<br />
<br />
====Noise heads====<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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<br />
<br />
Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart. <br />
<br />
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.<br />
<br />
====Noise head PSU====<br />
<br />
The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again. <br />
<br />
Many professional noise sources (as used by HP) need a 28v supply in their on state. <br />
<br />
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. <br />
<br />
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.<br />
<br />
===Preparing for a Measurement===<br />
<br />
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.<br />
<br />
Connect your switched power supply to pin 26 of the Portsdown GPIO.<br />
<br />
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.<br />
<br />
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.<br />
<br />
[[File:nfmeter.jpg|400px]]<br />
<br />
===Setup Menu===<br />
<br />
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.<br />
<br />
====Setting the Measurement Frequency====<br />
<br />
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. <br />
<br />
====Measurment bandwidth====<br />
<br />
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.<br />
<br />
====ENR====<br />
<br />
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). <br />
<br />
====Lime gain====<br />
<br />
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.<br />
<br />
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.<br />
<br />
===Measuring a transverter / rx converter===<br />
<br />
When measuring a transverter '''the measurement frequency should be the IF frequency'''. <br />
<br />
However, the '''ENR of the noise head should be for the signal frequency''', NOT the IF frequency.<br />
<br />
===Making a Simple Measurement===<br />
<br />
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. <br />
<br />
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.<br />
<br />
===Measuring Gain and NF of a Preamp===<br />
<br />
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.<br />
<br />
Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.<br />
<br />
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.<br />
<br />
[[File:nfdevice.jpg|400px]]<br />
<br />
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.<br />
<br />
===Meter Scale===<br />
<br />
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.<br />
<br />
===Sources of Error===<br />
<br />
Interference in the passband. Not the DC spike - this is ignored.<br />
<br />
Noise Source reflection coefficient changes between the on and off state.<br />
<br />
SDR non-linearity<br />
<br />
Temperature effects<br />
<br />
===References:===<br />
<br />
[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]<br />
<br />
[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]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_NF_Meter&diff=8984Portsdown NF Meter2021-11-03T10:59:31Z<p>G4FRE: </p>
<hr />
<div>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.<br />
<br />
===General Principle===<br />
<br />
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.<br />
<br />
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.<br />
<br />
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 .<br />
<br />
===Equipment Required===<br />
<br />
To measure noise figure using the Portsdown 4, a Lime SDR Mini, calibrated noise source and matching switched power supply are required.<br />
<br />
====Noise heads====<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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<br />
<br />
Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart. <br />
<br />
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.<br />
<br />
====Noise head PSU====<br />
<br />
The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again. <br />
<br />
Many professional noise sources (as used by HP) need a 28v supply in their on state. <br />
<br />
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. <br />
<br />
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.<br />
<br />
===Preparing for a Measurement===<br />
<br />
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.<br />
<br />
Connect your switched power supply to pin 26 of the Portsdown GPIO.<br />
<br />
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.<br />
<br />
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.<br />
<br />
[[File:nfmeter.jpg|400px]]<br />
<br />
===Setup Menu===<br />
<br />
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.<br />
<br />
====Setting the Measurement Frequency====<br />
<br />
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. <br />
<br />
====Measurment bandwidth====<br />
<br />
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.<br />
<br />
====ENR====<br />
<br />
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). <br />
<br />
====Lime gain====<br />
<br />
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.<br />
<br />
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.<br />
<br />
===Measuring a transverter / rx converter===<br />
<br />
When measuring a transverter '''the measurement frequency should be the IF frequency'''. <br />
<br />
However, the '''ENR of the noise head should be for the signal frequency''', NOT the IF frequency.<br />
<br />
===Making a Simple Measurement===<br />
<br />
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. <br />
<br />
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.<br />
<br />
===Measuring Gain and NF of a Preamp===<br />
<br />
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.<br />
<br />
Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.<br />
<br />
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.<br />
<br />
[[File:nfdevice.jpg|400px]]<br />
<br />
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.<br />
<br />
===Meter Scale===<br />
<br />
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.<br />
<br />
===Sources of Error===<br />
<br />
Interference in the passband. Not the DC spike - this is ignored.<br />
<br />
Noise Source reflection coefficient changes between the on and off state.<br />
<br />
SDR non-linearity<br />
<br />
Temperature effects<br />
<br />
===References:===<br />
<br />
[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]<br />
<br />
[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]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_NF_Meter&diff=8983Portsdown NF Meter2021-11-03T10:54:29Z<p>G4FRE: /* Noise heads */</p>
<hr />
<div>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.<br />
<br />
===General Principle===<br />
<br />
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.<br />
<br />
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.<br />
<br />
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 .<br />
<br />
===Equipment Required===<br />
<br />
To measure noise figure using the Portsdown 4, a Lime SDR Mini, calibrated noise source and matching switched power supply are required.<br />
<br />
====Noise heads====<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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<br />
<br />
Secondhand heads are often available for sale but can be quite expensive, particularly if they have an up-to-date calibration chart. <br />
<br />
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.<br />
<br />
====Noise head PSU====<br />
<br />
The switched power supply needs to turn the noise source on when commanded to by the Portsdown 4 and then turn it off again. <br />
<br />
Many professional noise sources (as used by HP) need a 28v supply in their on state. <br />
<br />
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. <br />
<br />
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.<br />
<br />
===Preparing for a Measurement===<br />
<br />
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.<br />
<br />
Connect your switched power supply to pin 26 of the Portsdown GPIO.<br />
<br />
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.<br />
<br />
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.<br />
<br />
[[File:nfmeter.jpg|400px]]<br />
<br />
===Setup Menu===<br />
<br />
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.<br />
<br />
====Setting the Measurement Frequency====<br />
<br />
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. <br />
<br />
====Measurment bandwidth====<br />
<br />
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.<br />
<br />
====ENR====<br />
<br />
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). <br />
<br />
====Lime gain====<br />
<br />
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.<br />
<br />
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.<br />
<br />
===Measuring a transverter / rx converter===<br />
<br />
When measuring a transverter '''the measurement frequency should be the IF frequency'''. <br />
<br />
However, the '''ENR of the noise head should be for the signal frequency''', NOT the IF frequency.<br />
<br />
===Making a Simple Measurement===<br />
<br />
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. <br />
<br />
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.<br />
<br />
===Measuring Gain and NF of a Preamp===<br />
<br />
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.<br />
<br />
Note that this calibration procedure is not the same as calibrating the LimeSDR; it is calibrating the noise response of the LimeSDR.<br />
<br />
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.<br />
<br />
[[File:nfdevice.jpg|400px]]<br />
<br />
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.<br />
<br />
===Meter Scale===<br />
<br />
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.<br />
<br />
===Sources of Error===<br />
<br />
Interference in the passband. Not the DC spike - this is ignored.<br />
<br />
Noise Source reflection coefficient changes between the on and off state.<br />
<br />
SDR non-linearity<br />
<br />
Temperature effects<br />
<br />
===References:===<br />
<br />
[https://web.stanford.edu/class/ee133/appnotes/5952-8255E.pdf Agilent Application Note 57-1: Fundamentals of RF and Microwave Noise Figure Measurements]<br />
<br />
[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]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=2018_-_2023_CQ-TV_261_to_CQ-TV_280&diff=89522018 - 2023 CQ-TV 261 to CQ-TV 2802021-10-31T11:49:11Z<p>G4FRE: /* Issue 263 Spring 2019 */</p>
<hr />
<div>Copies of CQ-TV more than 2 years old are free to download at https://batc.org.uk/cq-tv/cq-tv-archive/<br />
<br />
=====Issue 267 Spring 2020=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|One Year of Operation for the Goonhilly WebSDRs for QO-100<br />
|8<br />
|- <br />
|Neat Housing for the Portsdown 7-Inch Screen with Pi Camera<br />
|9<br />
|-<br />
|ATV repeater PI6ATS<br />
|10<br />
|-<br />
|Electronic push button on-off switch for the Portsdown<br />
|12<br />
|-<br />
|DATV Activity in North Northamptonshire<br />
|13<br />
|-<br />
|CQ-TV, the BATC and you, our members<br />
|14<br />
|- <br />
|A new controller for VK2RTS<br />
|15<br />
|-<br />
|Don Saunders, G0WFT - silent key<br />
|18<br />
|-<br />
|DATV repeater receiver with active video switch<br />
|19<br />
|-<br />
|BBC MCR21’s Sound Mixer Desk and audio systems<br />
|21<br />
|-<br />
|Remote Repeater and Station Monitoring with Modbus (Part 1)<br />
|23<br />
|-<br />
|Video production with a smartphone part two<br />
|27<br />
|-<br />
|Revived Terrestrial Activity<br />
|28<br />
|-<br />
|Portsdown Newsletter<br />
|29<br />
|-<br />
|A 10 Watt Linear Amplifier for 70cms DATV or narrowband modes<br />
|30<br />
|-<br />
|A compact 12 volt Beam Antenna rotator<br />
|31<br />
|-<br />
|Turning Back the Pages - CQ-TV 78<br />
|32<br />
|}<br />
<br />
=====Issue 266 Winter 2019=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|A New Repeater Transmission Standard for the 2020s<br />
|9<br />
|- <br />
|BATC report to the RSGB Spectrum Forum<br />
|12<br />
|-<br />
|ADALM-PLUTO DATV TX – “How To”<br />
|14<br />
|-<br />
|A 30 watt driver amplifier for 2.4 GHz<br />
|19<br />
|-<br />
|Out portable for the BATC November Activity weekend<br />
|21<br />
|-<br />
|5.6 GHz TV Receiver<br />
|22<br />
|- <br />
|Using the Jetson Nano with the LongMynd software<br />
|25<br />
|-<br />
|GB3ET Repeater<br />
|27<br />
|-<br />
|Video Fundamentals 20 - Outside Broadcast Vans<br />
|28<br />
|-<br />
|Portsdown Newsletter<br />
|30<br />
|-<br />
|25 MHz reference, biasT and diplexer for QO-100<br />
|31<br />
|-<br />
|The Secret Life of a TV Repeater<br />
|33<br />
|-<br />
|Jamboree on the Air and QO-100<br />
|35<br />
|-<br />
|CAT 19 South - a short report<br />
|36<br />
|-<br />
|Turning Back the Pages<br />
|37<br />
|-<br />
|DATV at the SDR Makerspace Conference<br />
|39<br />
|}<br />
<br />
<br />
=====Issue 265 Autumn 2019=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|The BATC bursary scheme<br />
|7<br />
|- <br />
|IARU Region 1 ATV Contest 2019 Results<br />
|8<br />
|-<br />
|OBS and the Portsdown<br />
|10<br />
|-<br />
|Using Mitsubishi MOSFET power modules with PE1RKI kits<br />
|13<br />
|-<br />
|Telling the Story of MCR21<br />
|16<br />
|-<br />
|Video Fundamentals 19<br />
|18<br />
|- <br />
|The Jetson NanoBox<br />
|20<br />
|-<br />
|LNB power supply with current limit for MiniTiouner<br />
|22<br />
|-<br />
|A 250 Watt amplifier for Es’Hail-2 DATV<br />
|23<br />
|-<br />
|Portsdown Newsletter<br />
|26<br />
|-<br />
|The RSGB filming a new promotional video<br />
|27<br />
|-<br />
|The LimeNET Micro – a Single-board DATV Transmitter<br />
|28<br />
|-<br />
|Spectrum Matters<br />
|29<br />
|-<br />
|The LongMynd Receiver on the Portsdown<br />
|30<br />
|-<br />
|The LongMynd Receiver<br />
|32<br />
|-<br />
|The G4WIM PA controller<br />
|34<br />
|-<br />
|Turning Back the Pages - a 70 year special!<br />
|39<br />
|-<br />
|ATV at Chalon-sur-Saone fayre<br />
|43<br />
|}<br />
<br />
<br />
=====Issue 264 Summer 2019=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|BATC stand, Blackpool 2018 & 2019<br />
|8<br />
|- <br />
|BATC Members’ Shop Update<br />
|9<br />
|-<br />
|MCR21 Project Launch<br />
|12<br />
|-<br />
|23 cm QRM<br />
|13<br />
|-<br />
|Protecting Your LimeSDR Mini<br />
|14<br />
|-<br />
|Portsdown Made Simple<br />
|15<br />
|- <br />
|How to use K7FRY’s 10 Character Locator Website<br />
|16<br />
|-<br />
|Dual channel output for the BATC version 2 MiniTiouner PCB<br />
|17<br />
|-<br />
|KITTENS 19 & KITTENS 19 Activity Day<br />
|19<br />
|-<br />
|Goonhilly Spectrum Monitor and WebSDR Maintenance Visit<br />
|21<br />
|-<br />
|Video Fundamentals 18<br />
|22<br />
|-<br />
|BATC at the Kempton Park Rally<br />
|23<br />
|-<br />
|A very cheap easy to make Sync detector for<br />
analogue video<br />
|24<br />
|-<br />
|Well, I tried… 5.8GHz ATV<br />
|25<br />
|-<br />
|Video Production - with a smartphone! Part 1.<br />
|26<br />
|-<br />
|Turning Back the Pages - CQ-TV 76<br />
|28<br />
|-<br />
|MCR21 Recording its History<br />
|31<br />
|-<br />
|BATC at the Newbury Rally 2019<br />
|31<br />
|}<br />
<br />
=====Issue 263 Spring 2019=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|OSCAR- 100 has arrived!<br />
|9<br />
|- <br />
|Receiving QO-100<br />
|10<br />
|-<br />
|Transmitting Systems for QO-100 on Es’hail-2<br />
|12<br />
|-<br />
|G8LES Spectrian Amplifier mods for 2.3-2.4GHz<br />
|15<br />
|-<br />
|Portsdown Newsletter<br />
|17<br />
|-<br />
|Bias and reference injection board<br />
|19<br />
|- <br />
|Easy Hole Plating at Home<br />
|21<br />
|-<br />
|New DATV record on 76 GHz<br />
|24<br />
|-<br />
|Bristol Mini-CAT<br />
|24<br />
|-<br />
|MCR21 Progress<br />
|25<br />
|-<br />
|The old and new models of the Octagon Twin LNB<br />
|26<br />
|-<br />
|Route du Rhum<br />
|26<br />
|-<br />
|Cheap Ebay Bias Tee<br />
|27<br />
|-<br />
|Experiments with baseband digital video<br />
|28<br />
|-<br />
|A New Audio Mixer for GB3KM<br />
|32<br />
|-<br />
|BATC Website Incident<br />
|33<br />
|-<br />
|Video Fundamentals 17<br />
|34<br />
|-<br />
|3D Printed horn antennas - Part 2<br />
|35<br />
|-<br />
|Simple dual band dish feed for Es’hail-2 (POTY)<br />
|37<br />
|-<br />
|Turning Back the Pages - CQ-TV 75<br />
|41<br />
|}<br />
<br />
=====Issue 262 Winter 2018=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|BATC report to the RSGB Spectrum Forum<br />
|11<br />
|- <br />
|BATC response to WRC Agenda Item 1.1<br />
|12<br />
|-<br />
|The story behind Es’hail-2<br />
|13<br />
|-<br />
|Portsdown Support for the LimeSDR<br />
|15<br />
|-<br />
|Sydney Amateur Television goes 5.6 GHz<br />
|18<br />
|-<br />
|We were there at the launch of Es’Hail-2!<br />
|20<br />
|- <br />
|A 23cm Power Amplifier For Digital ATV<br />
|22<br />
|-<br />
|Portsdown Newsletter<br />
|25<br />
|-<br />
|I bought a 3-D printer<br />
|27<br />
|-<br />
|DVB-S DATV signal power measurement<br />
|29<br />
|-<br />
|Low band DATV<br />
|30<br />
|-<br />
|DATV on 24cms<br />
|31<br />
|-<br />
|Measuring Power on 5.6 GHz & a New Receiver<br />
|33<br />
|-<br />
|Baliu RB-TV in Catalonia<br />
|35<br />
|-<br />
|DATV over optical - Part 2: interfacing the two<br />
|36<br />
|-<br />
|Video Fundamentals 16 - Aspect Ratio re-visited<br />
|40<br />
|-<br />
|Turning Back the Pages - CQ-TV 74<br />
|41<br />
|}<br />
<br />
=====Issue 261 Autumn 2018=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|Touchscreen control of the DATV Express – part 2<br />
|9<br />
|- <br />
|CAT18 award presentations and prizes<br />
|10<br />
|-<br />
|BATC Test Equipment<br />
|11<br />
|-<br />
|Microwave roundtable construction competition winners<br />
|11<br />
|-<br />
|A Handy Signal Generator for 10GHz<br />
|12<br />
|-<br />
|Es’Hail-2 launching soon!<br />
|14<br />
|- <br />
|The Future of CAT<br />
|15<br />
|-<br />
|ATV Workshop in Shropshire<br />
|16<br />
|-<br />
|Portsdown Newsletter<br />
|17<br />
|-<br />
|DATV over optical – an introduction<br />
|19<br />
|-<br />
|CAT18 Report<br />
|21<br />
|-<br />
|BATC at Goonhilly<br />
|25<br />
|-<br />
|Video Fundamentals 15 - Wire, labelling & MCR21<br />
|26<br />
|-<br />
|Es’hail-2 Wideband Transponder<br />
|28<br />
|-<br />
|BATC members and DATV in Spain<br />
|29<br />
|-<br />
|Getting ready to receive Es’hail-2<br />
|30<br />
|-<br />
|BATC Awards Presentations at CAT18<br />
|33<br />
|-<br />
|Never mind the width - look at the quality<br />
|34<br />
|-<br />
|David Ellis Jones B.Sc, ALCM. GW8PBX (SK)<br />
|35<br />
|-<br />
|Locking the Octagon PLL LNB to an external reference<br />
|36<br />
|-<br />
|Turning Back the Pages - CQ-TV 73<br />
|37<br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=2018_-_2023_CQ-TV_261_to_CQ-TV_280&diff=89512018 - 2023 CQ-TV 261 to CQ-TV 2802021-10-31T11:48:54Z<p>G4FRE: /* Issue 263 Spring 2019 */</p>
<hr />
<div>Copies of CQ-TV more than 2 years old are free to download at https://batc.org.uk/cq-tv/cq-tv-archive/<br />
<br />
=====Issue 267 Spring 2020=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|One Year of Operation for the Goonhilly WebSDRs for QO-100<br />
|8<br />
|- <br />
|Neat Housing for the Portsdown 7-Inch Screen with Pi Camera<br />
|9<br />
|-<br />
|ATV repeater PI6ATS<br />
|10<br />
|-<br />
|Electronic push button on-off switch for the Portsdown<br />
|12<br />
|-<br />
|DATV Activity in North Northamptonshire<br />
|13<br />
|-<br />
|CQ-TV, the BATC and you, our members<br />
|14<br />
|- <br />
|A new controller for VK2RTS<br />
|15<br />
|-<br />
|Don Saunders, G0WFT - silent key<br />
|18<br />
|-<br />
|DATV repeater receiver with active video switch<br />
|19<br />
|-<br />
|BBC MCR21’s Sound Mixer Desk and audio systems<br />
|21<br />
|-<br />
|Remote Repeater and Station Monitoring with Modbus (Part 1)<br />
|23<br />
|-<br />
|Video production with a smartphone part two<br />
|27<br />
|-<br />
|Revived Terrestrial Activity<br />
|28<br />
|-<br />
|Portsdown Newsletter<br />
|29<br />
|-<br />
|A 10 Watt Linear Amplifier for 70cms DATV or narrowband modes<br />
|30<br />
|-<br />
|A compact 12 volt Beam Antenna rotator<br />
|31<br />
|-<br />
|Turning Back the Pages - CQ-TV 78<br />
|32<br />
|}<br />
<br />
=====Issue 266 Winter 2019=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|A New Repeater Transmission Standard for the 2020s<br />
|9<br />
|- <br />
|BATC report to the RSGB Spectrum Forum<br />
|12<br />
|-<br />
|ADALM-PLUTO DATV TX – “How To”<br />
|14<br />
|-<br />
|A 30 watt driver amplifier for 2.4 GHz<br />
|19<br />
|-<br />
|Out portable for the BATC November Activity weekend<br />
|21<br />
|-<br />
|5.6 GHz TV Receiver<br />
|22<br />
|- <br />
|Using the Jetson Nano with the LongMynd software<br />
|25<br />
|-<br />
|GB3ET Repeater<br />
|27<br />
|-<br />
|Video Fundamentals 20 - Outside Broadcast Vans<br />
|28<br />
|-<br />
|Portsdown Newsletter<br />
|30<br />
|-<br />
|25 MHz reference, biasT and diplexer for QO-100<br />
|31<br />
|-<br />
|The Secret Life of a TV Repeater<br />
|33<br />
|-<br />
|Jamboree on the Air and QO-100<br />
|35<br />
|-<br />
|CAT 19 South - a short report<br />
|36<br />
|-<br />
|Turning Back the Pages<br />
|37<br />
|-<br />
|DATV at the SDR Makerspace Conference<br />
|39<br />
|}<br />
<br />
<br />
=====Issue 265 Autumn 2019=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|The BATC bursary scheme<br />
|7<br />
|- <br />
|IARU Region 1 ATV Contest 2019 Results<br />
|8<br />
|-<br />
|OBS and the Portsdown<br />
|10<br />
|-<br />
|Using Mitsubishi MOSFET power modules with PE1RKI kits<br />
|13<br />
|-<br />
|Telling the Story of MCR21<br />
|16<br />
|-<br />
|Video Fundamentals 19<br />
|18<br />
|- <br />
|The Jetson NanoBox<br />
|20<br />
|-<br />
|LNB power supply with current limit for MiniTiouner<br />
|22<br />
|-<br />
|A 250 Watt amplifier for Es’Hail-2 DATV<br />
|23<br />
|-<br />
|Portsdown Newsletter<br />
|26<br />
|-<br />
|The RSGB filming a new promotional video<br />
|27<br />
|-<br />
|The LimeNET Micro – a Single-board DATV Transmitter<br />
|28<br />
|-<br />
|Spectrum Matters<br />
|29<br />
|-<br />
|The LongMynd Receiver on the Portsdown<br />
|30<br />
|-<br />
|The LongMynd Receiver<br />
|32<br />
|-<br />
|The G4WIM PA controller<br />
|34<br />
|-<br />
|Turning Back the Pages - a 70 year special!<br />
|39<br />
|-<br />
|ATV at Chalon-sur-Saone fayre<br />
|43<br />
|}<br />
<br />
<br />
=====Issue 264 Summer 2019=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|BATC stand, Blackpool 2018 & 2019<br />
|8<br />
|- <br />
|BATC Members’ Shop Update<br />
|9<br />
|-<br />
|MCR21 Project Launch<br />
|12<br />
|-<br />
|23 cm QRM<br />
|13<br />
|-<br />
|Protecting Your LimeSDR Mini<br />
|14<br />
|-<br />
|Portsdown Made Simple<br />
|15<br />
|- <br />
|How to use K7FRY’s 10 Character Locator Website<br />
|16<br />
|-<br />
|Dual channel output for the BATC version 2 MiniTiouner PCB<br />
|17<br />
|-<br />
|KITTENS 19 & KITTENS 19 Activity Day<br />
|19<br />
|-<br />
|Goonhilly Spectrum Monitor and WebSDR Maintenance Visit<br />
|21<br />
|-<br />
|Video Fundamentals 18<br />
|22<br />
|-<br />
|BATC at the Kempton Park Rally<br />
|23<br />
|-<br />
|A very cheap easy to make Sync detector for<br />
analogue video<br />
|24<br />
|-<br />
|Well, I tried… 5.8GHz ATV<br />
|25<br />
|-<br />
|Video Production - with a smartphone! Part 1.<br />
|26<br />
|-<br />
|Turning Back the Pages - CQ-TV 76<br />
|28<br />
|-<br />
|MCR21 Recording its History<br />
|31<br />
|-<br />
|BATC at the Newbury Rally 2019<br />
|31<br />
|}<br />
<br />
=====Issue 263 Spring 2019=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|OSCAR- 100 has arrived!<br />
|9<br />
|- <br />
|Receiving QO-100<br />
|10<br />
|-<br />
|Transmitting Systems for QO-100 on Es’hail-2<br />
|12<br />
|-<br />
|G8LES Spectrian Amplifier mods for 2.3-2.4GHz<br />
|15<br />
|-<br />
|Portsdown Newsletter<br />
|17<br />
|-<br />
|Bias and reference injection board<br />
|19<br />
|- <br />
|Easy Hole Plating at Home<br />
|21<br />
|-<br />
|New DATV record on 76 GHz<br />
|24<br />
|-<br />
|Bristol Mini-CAT<br />
|24<br />
|-<br />
|MCR21 Progress<br />
|25<br />
|-<br />
|The old and new models of the Octagon Twin LNB<br />
|26<br />
|-<br />
|Route du Rhum<br />
|26<br />
|-<br />
|Cheap Ebay Bias Tee<br />
|27<br />
|-<br />
|Experiments with baseband digital video<br />
|28<br />
|-<br />
|A New Audio Mixer for GB3KM<br />
|32<br />
|-<br />
|BATC Website Incident<br />
|33<br />
|-<br />
|Video Fundamentals 17<br />
|34<br />
|-<br />
|3D Printed horn antennas - Part 2<br />
|35<br />
|-<br />
|Simple dual band dish feed for Es’hail-2(POTY)<br />
|37<br />
|-<br />
|Turning Back the Pages - CQ-TV 75<br />
|41<br />
|}<br />
<br />
=====Issue 262 Winter 2018=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|BATC report to the RSGB Spectrum Forum<br />
|11<br />
|- <br />
|BATC response to WRC Agenda Item 1.1<br />
|12<br />
|-<br />
|The story behind Es’hail-2<br />
|13<br />
|-<br />
|Portsdown Support for the LimeSDR<br />
|15<br />
|-<br />
|Sydney Amateur Television goes 5.6 GHz<br />
|18<br />
|-<br />
|We were there at the launch of Es’Hail-2!<br />
|20<br />
|- <br />
|A 23cm Power Amplifier For Digital ATV<br />
|22<br />
|-<br />
|Portsdown Newsletter<br />
|25<br />
|-<br />
|I bought a 3-D printer<br />
|27<br />
|-<br />
|DVB-S DATV signal power measurement<br />
|29<br />
|-<br />
|Low band DATV<br />
|30<br />
|-<br />
|DATV on 24cms<br />
|31<br />
|-<br />
|Measuring Power on 5.6 GHz & a New Receiver<br />
|33<br />
|-<br />
|Baliu RB-TV in Catalonia<br />
|35<br />
|-<br />
|DATV over optical - Part 2: interfacing the two<br />
|36<br />
|-<br />
|Video Fundamentals 16 - Aspect Ratio re-visited<br />
|40<br />
|-<br />
|Turning Back the Pages - CQ-TV 74<br />
|41<br />
|}<br />
<br />
=====Issue 261 Autumn 2018=====<br />
{| class="wikitable" ;" <br />
! style="width:400px; text-align:left;"|Article <br />
! style="text-align:left;"|Page<br />
|-<br />
|Touchscreen control of the DATV Express – part 2<br />
|9<br />
|- <br />
|CAT18 award presentations and prizes<br />
|10<br />
|-<br />
|BATC Test Equipment<br />
|11<br />
|-<br />
|Microwave roundtable construction competition winners<br />
|11<br />
|-<br />
|A Handy Signal Generator for 10GHz<br />
|12<br />
|-<br />
|Es’Hail-2 launching soon!<br />
|14<br />
|- <br />
|The Future of CAT<br />
|15<br />
|-<br />
|ATV Workshop in Shropshire<br />
|16<br />
|-<br />
|Portsdown Newsletter<br />
|17<br />
|-<br />
|DATV over optical – an introduction<br />
|19<br />
|-<br />
|CAT18 Report<br />
|21<br />
|-<br />
|BATC at Goonhilly<br />
|25<br />
|-<br />
|Video Fundamentals 15 - Wire, labelling & MCR21<br />
|26<br />
|-<br />
|Es’hail-2 Wideband Transponder<br />
|28<br />
|-<br />
|BATC members and DATV in Spain<br />
|29<br />
|-<br />
|Getting ready to receive Es’hail-2<br />
|30<br />
|-<br />
|BATC Awards Presentations at CAT18<br />
|33<br />
|-<br />
|Never mind the width - look at the quality<br />
|34<br />
|-<br />
|David Ellis Jones B.Sc, ALCM. GW8PBX (SK)<br />
|35<br />
|-<br />
|Locking the Octagon PLL LNB to an external reference<br />
|36<br />
|-<br />
|Turning Back the Pages - CQ-TV 73<br />
|37<br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8833UK ATV DX Records2021-09-30T08:18:22Z<p>G4FRE: /* 47GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
World record = 464km JA0DAE > JA0RUZ<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
World record = 463km JA0DAE > JA0RUZ<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|-<br />
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 125ks/s||<br />
|-<br />
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||<br />
|}<br />
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8829UK ATV DX Records2021-09-28T20:27:06Z<p>G4FRE: /* 47GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
World record = 464km JA0DAE > JA0RUZ<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
World record = 463km JA0DAE > JA0RUZ<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|-<br />
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU71 - Birdlip Hill|| DATV 333ks/s||<br />
|-<br />
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||<br />
|}<br />
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8828UK ATV DX Records2021-09-28T20:26:23Z<p>G4FRE: /* 47GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
World record = 464km JA0DAE > JA0RUZ<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
World record = 463km JA0DAE > JA0RUZ<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|-<br />
| 26-09-2021 || 67 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81WU - Birdlip Hill|| DATV 333ks/s||<br />
|-<br />
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS19 - Blorenge|| G8GTZ/P || IO81XW81 - Cleeve Common|| DATV 125ks/s||<br />
|}<br />
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8827UK ATV DX Records2021-09-28T13:13:36Z<p>G4FRE: /* 47GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
World record = 464km JA0DAE > JA0RUZ<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
World record = 463km JA0DAE > JA0RUZ<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|-<br />
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS - Blorenge|| G8GTZ/P || IO81XW - Cleeve Common|| DATV 125ks/s||<br />
|}<br />
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8826UK ATV DX Records2021-09-28T13:13:06Z<p>G4FRE: /* 47GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
World record = 464km JA0DAE > JA0RUZ<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
World record = 463km JA0DAE > JA0RUZ<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|-<br />
| 26-09-2021 || 74 km|| GW4FRE/P ||IO81LS - Bloringe|| G8GTZ/P || IO81XW - Cleeve Common|| DATV 125ks/s||<br />
|}<br />
World record = 115km JA0RGP in PM97MT > JA0RUZ in PM96FV<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8783UK ATV DX Records2021-08-28T11:04:21Z<p>G4FRE: </p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8782UK ATV DX Records2021-08-28T10:59:22Z<p>G4FRE: /* 122GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8781UK ATV DX Records2021-08-28T10:57:53Z<p>G4FRE: /* 122GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8780UK ATV DX Records2021-08-28T10:56:42Z<p>G4FRE: /* 134GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: https://w6ze.org/DATV/Known-DATV-DX-Records_2021.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser https://www.hb9afo.ch/records/default.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
|24/9/2013 || 528 Kms|| G3PYB/P || ||F6AQO || <br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==122GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Jetson_Nano&diff=8755Jetson Nano2021-08-20T15:46:21Z<p>G4FRE: </p>
<hr />
<div>This page is a starting point for resources for using the Jetson Nano (with or without a Portsdown) to drive a LimeSDR to transmit DATV.<br />
<br />
John G7JTT has written up his experiences on the BATC forum: https://forum.batc.org.uk/viewtopic.php?t=6402&p=21487#p21487<br />
<br />
The control of the Jetson Nano from the Portsdown is an "Unsupported Feature". This means that we will make best efforts to keep it working, but it is still somewhat experimental.<br />
<br />
===G8GKQ's Installation Procedure===<br />
<br />
To start with, you need a Jetson Nano, a 32 GB SD Card (Sandisk Ultra 10 recommended), a 4A 5V PSU with a 2.1mm power plug, a 0.1 inch jumper, an HDMI monitor, a USB Mouse and a USB keyboard.<br />
<br />
Download the Jetson Nano disk image to a PC and unzip it. Use Win32 Disk Imager or Etcher to write it to your SD Card. These instructions are based on the jetson-nano-sd-r32.1-2019-03-18 image and will not work with later images. An updated set of instructions is being prepared.<br />
<br />
Fit the jumper link to the Nano PCB at J48 to select the use of the 2.1mm power socket, insert the SD Card, connect the monitor, keyboard and mouse. Connect the Nano to your home network and then connect the power and turn it on. Go through the NVIDIA start up routine so that you have a working Nano connected to your network. I used the username "nano" and the password "jetson". These are weak and obvious and should only be used on private networks, but make scripting easy.<br />
<br />
Note that the process may seem to freeze on "waiting for unattended-upgr to exit" for around 30 minutes, this is expected, the system is automatically updating software in the background.<br />
<br />
Right-click on the desktop and open a terminal window. Run the following commands. You will need to enter the password occasionally.<br />
<br />
sudo apt-get update<br />
sudo apt-get -y dist-upgrade<br />
sudo apt-get -y install git htop nano vlc v4l-utils<br />
<br />
You are now ready to install the DATV software.<br />
<br />
===Installing DATV Software===<br />
<br />
Download and install the software from F5OEO's repository:<br />
<br />
git clone https://github.com/F5OEO/dvbsdr<br />
cd dvbsdr<br />
./install.sh<br />
<br />
===Preparing the LKV373A HDMI Device===<br />
<br />
The LKV373A should be a transmitter (Sender) and of hardware version 3.0 as shown here:<br />
<br />
[[File:LKV373A Topside.jpg|246px]] [[File:LKV373A Underside.jpg|200px]]<br />
<br />
This is probably the most difficult part of the software installation. More details to follow in CQ-TV, but I upgraded the firmware (not encoder) to 20160427 using the instructions here: https://www.yodeck.com/docs/display/YO/Creating+a+Video-Wall+with+Yodeck#CreatingaVideo-WallwithYodeck-J.ConfiguringtheLKV373ASenderunit . These are at the end of the very long web page. The firmware is here [[:File:IPTV_TX_PKG_v4_0_0_0_20160427.zip]]<br />
<br />
Dave also set the unit to factory defaults, but did not change any other settings. The PuTTy settings to carry out the factory reset per Yodeck.com instructions with your own device IP address look like the following:-<br />
<br />
[[File:PuTTy_for_HDMI_sender_reset.PNG|300px]] [[File:IPTV_server_web_page_at_completion.PNG|300px]]<br />
<br />
After the firmware upgrade, the username and password for the LKV373A is admin/123456. Then the IP address webpage of the device will look like the top right image. <br />
<br />
If you have issues with the firmware upgrade, recovery might be possible using the IPV Tools application found here: https://drive.google.com/drive/u/0/folders/0B3mWuDyxrXyKSTZZZlRESlpBZmM.<br />
<br />
At various times during the LKV373A set-up, it had the following IP addresses: 192.168.1.238, 10.1.0.99, 10.1.2.99, and 169.254.113.227.<br />
<br />
The address for the stream is almost always udp://@239.255.42.42:5004 (you can paste this into VLC on a PC and watch the stream). Note that you cannot view the stream using VLC on the Jetson Nano - for some reason it does not work.<br />
<br />
For more information about the LKV373A [https://www.youtube.com/watch?v=SAvGylthpkU try this video from OpenTechLabs on YouTube].<br />
<br />
===Modifying the Scripts===<br />
<br />
To transmit using the Nano and this script, you will need to plug a LimeSDR Mini into it. '''If you are NOT controlling it from the Portsdown, you will also need to modify the script ~/dvbsdr/scripts/jetson_nano.sh.''' Note that if you are using Portsdown control, you can skip this step. <br />
<br />
The only input devices that work with this script are the LKV373A, and the Pi Cam when connected to the Jetson board. The PiCam will not work without a USB microphone dongle connected to the Jetson board - without this it never transmits a picture.<br />
<br />
The C920, although referenced in some of the code, does not work with this script.<br />
<br />
The working script is here:<br />
<br />
#!/bin/bash<br />
<br />
# *********************************************************************<br />
# ************** ENCODE AND MODULATE FOR JETSON NANO ******************<br />
# ************** (c)F5OEO April 2019 ******************<br />
# *********************************************************************<br />
<br />
CALL=G8GKQ<br />
# ------- MODULATION PARAMETERS --------<br />
# 1/4,1/3,2/5,1/2,3/5,2/3,3/4,4/5,5/6,8/9,9/10 for DVB-S2 QPSK.<br />
# 3/5,2/3,3/4,5/6,8/9,9/10 for DVB-S2 8PSK<br />
source ./include/modulateparam.sh<br />
FREQ=2409.25<br />
SYMBOLRATE=500<br />
FECNUM=1<br />
FECDEN=2<br />
#DVBS,DVBS2<br />
MODE=DVBS2<br />
#QPSK,8PSK,16APSK,32APSK<br />
CONSTELLATION=QPSK<br />
GAIN=0.8<br />
# $LONG_FRAME,$SHORT_FRAME<br />
TYPE_FRAME=$LONG_FRAME<br />
# $WITH_PILOTS,WITHOUT_PILOTS<br />
PILOTS=$WITHOUT_PILOTS<br />
# Upsample 1,2 or 4 : 4 delivers the best quality but should not be up to 500KS<br />
UPSAMPLE=2<br />
<br />
# ------- ENCODER PARAMETERS --------<br />
<br />
VIDEO_RESX=1280<br />
# 16:9 or 4:3<br />
RATIO=16:9<br />
case "$RATIO" in<br />
"16:9")<br />
let VIDEO_RESY=VIDEO_RESX*9/16 ;;<br />
"4:3")<br />
let VIDEO_RESY=VIDEO_RESX*3/4 ;;<br />
esac<br />
<br />
#Uncomment if don't want to use ratio calculation<br />
#VIDEO_RESY=1080<br />
<br />
#Only 25 is working well with audio<br />
VIDEO_FPS=25<br />
#Gop Size 1..400 (in frame) <br />
VIDEO_GOP=100<br />
PCR_PTS=200000<br />
#VIDEO INPUT<br />
<br />
#Could be VIDEOSOURCE_PICAMERA, VIDEOSOURCE_USB_CAM , VIDEOSOURCE_IP<br />
VIDEOSOURCE=VIDEOSOURCE_IP<br />
#VIDEOSOURCE=VIDEOSOURCE_PICAMERA<br />
VIDEOSOURCE_IP_ADRESS=239.255.42.42<br />
VIDEOSOURCE_IP_PORT=5004<br />
<br />
# H264 or H265<br />
CODEC=H265<br />
<br />
#AUDIO INPUT<br />
<br />
# NO_AUDIO,USB_AUDIO,FILE_WAV,BEEP<br />
AUDIOSOURCE=USB_AUDIO<br />
AUDIO_BITRATE=20000<br />
<br />
# Bitrate<br />
source ./include/getbitrate.sh<br />
let TS_AUDIO_BITRATE=AUDIO_BITRATE*14/10<br />
let VIDEOBITRATE=(BITRATE_TS-12000-TS_AUDIO_BITRATE)*650/1000<br />
let VIDEOPEAKBITRATE=VIDEOBITRATE*110/100<br />
#OUTPUT TYPE LIME or IP<br />
OUTPUT=LIME<br />
OUTPUT_NETWORK="230.0.0.10:10000"<br />
# Launch processes<br />
echo <br />
echo VideoBitrate = $VIDEOBITRATE<br />
echo VideoPeakBitrate = $VIDEOPEAKBITRATE<br />
<br />
case "$OUTPUT" in<br />
"LIME")<br />
source ./include/nanoencode.sh | source ./include/limerf.sh<br />
;;<br />
"IP")<br />
source ./include/nanoencode.sh<br />
;;<br />
esac<br />
<br />
<br />
Most of this is self-explanatory. Note that "short frames" do not work.<br />
<br />
===Transmitting using the Script===<br />
<br />
cd ~/dvbsdr/scripts<br />
./jetson_nano.sh<br />
<br />
To stop transmitting, simply press ctrl-c.<br />
<br />
===Update - Control from Portsdown Touchscreen===<br />
<br />
Version 201906060 of the Portsdown Software (currently only available as a Development Release) introduces experimental control of a Jetson Nano set up as above from the Portsdown touchscreen.<br />
<br />
To set this up, load the development release, and then go to Menu 3, Jetson Config.<br />
On the Jetson Configuration Menu, you need to set up:<br />
* The Jetson username<br />
* The Jetson password<br />
* The Jetson root password<br />
* The Jetson IP Address<br />
* The LKV373A UDP broadcast address<br />
* The LKV373A UDP port<br />
<br />
If you have used the setup instructions above, you should only need to change the Jetson IP Address.<br />
<br />
Once the IP Address is correct, the Shutdown and Reboot buttons should turn from Grey to Green indicating that the Raspberry Pi can ping the Jetson.<br />
<br />
After you have done this, use the touchscreen to select:<br />
* Output to: Jetson Lime<br />
* Encoder: H264 or H265<br />
* Source: HDMI, Pi Cam or C920 (note that the Pi Cam OR the C920 should be connected to the Jetson, not the RPi)<br />
<br />
'''Note that only one of the C920 or Pi Cam should be connected at any time. Connecting both at once disables both.'''<br />
<br />
Then you can select other settings (Modulation, Frequency, Symbol Rate, FEC and Lime Gain) as required. Testing has only been conducted over a narrow range of SRs and FECs. 500KS, FEC 1/2 is a good starting point.<br />
<br />
When you shut down your Portsdown using the touchscreen ShutDown button, it will send a ShutDown signal to the Jetson as well, allowing a graceful shutdown of the Jetson without the use of a screen and keyboard.<br />
<br />
The GPIO pin 40 on the Jetson can be used to key PAs as it is programmed to go high 15 seconds after TX selection and go low at the end of the transmission. However, please see the warning about GPIO behaviour below.<br />
<br />
===Portsdown Control Problems===<br />
<br />
If you have trouble controlling the Nano from the Portsdown, try a manual ssh session from the Pi to the Jetson. You may find that you have to update the trust certificate. Thanks to G0MJW for suggesting this one!<br />
<br />
== Hardware ==<br />
<br />
=== Power Draw ===<br />
<br />
Measured at a supply of 5.1V into the DC barrel jack connector. >5V measured on the GPIO header.<br />
<br />
* CPU Frequencies at deafult: 0.3 - 0.6A depending on CPU & Network load<br />
* CPU Frequencies at max: 0.45 - 0.9A depending on CPU & Network load<br />
* CPU at max, LimeSDR Mini & C920 at 1MS 1080p H.265 DVB-S2 transmit: 1.8 - 1.9A<br />
<br />
=== GPIO ===<br />
<br />
The GPIO pinout of the Jetson Nano can be found here: https://www.jetsonhacks.com/nvidia-jetson-nano-j41-header-pinout/<br />
<br />
Note that when not initialised in sysfs (ie. straight after power-on), the GPIO pins appear to be able to be latched up from their default 0V state to a 3.3V high, or an unstable ~1.4V state by simply touching a scope or multimeter probe to the pin. The exact characteristic of this behaviour isn't yet understood but it is worrying for PA PTT control and similar applications.<br />
<br />
=== Fan ===<br />
<br />
PWM fans are available however the use of a non-PWM 5V fan will cause the fan to simply run all the time (including when the Jetson is shutdown), removing the requirement for the fan to be manually started in software after boot. When using PWM, set a value where the fan runs slowly but reliably to minimise noise. There is some code here https://github.com/Pyrestone/jetson-fan-ctl or here https://github.com/hooperbill/fan-daemon for automatic fan speed control. Manually:<br />
<br />
sudo sh -c 'echo XXX > /sys/devices/pwm-fan/target_pwm' where XXX is a number between 0 and 255 setting the PWM speed.<br />
<br />
The holes in the heatsink can be tapped for M3 bolts, or can be drilled out. Note that the fins below the holes prevent more than ~3mm of the bolt from protruding below.</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Custom_DATV_Firmware_for_the_Pluto&diff=8693Custom DATV Firmware for the Pluto2021-07-25T14:36:02Z<p>G4FRE: /* PTT output */</p>
<hr />
<div>===Foreword===<br />
<br />
This is a preview of an article due for publication in CQ-TV 266, published here to promote early experimentation. Thanks to Paul M0EYT for writing it.<br />
<br />
Before loading the custom firmware, it may be necessary to extend the frequency range of the Pluto. The instructions for this can be found on this web page: https://wiki.analog.com/university/tools/pluto/users/customizing. Scroll down to the bottom section "Updating to the AD9364".<br />
<br />
You may also wish to enable the second CPU core as described here: https://www.ph4x.com/pluto-sdr-hack-2nd-cpu-core/<br />
<br />
You can download the firmware at http://firmware.hackhamradio.com. '''This site no longer works.''' '''Updated information about how to get the firmware is here: https://wiki.batc.org.uk/Portsdown_4_Pluto'''<br />
<br />
===Introduction===<br />
<br />
Firstly, I'm not a DATV expert but have played with a number of SDR's over the years since my first SDR-14 back in 2005. I dabble in GHz stuff so have a rough idea what I'm doing but that’s about it! I like to make sure I learn something new related to technology every day, so both DATV and the PLUTO SDR fulfil this. I got the PLUTO after borrowing one from Jules, G0NZO and being super impressed by it, for the price you really cannot go wrong. It works out of the box, has TX+RX and with a few minutes work, can have its frequency range extended to cover 70MHz to 6GHz, not bad at all, plus it runs Linux internally (Linux pluto 4.14.0-g387d584d434e). The receiver is great and I used the loan unit to listen to all Bell Hill beacons up to 5.7GHz with something akin to a paperclip pushed into the RX port.<br />
<br />
[[File:Pluto.png|105px]]<br />
<br />
This is the unit in question, shown to the left, it’s very compact at 5"X3"X1" with separate transmit and receive SMA sockets and a pair of micro USB sockets for I/O and power. It draws 400-420mA when idle or transmitting. When the QO100 narrow band transponder was used with PLUTO SDR's for TX, some frequency drift was apparent. It turns out that the integral TCXO wasn’t particularly good, so it's worth replacing it with a decent TCXO such as the ASTX-13-C-40.000MHz-I05-T which you can get from Mouser. This solves all frequency stability issues (well most...). For the ultimate stability, external GPSDO reference is still recommended.<br />
<br />
===First Steps===<br />
<br />
I've built the Portsdown filter/modulator unit for DVBS which performs really well, but was looking for a non-Lime-SDR method (it’s a long story) of generating DVBS28PSK and 16/32APSK DATV. I saw on Twitter that OM Evariste, F5OEO (@F5OEOEvariste) of RPiTX fame was developing replacement firmware for the PLUTO that would provide DATV capabilities as well as some other goodies, so I pinged him a message and asked if I could beta-test the firmware. The firmware arrived quickly.The 'pluto.frm' file is copied into the root directory of the PLUTO mass storage memory, where the configuration files exist. Once copied up, 'eject' the device, don’t unplug the USB but use the software eject. The blue LED1 in the PLUTO will rapidly flash for 3 or 4 minutes then reboot and the mass storage device will reappear. Full details on this process are at https://wiki.analog.com/university/tools/pluto/users/firmware - don't unplug it during the flash process for obvious reasons; you might brick it. With the SDR still plugged into your PC, you can browse to the internal web-server by pointing a browser at http://192.168.2.1 with all being well you should see something similar to the next screenshot:<br />
<br />
[[File:Screenshot.png|450px]]<br />
<br />
Having updated the firmware and confirmed that it was working, next was the start of a massive learning curve…What would I need to use to generate some 'digital stream' with video in it? What software should be used? How does the stream get from the PC to the SDR? How do you set all the parameters needed to generate DATV? How do I get video from my phone camera into the PC? The list of questions was growing the more I looked into this stuff....<br />
<br />
===Firmware update over LAN===<br />
<br />
BTW you may be wondering how you update the Plutos firmware if you are running it via a LAN connection, well, its pretty simple. Download WinSCP, configure it to point at the IP Address of your Pluto, copy the pluto.frm file up to /root (root home directory). Once done, SSH into the Pluto (download Putty or similar) then execute update_frm.sh pluto.frm this will extract the firmware and update the internal flash memory. Once done, type 'reboot'. When the Pluto comes back up, it'll be at the firmware level just uploaded; this saves having to plug the Pluto into a PC via USB and using the normal firmware update method.<br />
<br />
===Digital Video Source===<br />
<br />
I know John, GI7UGV, as we work in the same industry and know that he's really into DATV, so had a chat with him and within minutes had VMIX (https://www.vmix.com/) installed – this looked like the easiest initial method of doing what I needed; make a PC generate some stream to control the PLUTO. This was pretty intuitive and within half an hour I had a test card source, spitting out the relevant data to the PLUTO. This was done by setting an external RTMP stream target with the following parameters:<br />
<br />
URL : rtmp://192.168.2.1:7272/,437,DVBS2,QPSK,333,23,Pass : ,M0EYT,<br />
<br />
The above parameters form part of the URL and are parsed by the F5OEO firmware to set the various DATV transmission parameters:<br />
<br />
Frequency in MHz: 437<br />
Mode (DVBS/DVBS2): DVBS2<br />
Constellation (QPSK,8PSK,16APSK): QPSK (only QPSK is valid in DVBS)<br />
SymbolRate in KS (33-2000): 333<br />
FEC (12,23,34,67,78...): 23<br />
CALLSIGN: M0EYT<br />
<br />
It's particularly important to look at the RTMP stream definition syntax, probably best to cut & paste the above URL / pass text and then modify to suite your own requirements. With the PLUTO SDR plugged into the USB port of the PC running VMIX, it worked right away and a QPSK carrier was being generated at 437MHz, receivable on the Minitiouner. I had noted that VMIX was not free, so rather than spending hours with IDA, and having noted what John 'UGV had said, I decided to uninstall VMIX and give OBS (Open Broadcaster Software https://obsproject.com/download) a try. Since this is open source, there are no licensing 'difficulties' and although it's not as polished as VMIX, it's fully functional and just works.<br />
<br />
===OBS Basics===<br />
<br />
In OBS the first thing to do is to define the output stream so it points at the PLUTO SDR, so go to settings, stream, and type in the following; obviously tweaking the IP address, modulation parameters and callsign to suit your own environment:<br />
<br />
[[File:OBS.png|606px]]<br />
<br />
You will be able to see a 'Controls' box docked at the bottom of the OBS window, this is where you press 'start streaming' to enable the PLUTO's DATV output. A green block should appear in the status bar indicating that streaming to the PLUTO is occurring.<br />
<br />
Before you jump in and press 'start streaming', you will need to set the streaming bitrate to avoid any overflows between OBS and the PLUTO. Visit http://www.satbroadcasts.com/DVB-S_Bitrate_and_Bandwidth_Calculator.html type in your DVBS/S2 parameters, press calculate, and make a note of the 'Netto TS bitrate' – you want to set your streaming bit rate to about 65% to 70% of this figure. So if the Net TS bitrate is 440Kbps you will want to set your video bitrate to say 286Kbps, better to set it on the lower side. This means that the video plus transport overheads will not cause overflows when streaming data into the PLUTO. Once you are familiar with the various bitrates, and your favourite settings, you will be able to guesstimate the video bitrate in OBS. It is set via 'settings', then 'output', then under the 'streaming' section type your bitrate. I have my encoder set to x264 compression and my audio bitrate set to 64Kbps. With these settings, there are no interruptions in the audio stream and everything works fluidly.<br />
<br />
Next, you will need a picture source, so the easiest method in OBS is to go to the 'scenes' dock, press +, enter a name for your scene, such as 'test card'. Next in the 'sources' dock, press +, select video capture device, create new, type in some name and press OK. You should see a 'colour bar / grey fade / bar' test card appear in the 'Preview' window. Ensure that in the 'Controls' dock, you have pressed 'Studio Mode' so you see Preview and Program windows.<br />
Whatever you see in the 'Program' window is the video that is being streamed to your PLUTO.<br />
<br />
You can set a number of 'scenes' so that you can quickly select and fade or cut between them. If you have desktop video files these are easy to add. You can create an additional scene and for example put a JPG/PNG image there, or add some desktop video. I found that my camcorder dumped its video out in a .VRO file, never heard of that, but OBS could ingest it and stream it correctly including the stereo audio tracks.<br />
<br />
You can also easily add scrolling text messages to overlay across your images, various analogue and digital clocks, inputs from webcams, RTSP CCTV cameras, dancing chicken / cat overlays etc., there are a lots of choices. You probably want to spend a few hours clicking through the various menus to get a handle on the software options and what it can do. I found it fairly easy to set up sources and to be able to chop and change parameters whilst watching the DVB-S2 stream on another laptop. Within OBS it's also worth looking at the various extensions / add-ons that others have written for the platform, these basically are additional features for you to use. You will end up with something similar to my instance:<br />
<br />
[[File:OBS Screen.png|585px]]<br />
<br />
In my OBS 'scenes' I have an 'rtmp streamer' input, this allows me to use the camera / microphone in my Android mobile phone, along with software called Larix Broadcaster https://play.google.com/store/apps/details?id=com.wmspanel.larix_broadcaster - what this does is streams the video from the phone, but you cannot ingest this directly into OBS since you need an RTMP streaming server. <br />
<br />
You could use this mobile app to directly stream to the PLUTO SDR but then all the nice video processing features of OBS are lost. Luckily there is a thread at https://forum.batc.org.uk/viewtopic.php?f=69&t=6179 detailing what needs to be done to make build such a server, you can drop this onto one of your Raspberry PI's and it consumes very little CPU. Basically it uses NGINX HTTP server with an RTMP streamer plugin and just works. Point your phone and OBS at the PI's IP with the port defined in the configuration file, press the various go buttons and video / audio will be streamed from the phone into OBS.<br />
If you can get away from having any analogue video sources in your setup, your overall stream output will be digital from the sensor through to the display at the other end of your QSO. This means that quality will be maintained and you won't have poor quality audio with earth loops / buzzing or video that suffers from typical analogue artifacts.<br />
<br />
If you want to stream from a Windows desktop into the RTMP server, that is also easy to set up. Firstly download FFMpeg from https://ffmpeg.zeranoe.com/builds/ - you will then need the capture drive which you can get from http://www.umediaserver.net/components/index.html search for UScreenCapture and download the appropriate version. Once both packages are installed, open a command shell and execute the following;<br />
<br />
ffmpeg -f dshow -i video="UScreenCapture" -r 10 -c:v libx264 -b:v 300k -preset ultrafast -b 300k -s 1280x800 -x264opts keyint=50 -g 25 -pix_fmt yuv420p -f flv "rtmp://1.2.3.4:1936/live1/desktop"<br />
<br />
the -b:v and -b parameters are video bitrate. -s is capture size and -r is 10 frames per second, adjust to suite your particular setup. I tested this with 333Ksps QPSK and it renders nicely. In OBS you should set up a steam source pointing to rtmp://1.2.3.4:1936/live1/desktop to be able to see your desktop image.<br />
<br />
Obviously set the target RTMP server IP address to the appropriate address. If you are using John GI7UGV's nginx RTMP server, you can add another directive to support multiple streams. Your /etc/nginx/nginx.conf might look as follows;<br />
<br />
worker_processes auto;<br />
rtmp_auto_push on;<br />
events {}<br />
rtmp {<br />
server {<br />
listen 1935;<br />
application live {<br />
live on;<br />
record off;<br />
}<br />
listen 1936;<br />
application live1 {<br />
live on;<br />
record off;<br />
}<br />
}<br />
}<br />
<br />
===System Integration===<br />
<br />
Having thought briefly about how to integrate the PLUTO into my existing QO100 narrow band system, I decided that it would be better to place all of the needed equipment into the ODU since there are already mains, 10MHz ref, LAN, 70cms IF, etc. connections to the outdoor box. <br />
<br />
[[File:Pluto Network.png|313px]]<br />
<br />
I found an old USB<>Ethernet adapter and an OTG adapter, plugged it into the PLUTO's USB IO port, and a phone charger battery into the PSU USB port, the PLUTO defaults to DHCP so quickly obtains an IP address once its internal Linux OS has booted.<br />
<br />
Network operation really is the way to go as it eliminates lots of USB issues and allows multiple sources to use the SDR without having to continually mess around with USB cables and fragile micro-USB connectors.<br />
<br />
Matthias DD1US has written up his PLUTO LAN experiences at http://www.dd1us.de/Downloads/Connecting%20the%20ADALM%20Pluto%20to%20the%20Local%20Area%20Network%20v2.pdf which is worth digesting.<br />
<br />
In the final system iteration here at the M0EYT ground station, I'll use a good de-noised 5V PSU, the PLUTO will go in a metal box for mechanical stability purposes, and I'll mount SMA sockets with back to back connectors that have the same hole spacing as the SDR, this should ensure that nothing gets broken.<br />
<br />
===PTT output===<br />
<br />
The PLUTO Firmware now supports a PTT output so that when a valid RTMP stream starts, the PTT pin changes state to allow amplifiers etc to be keyed. PTT comes from GPO0 circled in red below;<br />
<br />
[[File:20191023_124122.jpg|400px]]<br />
<br />
The logic-level output is 0/1.2V which is just enough to drive an optocoupler or transistor, a optocoupler provides isolation between the PLUTO and whatever it is you are controlling. A transistor can drive a relay. <br />
<br />
<br />
M0EYT used a '356' opto-coupler recovered off an old PCB. Note: During the PLUTO boot process the GPO0 pin toggled from low to high, stays there for 5 seconds, then toggles back to low. No RF output was seen during this toggle etc.<br />
<br />
F5OEO used two transistors to gate the GPIO0 and GPIO1 signals such that there is no false triggering on start up thanks to idead of Sigi dg9bfc<br />
<br />
[[File:Sequence.jpg|400px]]<br />
<br />
<br />
G0MJW used F5OEO's suggestion and produced a PCB which connects to the GPIO header. Here is the circuit and what it looks like. There are two variants, one designed to fit on the GPIO header, the other a more traditional mounting:<br />
<br />
[[File:Relay1.jpg|400px]]<br />
[[File:RealRelay.jpg|400px]]<br />
[[File:Relay2.JPG|400px]]<br />
[[File:Image.JPG|400px]]<br />
<br />
The 5V supply can be taken from a suitable point in the Pluto power supply. Look at the schematic on the Analog web site for more information. C157 seems to work. <br />
<br />
[[File:Plutomod.jpg|400px]]<br />
<br />
Don't short this out or you will send your Pluto back to the underworld where it will have to judge it's own demise. https://en.wikipedia.org/wiki/Pluto_(mythology)<br />
<br />
The relay contacts can be used to control a power amplifier. This control is your problem, but remember the small PCB relay can only switch 500mA and the optocoupler considerably less.<br />
<br />
PCBs are available for sale in the BATC member's shop: https://batc.org.uk/category/projecthw/<br />
<br />
Note that with the originally specified relay becoming scarce, the Celduc D71A2100 relay, available as RS Stock No.178-2573 will also work on the low profile PCB, but will require the diode to be fitted on the PCB><br />
<br />
===RF Topics===<br />
<br />
The RF output level of the PLUTO is pretty low, about -15dBm at 2.4GHz so clearly this needs some amplification to do anything useful with.I decided to look at some of the random amplifier modules I had laying around and see what each did to the output spectrum, in particular the spectral regrowth / shoulders.<br />
All measurements below are taken with the PLUTO generating DVBS2 at 2409.750MHz centre, 8PSK, 333Ksps, 2/3 FEC.<br />
<br />
[[File:6 Avantek.png|400px]]<br />
Avantek SA82-2340<br />
<br />
[[File:7 SPF.png|400px]]<br />
SPF5043 + 10dB Pad on o/p<br />
<br />
[[File:8 LNA4.png|400px]]<br />
LNA4ALL + 10dB Pad on o/p<br />
<br />
[[File:9 3x.png|400px]]<br />
3 X amp 30~dB gain (+ 10dB Pad on o/p)<br />
<br />
[[File:11 Pluto Direct.png|400px]]<br />
PLUTO direct output 8PSK baseline<br />
<br />
[[File:10 Pluto 8.png|400px]]<br />
PLUTO 8PSK baseline<br />
<br />
From the tests of LNA's to get the PLUTO output up a bit, it appears the more modern devices do not add significant IMD to the xPSK providing they are not over driven.<br />
My current experimental TX line up is a dual FET pre-amp taking the PLUTO output to +5dBm, a secondary PA rated at 20watts running at 30dBm, and then a Spectrian PA, modified as per the CQ-TV article to deliver 45dBm, about 30 watts. Looking at the PSK constellation shows that its relatively clean, and the shoulders either side of the 8PSK are 35dB down which should just about be acceptable. I will try to find one of the Axis-NT amplifiers as that would solve all power problems.<br />
<br />
===Wrapping Up===<br />
<br />
The PLUTO SDR with the F5OEO firmware certainly does offer a simple way to generate DATV from VHF up to the lower microwave bands. For QO100 with a suitable amplifier chain it is ideal and should result in many more users appearing on the wideband transponder. There are no annoying pre-transmission calibration carriers to spatter over the transponder which is nice. A great amount of credit should be given to Evariste F5OEO for his amazing work on this firmware, and I would recommend you donate to his efforts via https://www.paypal.me/f5oeo - something for a decant bottle of wine or two for example! I'm sure that many hundreds of man-hours have been put in to this project so a bit of support won't go a-miss and might even encourage further enhancements.See you on the transponder! Thanks to John GI7UGV for sanity checking this write up ;-)</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_4_Langstone_Integration&diff=8666Portsdown 4 Langstone Integration2021-07-18T08:37:42Z<p>G4FRE: /* Background */</p>
<hr />
<div>===Background===<br />
<br />
The Portsdown 4 is designed to work alongsde the [https://wiki.microwavers.org.uk/Langstone_Project Langstone Microwave Transceiver], using common hardware. However, the 2 projects are separate with differing priorities.<br />
<br />
Before trying to install the Langstone on your Portsdown hardware, check that you have:<br />
* A Pluto SDR (with the extended frequency range modification) connected by USB (at least initially)<br />
* The correct USB audio dongle. Non-supported USB dongles will not work.<br />
* A USB mouse for use as a scrollwheel<br />
<br />
===Initial Installation===<br />
<br />
Your Portsdown must be connected to the internet (preferably with a wired connection) to install or update the Langstone Software.<br />
<br />
It is recommended that you initiate a Portsdown Update ("Menu 3", "Check for Update" then "Update" or "Force Update") to update to the latest system files before installing Langstone.<br />
<br />
Once updated, from Menu 3, select "Langstone Config", "Install Langstone Now". An "Installing Langstone Sofwtare" screen will be displayed while the extra sofwtare packages required by the Langstone are installed, and then the Langstone software itself is installed. '''Be patient, this will take 5 to 10 minutes''' (depending on the speed of your internet connection). At the end of the process, the Portsdown will reboot to Portsdown.<br />
<br />
Once rebooted, you can select Langstone from "Menu 2", "Switch to Langstone". Sometimes the first attempt to start the Langstone will fail; if this happens, shut the system down, restart it and try again. For further troubleshhooting, please refer to this page https://wiki.microwavers.org.uk/Langstone_Project#Diagnostics .<br />
<br />
===Usage===<br />
<br />
The Langstone can be selected from "Menu 2", "Switch to Langstone". Portsdown will command the Pluto to reboot so that it is ready to work with Langstone and then, once it has detected that the Pluto has rebooted (usually after 22 seconds) it will start the Langstone application.<br />
<br />
If you want to switch back to Portsdown, Select "Set" and "Exit to Portsdown". Again, the Pluto will be rebooted and Portsdown will start when this is complete. Alternatively you can shut the Raspberry Pi down directly by selecting "Set" and "Shutdown". On next start-up, by default, the Raspberry Pi will boot to the Portsdown.<br />
<br />
===Boot to Langstone===<br />
<br />
You can set the Portsdown to always boot to the Langstone rather than the Portsdown from "Menu 3", "System Config", "Start-up App".<br />
<br />
===Managing Pluto IP Addresses===<br />
<br />
By default the Portsdown looks for the Pluto on the IP address 192.168.2.1. By default the Langstone uses the name "pluto.local", rather than an IP address.<br />
<br />
From the Langstone Configuration Menu ("Menu 3", "Langstone Config"), you can change either or both of these settings. They do not need to be the same. The Portsdown setting will only accept valid IP addresses, but the Langstone setting will also accept "pluto.local".<br />
<br />
The "Pluto IP for Langstone" will need to be reset after a Langstone Update.<br />
<br />
===Updating the Langstone Software===<br />
<br />
You can update the Langstone software from the Langstone Configuration Menu ("Menu 3", "Langstone Config", "Update Langstone"). This action simply downloads a new version of the Langstone software, retaining your old "Langstone.conf" file which holds the Langstone settings.<br />
<br />
If the format of the Langstone.conf file is updated, you will need to manually change or replace the file from the command line.<br />
<br />
The Langstone update functionality does not update the packages on the system, so if a Langstone update requires the latest version of any packages, these would need to be updated by performing a normal Portsdown update (perhaps even a "Forced Update").</div>G4FREhttps://wiki.batc.org.uk/index.php?title=The_Portsdown_DATV_transceiver_system&diff=8513The Portsdown DATV transceiver system2021-06-28T20:16:52Z<p>G4FRE: /* Portsdown 4 */</p>
<hr />
<div><br />
<br />
<br />
==Introduction==<br />
<br />
The aim of the Portsdown project is to enable an amateur radio operator with little or no knowledge of Digital ATV to construct the hardware elements, load and configure the software and use the system to send live Digital ATV signals across town on his existing aerials. <br />
<br />
'''New builders are recommended to build a Portsdown 4 which, when used with a Adalm Pluto, is integrated with the Langstone Microwave transceiver software enabling an advanced multimode narrow band and DATV transceiver covering 70Mhz to 6GHz for under £350.<br />
'''<br />
<br />
The Portsdown DATV transmitter project provides an easy way to “get on air” with Digital ATV at a relatively low cost covering all of the commonly used DATV modes enabling it to be used for cross town QSOs, accessing ATV repeaters and for working the DX using Reduced bandwidth (RB-TV) modes.<br />
<br />
==Outline specification==<br />
<br />
Outline specification of the Portsdown 4 system is as follows:<br />
<br />
• Frequency coverage depends on the SDR used but covers 50, 71, 146 MHz, 437 MHz, 23cms, 13cms, 3.4GHz and 5.6 ATV bands when using Pluto SDR.<br />
<br />
• MPEG-2 and MPEG-4 (H264) video encoding<br />
<br />
• Cost-effective stand-alone (not PC based) Digital TV Transmit and receive solution<br />
<br />
• Wide range of Symbol rates from 125 Ks to 4Ms* including Reduced Bandwidth (RB-TV) modes and “normal” DATV modes<br />
<br />
• Analogue video input to allow use of camcorders and mixing desks<br />
<br />
• Use of commonly available components and modules<br />
<br />
• Modular construction enabling a step-by-step system build and easy trouble shooting<br />
<br />
• Designed to encourage home construction and requiring an average skill level<br />
<br />
• Fully documented and supported including easy software installation and upgrades<br />
<br />
==System overview==<br />
<br />
At the heart of the The Portsdown Transmitter is a Raspberry Pi (RPi) computer running a BATC customised version of the F5OEO rpidatv software. <br />
<br />
The choice of the RPi is primarily due to the fact that it has an on-board MPEG-4 (H264) encoder and the versatile hardware interface (GPIO) capabilities. <br />
<br />
A touch screen interface enables the system to be used as a standalone unit without further need to connect up keyboard and mouse. If the LCD is not available, the system can be controlled by using an external PC connected over a wired or wi-fi network (console mode). <br />
<br />
[[File:Portsdown 4 Block.PNG|700px]]<br />
<br />
<br />
====Touch screen control====<br />
<br />
[[File:Menu1.jpg|480px]]<br />
<br />
====RF Generator and DATV Modulator====<br />
<br />
Depending on version (see below) the output from the RPi is connected to one of the following units. A BATC Filter Modulator board, a DATV Express Board, a LimeSDR (Mini or USB) or an Adalm Pluto, which modulates the RF carrier and produces the DVB-S or DVB-S2 DATV signal.<br />
<br />
====Audio and video inputs====<br />
<br />
The Portsdown transmitter will take audio and video inputs from the RPi camera, an EasyCap composite video USB dongle, C920 webcam and a USB sound card / dongle - all these are readily available from ebay and Amazon. More details are here: [[Portsdown Video Sources]].<br />
<br />
====Portsdown DATV receiver====<br />
<br />
On Portsdown 2020 and Portsdown 4, if you plug your [[MiniTioune|MiniTuioner USB receiver hardware]] into the RPi USB port and select "Rx" on the top level menu, you will have access to a fully functional DATV receiver.<br />
<br />
The received signal is displayed on the 7" touch screen but is also available as a UDP output on the network enabling it to be viewed on a larger PC using VLC or a similar software.<br />
<br />
==Further information==<br />
<br />
===Technical Index===<br />
<br />
An index of technical reference pages for the Portsdown system can be found here [[Portsdown Technical Index]].<br />
<br />
==Portsdown Evolution==<br />
<br />
There are now 4 distinct Portsdown versions:<br />
<br />
===Portsdown 4===<br />
<br />
The latest version of the Portsdown is the [[Portsdown 4]]. This uses the Raspios Buster operating system on a Raspberry Pi 4 with a 7 inch screen and a LimeSDR or ADALM Pluto. Unlike the previous version changes, it does not maintain hardware compatibility with the classic (filter-modulator) Portsdown.<br />
<br />
'''New builders are recommended to build a Portsdown 4 which, when used with a Adalm Pluto, is integrated with the Langstone Microwave transceiver software enabling an advanced multimode narrowband and DATV transceiver covering 70 MHz to 4 GHz for under £500.<br />
'''<br />
<br />
The first release of the Portsdown 4 was in late July 2020. Constructors can build their own SD Cards using the install file on GitHub [https://github.com/BritishAmateurTelevisionClub/portsdown4 BATC Portsdown 4 GitHub Page]. Pre-programmed SD Cards are also available from the BATC Shop.<br />
<br />
===Portsdown 2020 Buster===<br />
<br />
The Portsdown 2020 is Rpi3 based running Buster operating system - [[Portsdown 2020]]. This introduces support for the LimeDVB firmware on the LimeSDR Mini and also supports the use of standard firmware on the LimeSDR USB and the LimeNET Micro. <br />
<br />
The LongMynd receive capability has been improved with the addition of a player that will display some H265 signals. It will also control an external Jetson Nano with an HDMI capture device to allow the transmission of high definition H265 signals. <br />
<br />
This version will continue to be actively supported while the Buster operating system is current for the Raspberry Pi. No date has yet been set for the release of the next operating system version (Bullseye).<br />
<br />
===Portsdown 2019 Stretch===<br />
<br />
This was the second version, using the Raspbian Stretch Operating System - [[Portsdown 2019]]. Support for the 7 inch touchscreen was added and some WebCams could also be used as a video source. Audio capability was added for H264 encoding, and early support was provided for the LimeSDR Mini. <br />
<br />
Later versions also supported the LongMynd receive software enabling good DATV reception using a MiniTiouner. <br />
<br />
Again, this version is no longer supported, although it will continue to work as built.<br />
<br />
===Portsdown 2018 Classic===<br />
<br />
The original version was launched in 2017 - [[Portsdown 2018]]. It was based on the Raspbian Jessie operating system running on a Raspberry Pi 3 with a 3.5 inch touchscreen. It used the BATC-supplied Filter-Modulator board and could take video from the Raspberry Pi Camera or the EasyCap. It would transmit DVB-S MPEG-2 with audio, or H264 without audio. <br />
<br />
This version is no longer supported, although it will continue to work as built.</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8448UK ATV DX Records2021-06-26T12:29:10Z<p>G4FRE: /* 6cms (5.6GHz) */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: http://w6ze.org/DATV/Known-DATV-DX-Records_2020.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser http://hb9afo.ch/records/recordse.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 12-06-2021 || 138 kms || G8GTZ/P|| IO81FD - Dunkery Beacon || G4FRE/P || IO81XW - Cleeve common || DATV|| 333kS<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Coombe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|-<br />
| 25-06-2021 || 66 km|| G4FRE/P ||IO91BV - Notgrove || G8GTZ/P || IO91GI - Walbury|| One way only - DATV 333 ks/s||<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8424UK ATV DX Records2021-06-14T15:08:28Z<p>G4FRE: /* 24GHz */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: http://w6ze.org/DATV/Known-DATV-DX-Records_2020.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser http://hb9afo.ch/records/recordse.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV|| - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Combe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8423UK ATV DX Records2021-06-14T15:05:44Z<p>G4FRE: /* 9cms (3.4GHz) */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: http://w6ze.org/DATV/Known-DATV-DX-Records_2020.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser http://hb9afo.ch/records/recordse.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||333Ks DATV<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Combe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8422UK ATV DX Records2021-06-14T15:04:10Z<p>G4FRE: /* 9cms (3.4GHz) */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: http://w6ze.org/DATV/Known-DATV-DX-Records_2020.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser http://hb9afo.ch/records/recordse.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Combe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8421UK ATV DX Records2021-06-14T15:02:51Z<p>G4FRE: /* 13cms */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: http://w6ze.org/DATV/Known-DATV-DX-Records_2020.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser http://hb9afo.ch/records/recordse.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Combe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8420UK ATV DX Records2021-06-14T15:02:25Z<p>G4FRE: /* 13cms */</p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: http://w6ze.org/DATV/Known-DATV-DX-Records_2020.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser http://hb9afo.ch/records/recordse.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW- Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Combe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=UK_ATV_DX_Records&diff=8419UK ATV DX Records2021-06-14T15:01:23Z<p>G4FRE: </p>
<hr />
<div>This is a record of the UK DX records for each band. As well as the current record, it lists some previous records.<br />
<br />
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.<br />
<br />
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. <br />
<br />
World records are claimed based on the W6HHC list.<br />
<br />
==World DATV records==<br />
<br />
===W6HHC===<br />
<br />
Ken W6HHC, maintains the record of the world DATV records here: http://w6ze.org/DATV/Known-DATV-DX-Records_2020.pdf<br />
<br />
Please send Ken an e-mail if you know of a DATV QSO that should be added to this list! (via W6HHC@ARRL.net)<br />
<br />
===HB9AFO===<br />
<br />
HB9AFO also lists a record of mainly European records on all bands up to and including laser http://hb9afo.ch/records/recordse.htm<br />
<br />
==Historical records==<br />
<br />
[https://batc.org.uk/wp-content/uploads/cq-tv229.pdf CQ-TV 229] reports the following:<br />
<br />
* The world’s first ATV QSO was performed between G3BLV/T and G5ZT/T in May 1952<br />
<br />
* The first colour ATV QSO was performed over 12 miles from Great Baddow to Dunmow Essex in December 1956<br />
<br />
* An ATV QSO over 200 miles was completed between G3ILD and G3NOX/T end of 1963<br />
<br />
If you have any more details on these QSOs or other early records please contact any member of the committee.<br />
<br />
==50MHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 10-12-2014|| 4.5 kms || M0SKM || IO91RV || G4CPE || IO91SW ||543Ks||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 06-04-2019|| 140 kms|| G4FRE/P|| IO82QJ - Titterstone Clee || G8GTZ/P || IO91GI - Walbury ||250Ks||World record??<br />
<br />
|}<br />
<br />
==71MHz==<br />
UK only<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode !!Comments<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==146MHz==<br />
UK only band released for amateur use on October 10th 2014<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 30-12-2014 || 3.6 kms || G4CPE || IO91SW || G0WFT || || 333Ks||First One way<br />
|-<br />
| 11-01-2015 || 28 kms || G0LPS || IO94EQ || M0DTS || || 333Ks||First 2 way QSO<br />
|-<br />
| 21-02-2015 || 50 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 13-06-2015 || 95 kms || G8GTZ/P || IO91GI - Walbury Hill || G4CPE || IO91SW || 333Ks||<br />
|-<br />
| 13-06-2015 || 115 kms || G0LPS || IO94EQ || M0DTS/P || || 333Ks||<br />
|-<br />
| 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]<br />
<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 29-12-2016 || 277 kms || G8GTZ || IO91KF || G0MJW || IO83RO || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=4775&start=10 Report]<br />
|-<br />
| 30-12-2016 || 294 kms || G8LES || IO91LC || G0MJW || IO83RO || 333Ks||<br />
|-<br />
| 14-07-2018 || 313 kms || GI7UGV/P || IO74AU || G4CBW || IO83UB || 333Ks|| [https://forum.batc.org.uk/viewtopic.php?f=75&t=5453 Report]<br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==70cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 10-04- 1991 || 295 kms || G8EQZ/P || IO93PV79 || G8MNY/P || South Downs|| ATV || CQ-TV 151<br />
|-<br />
| Sept 1991 || 346 kms || GW7ATG/P || || G1COI/P || || ATV || IARU 1991 CQ-TV 158<br />
|-<br />
| 24-09- 2013 || 696 kms || G8GTZ || IO91KH || F1FY || JN16VB || DATV ||2 way QSO over 24 hour period! '''World record'''<br />
|}<br />
<br />
==23cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| June 1991 || 319 kms || G7ATV/P || Mendips || G8EQZ/P || IO93PV79 || ATV|| Summer fun 1991 CQ-TV 156<br />
|-<br />
| September 2003 || 327 kms || G7ATV/P || IO91QG || G4YTV || IO93UU82 || ATV|| IARU 2003<br />
|-<br />
| October 2010 || 440 kms || G4KLB || Bournemouth || M0DTS || Yarm || DATV|| '''World Record'''<br />
|}<br />
<br />
==13cms==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 263km || G6COL/P || IO93RG || G7ATV/P || IO81QC || ATV || IARU 2003<br />
|-<br />
| 9 June 2018 || 85 km || G8GTZ/P || IO90LX Wether Down || G8GKQ/P || IO80WP Lulworth || 1 MS DATV || <br />
|-<br />
| 9 June 2019 || 92 km || G8GTZ/P || IO81FD Dunkery Beacon || G8GKQ/P || IO80UV Okeford Hill|| DATV ||<br />
|-<br />
| 12-06-2021 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV|| <br />
|}<br />
<br />
==9cms (3.4GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 17-11-2019 || 73 kms|| G8GTZ/P || IO91GI Walbury || G4FRE/P || IO81XW Cleeve Common|| DATV||<br />
|-<br />
| 10-06-2018 || 154 kms|| GW4CBW/P || IO83FD - Bylchau || G3NWR/P || IO84ML - Kirkstone || DATV||<br />
|}<br />
<br />
==6cms (5.6GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 09-06-2017 || 80 kms || G8GTZ/P|| IO80WP - Povingdon Hill || G8GKQ/P || IO90LU - Portsdown Hill || ATV ||<br />
|-<br />
| July 2017 || 88 kms || G8GTZ/P|| IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| April 2018 || 153 kms|| GW3NWR/P|| IO83FD - Bylchau || M0KPW/G0HIK/P || IO84ML - Kirkstone || ATV ||<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|-<br />
| 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]<br />
|}<br />
<br />
==3cms (10GHz)==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| Sept 2003 || 76kms || G7ATV/P|| IO81QG - Mendips || GW0NOS/P || IO81FP || ATV|| IARU 2003<br />
|-<br />
| Spring 2007 || 50kms || G3PYB/P|| Hoggs Back || G8ADM || Stanmore || DATV one way || Scatterpoint March 2007<br />
|-<br />
| 03-07-2016 || 93 kms || G8GTZ/P|| IO91GI - Walbury || G8GKQ/P || IO80WP - Povingdon || 333 Ks||<br />
|-<br />
| 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] <br />
|-<br />
| 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]<br />
|-<br />
|}<br />
<br />
==24GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 11-06-2017 || 51 kms|| G1LPS || IO94EQ || M0DTS/P || IO94DF - Masham || DATV||<br />
|-<br />
| 10-06-2018 || 85 kms|| G8GTZ/P || IO90LX - Wether Down || G8GKQ/P || IO80WP - Povingdon Hill || DATV||<br />
|-<br />
| 14-05-2019 || 126.6 kms|| G4FRE/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' <br />
|-<br />
| 14-05-2019 || 126.6 kms|| G8GTZ/P || IO82QL - Brown Clee || G4CBW/P || IO83SO - Winter Hill || 1Ms DATV||'''World Record''' - [[IO83SO|Report]]<br />
|-<br />
| 09-06-2019 || 136.8 kms|| G8GTZ/P || IO81FD - Dunkery Beacon || G4FRE/P || IO81XW81 - Cleeve Common || 333Ks DATV||'''World Record'''<br />
|}<br />
<br />
==47GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!!Comments<br />
|-<br />
| 24-08-2019 || 34.9 km|| G4FRE ||IO82UC05 - Malvern || G0FRE/P || IO92BA - Broadway || DATV 1 Ms/s||<br />
|-<br />
| 14-10-2020 || 51.9 km|| G4FRE/P ||IO91GI61 - Combe Mast || G4LDR/P || IO90MX13 - Butser|| DATV 333 ks/s||<br />
|}<br />
<br />
==76GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Mode!! Comments<br />
|-<br />
| 09-06-2018 || 12 kms || G8GTZ/P || IO90LX - Wether Down || G4LDR/P || IO90LU - Portsdown Hill || 250Ks RB-TV|| <br />
|-<br />
| 13-01-2019 || 28 kms || G8GTZ/P || IO91JH - Hannington || G4LDR/P || IO91JB - Cheesefoot Head || 2Ms HD!|| <br />
|-<br />
| 28-01-2019 || 35.6 kms || G8GTZ/P || IO91GI61 - Combe Mast || G4LDR/P || IO91JB - Cheesefoot Head || 333Ks|| '''World record'''<br />
|}<br />
<br />
==134GHz==<br />
<br />
{| class="wikitable"<br />
|-<br />
! Date !! Distance !! Station 1 !! Location !! Station 2 !! Location !! Comments<br />
|-<br />
| Example || || || || || || <br />
|}</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_4_GPIO_Connections&diff=8416Portsdown 4 GPIO Connections2021-06-09T14:53:25Z<p>G4FRE: </p>
<hr />
<div>==RPi 4 GPIO pin out==<br />
<br />
[[File:GPIO-Pinout-Diagram-2.png|600px]]<br />
<br />
* Note the RPi4 (only) can be powered with 5v directly on to GPIO 2 and 4.<br />
<br />
===GPIO Connections for the Portsdown 4===<br />
<br />
Due to a reassignment of the GPIO pins on Raspberry Pi4, the connections are different to previous generations of Portsdown.<br />
<br />
There are 2 GPIO pins that have changed for the RPi 4. The important one is the Band LSB (or D0) which has moved from pin 28 to pin 32.<br />
<br />
Pin 32 is available on the GPIO breakout board as the "I" pin which is pin 2 on J03. More details here: [[:Media:PORTSDOWN INTERFACE SCH.pdf]]<br />
<br />
The other changed pin is the LE line for the ADF4351 (was on 27, now pin 33) which is only used if you are using an ADF4351 for the Portsdown Signal Generator. So, generally no need to worry about this one. This isn't true if your Portsdown has an attenuator card fitted! Move the LE wire with its 1 K ohm resistor to the Q terminal.<br />
<br />
The Portsdown 4 GPIO Connections are defined here: [[Portsdown 4 GPIO Connections]].<br />
<br />
===List of GPIO connections===<br />
<br />
{| class="wikitable"<br />
|-<br />
! Pin No !! BCM No !! Wiring Pi !! RPi Pri !! RPi Alt0 !! Primary Use !! Secondary Use !! Notes & GPIO breakout board connections <br />
|-<br />
| 1 || - || - || 3.3v || - || - || - || -<br />
|-<br />
| 2 || - || - || 5v || - || - || - || -<br />
|-<br />
| 3 || 2 || 8 || GPIO 2 || SDA1 || - || - || -<br />
|-<br />
| 4 || - || - || 5v || - || - || - || -<br />
|-<br />
| 5 || 3 || 9 || GPIO 3 || SCL1 || - || - || -<br />
|-<br />
| 6 || - || - || 0v || - || - || - || -<br />
|-<br />
| 7 || 4 || 7 || GPIO 4 || GPCLK0 || Band D2 (T) || Langstone band D2 || Label 7 on J07. "T" on 8 band boards<br />
|-<br />
| 8 || 14 || 15 || GPIO 14 || TXD0 || ADF5355 LE || Elcom & Nort SLO LE || For Sig Gen<br />
|-<br />
| 9 || - || - || 0v || - || - || - || -<br />
|-<br />
| 10 || 15 || 16 || GPIO 15 || RXD0 || Atten LE || - || Label 10 on J07<br />
|-<br />
| 11 || 17 || 0 || GPIO 17 || FL1 || - || Langstone PTT Demand in || Active low <br />
|-<br />
| 12 || 18 || 1 || GPIO 18 || SPI6_CE0_N || Transmit Demand || Langstone CW Key in || Label 12 on J07<br />
|-<br />
| 13 || 27 || 2 || GPIO 27 || SD0_DAT3 || "Active" LED || - || Active high. Label LED on J06 <br />
|-<br />
| 14 || - || - || 0v || - || - || - || -<br />
|-<br />
| 15 || 22 || 3 || GPIO 22 || SD0_CLK || Shutdown Button || - || Active high. Label PB on J06<br />
|-<br />
| 16 || 23 || 4 || GPIO 23 || SD0_CMD|| - || Langstone band D4 || -<br />
|-<br />
| 17 || - || - || 3.3v || - || - || - || -<br />
|-<br />
| 18 || 24 || 5 || GPIO 24 || SD0_DAT0 || - || Langstone band D5 || -<br />
|-<br />
| 19 || 10 || 12 || GPIO 10 || SPI0_MOSI || - || Langstone band D6 || -<br />
|-<br />
| 20 || - || - || 0v || - || - || - || -<br />
|-<br />
| 21 || 9 || 13 || GPIO 9 || SPI0_MISO || - || Langstone band D7 || -<br />
|-<br />
| 22 || 25 || 6 || GPIO 25 || SD0_DAT1 || - || Langstone band D3 || -<br />
|-<br />
| 23 || 11 || 14 || GPIO 11 || SPI0_SCLK || - || - || -<br />
|-<br />
| 24 || 8 || 10 || GPIO 8 || SPI0_CE0_N || - || - || -<br />
|-<br />
| 25 || - || - || 0v || - || - || - || -<br />
|-<br />
| 26 || 7 || 11 || GPIO 7 || SPI0_CE1_N || - || Noise source? || -<br />
|-<br />
| 27 || 0 || 30 || ID_SD || SDA0 || (was ADF4351 LE) || - || DO NOT CONNECT<br />
|-<br />
| 28 || 1 || 31 || ID_SC || SCL0 || (was Band D0) || (was Langstone band D0) || DO NOT CONNECT<br />
|-<br />
| 29 || 5 || 21 || GPIO 5 || GPCLK0 || spi clock || - || Label CLK on J04<br />
|-<br />
| 30 || - || - || 0v || - || - || - || -<br />
|-<br />
| 31 || 6 || 22 || GPIO 6 || GPCLK2 || spi data || - || Label DAT on J04<br />
|-<br />
| 32 || 12 || 26 || GPIO 12 || PWM0 || new Band D0 || new Langstone band D0 || Band select LSB. Label I on J03<br />
|-<br />
| 33 || 13 || 23 || GPIO 13 || PWM1 || new ADF4351 LE || - || Label Q on J03 <br />
|-<br />
| 34 || - || - || 0v || - || - || - || -<br />
|-<br />
| 35 || 19 || 24 || GPIO 19 || SPI6_MESO || Band D1 || Langstone band D1 || Band Select MSB on J05<br />
|-<br />
| 36 || 16 || 27 || GPIO 16 || FL0 || - || - || SR select LSB D0 on J02<br />
|-<br />
| 37 || 26 || 25 || GPIO 26 || SD0_DAT2 || - || - || SR select NSB D1 on J02<br />
|-<br />
| 38 || 20 || 28 || GPIO 20 || SPI6_MOSI || - || - || SR select MSB D2 on J02<br />
|-<br />
| 39 || - || - || 0v || - || - || - || -<br />
|-<br />
| 40 || 21 || 29 || GPIO 21 || SPI6_SCLK || TX LED/PTT Drive out || - || TX LED J05<br />
|}<br />
<br />
Note that the GPIO pin names are markedly different from the RPi 3B. Each pin on the RPi4 GPIO can be referred to in many ways: its physical pin number, the Broadcom I/O number, the Wiring Pi number or the primary or alternate names. Source for GPIO designations was the Raspberry Pi 4 Model B datasheet.<br />
<br />
Note that no connections should be made to GPIO Pins 27 and 28, otherwise the RPi might get stuck on the Rainbow Screen at boot. Previous connections to these pins are being moved to other pins 32 and 33. <br />
<br />
[[GPIO_breakout|J0x terminal block identities relate to the BATC GPIO breakout PCB from the club shop..]]<br />
<br />
Unused Willow breakout boards may work with Portsdown 4 because they needed extra connections to pins 27 & 28 on Portsdown 2018. These aren't required on P4 as noted here. <br />
<br />
Pins 36, 37 & 38 are still connected for extra DO, D1 & D2 connections. These are used with the 2-way RF Switch - F-M port of which is connected to the Pluto. All 3 lines are sent to logic high (3.3V) in Portsdown 2019 / 2020 and in the 4 on transmit and this switches in the Lime Mini.</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Portsdown_4_GPIO_Connections&diff=8415Portsdown 4 GPIO Connections2021-06-09T14:50:20Z<p>G4FRE: </p>
<hr />
<div>==RPi 4 GPIO pin out==<br />
<br />
[[File:GPIO-Pinout-Diagram-2.png|600px]]<br />
<br />
* Note the RPi4 (only) can be powered with 5v directly on to GPIO 2 and 4.<br />
<br />
===GPIO Connections for the Portsdown 4===<br />
<br />
Due to a reassignment of the GPIO pins on Raspberry Pi4, the connections are different to previous generations of Portsdown.<br />
<br />
There are 2 GPIO pins that have changed for the RPi 4. The important one is the Band LSB (or D0) which has moved from pin 28 to pin 32.<br />
<br />
Pin 32 is available on the GPIO breakout board as the "I" pin which is pin 2 on J03. More details here: [[:Media:PORTSDOWN INTERFACE SCH.pdf]]<br />
<br />
The other changed pin is the LE line for the ADF4351 (was on 27, now pin 33) which is only used if you are using an ADF4351 for the Portsdown Signal Generator. So, generally no need to worry about this one. This isn't true if your Portsdown has an attenuator card fitted! Move the LE wire with its 1 K ohm resistor to the Q terminal.<br />
<br />
The Portsdown 4 GPIO Connections are defined here: [[Portsdown 4 GPIO Connections]].<br />
<br />
===List of GPIO connections===<br />
<br />
{| class="wikitable"<br />
|-<br />
! Pin No !! BCM No !! Wiring Pi !! RPi Pri !! RPi Alt0 !! Primary Use !! Secondary Use !! Notes & GPIO breakout board connections <br />
|-<br />
| 1 || - || - || 3.3v || - || - || - || -<br />
|-<br />
| 2 || - || - || 5v || - || - || - || -<br />
|-<br />
| 3 || 2 || 8 || GPIO 2 || SDA1 || - || - || -<br />
|-<br />
| 4 || - || - || 5v || - || - || - || -<br />
|-<br />
| 5 || 3 || 9 || GPIO 3 || SCL1 || - || - || -<br />
|-<br />
| 6 || - || - || 0v || - || - || - || -<br />
|-<br />
| 7 || 4 || 7 || GPIO 4 || GPCLK0 || Band D2 (T) || Langstone band D2 || Label 7 on J07<br />
|-<br />
| 8 || 14 || 15 || GPIO 14 || TXD0 || ADF5355 LE || Elcom & Nort SLO LE || For Sig Gen<br />
|-<br />
| 9 || - || - || 0v || - || - || - || -<br />
|-<br />
| 10 || 15 || 16 || GPIO 15 || RXD0 || Atten LE || - || Label 10 on J07<br />
|-<br />
| 11 || 17 || 0 || GPIO 17 || FL1 || - || Langstone PTT Demand in || Active low <br />
|-<br />
| 12 || 18 || 1 || GPIO 18 || SPI6_CE0_N || Transmit Demand || Langstone CW Key in || Label 12 on J07<br />
|-<br />
| 13 || 27 || 2 || GPIO 27 || SD0_DAT3 || "Active" LED || - || Active high. Label LED on J06 <br />
|-<br />
| 14 || - || - || 0v || - || - || - || -<br />
|-<br />
| 15 || 22 || 3 || GPIO 22 || SD0_CLK || Shutdown Button || - || Active high. Label PB on J06<br />
|-<br />
| 16 || 23 || 4 || GPIO 23 || SD0_CMD|| - || Langstone band D4 || -<br />
|-<br />
| 17 || - || - || 3.3v || - || - || - || -<br />
|-<br />
| 18 || 24 || 5 || GPIO 24 || SD0_DAT0 || - || Langstone band D5 || -<br />
|-<br />
| 19 || 10 || 12 || GPIO 10 || SPI0_MOSI || - || Langstone band D6 || -<br />
|-<br />
| 20 || - || - || 0v || - || - || - || -<br />
|-<br />
| 21 || 9 || 13 || GPIO 9 || SPI0_MISO || - || Langstone band D7 || -<br />
|-<br />
| 22 || 25 || 6 || GPIO 25 || SD0_DAT1 || - || Langstone band D3 || -<br />
|-<br />
| 23 || 11 || 14 || GPIO 11 || SPI0_SCLK || - || - || -<br />
|-<br />
| 24 || 8 || 10 || GPIO 8 || SPI0_CE0_N || - || - || -<br />
|-<br />
| 25 || - || - || 0v || - || - || - || -<br />
|-<br />
| 26 || 7 || 11 || GPIO 7 || SPI0_CE1_N || - || Noise source? || -<br />
|-<br />
| 27 || 0 || 30 || ID_SD || SDA0 || (was ADF4351 LE) || - || DO NOT CONNECT<br />
|-<br />
| 28 || 1 || 31 || ID_SC || SCL0 || (was Band D0) || (was Langstone band D0) || DO NOT CONNECT<br />
|-<br />
| 29 || 5 || 21 || GPIO 5 || GPCLK0 || spi clock || - || Label CLK on J04<br />
|-<br />
| 30 || - || - || 0v || - || - || - || -<br />
|-<br />
| 31 || 6 || 22 || GPIO 6 || GPCLK2 || spi data || - || Label DAT on J04<br />
|-<br />
| 32 || 12 || 26 || GPIO 12 || PWM0 || new Band D0 || new Langstone band D0 || Band select LSB. Label I on J03<br />
|-<br />
| 33 || 13 || 23 || GPIO 13 || PWM1 || new ADF4351 LE || - || Label Q on J03 <br />
|-<br />
| 34 || - || - || 0v || - || - || - || -<br />
|-<br />
| 35 || 19 || 24 || GPIO 19 || SPI6_MESO || Band D1 || Langstone band D1 || Band Select MSB on J05<br />
|-<br />
| 36 || 16 || 27 || GPIO 16 || FL0 || - || - || SR select LSB D0 on J02<br />
|-<br />
| 37 || 26 || 25 || GPIO 26 || SD0_DAT2 || - || - || SR select NSB D1 on J02<br />
|-<br />
| 38 || 20 || 28 || GPIO 20 || SPI6_MOSI || - || - || SR select MSB D2 on J02<br />
|-<br />
| 39 || - || - || 0v || - || - || - || -<br />
|-<br />
| 40 || 21 || 29 || GPIO 21 || SPI6_SCLK || TX LED/PTT Drive out || - || TX LED J05<br />
|}<br />
<br />
Note that the GPIO pin names are markedly different from the RPi 3B. Each pin on the RPi4 GPIO can be referred to in many ways: its physical pin number, the Broadcom I/O number, the Wiring Pi number or the primary or alternate names. Source for GPIO designations was the Raspberry Pi 4 Model B datasheet.<br />
<br />
Note that no connections should be made to GPIO Pins 27 and 28, otherwise the RPi might get stuck on the Rainbow Screen at boot. Previous connections to these pins are being moved to other pins 32 and 33. <br />
<br />
[[GPIO_breakout|J0x terminal block identities relate to the BATC GPIO breakout PCB from the club shop..]]<br />
<br />
Unused Willow breakout boards may work with Portsdown 4 because they needed extra connections to pins 27 & 28 on Portsdown 2018. These aren't required on P4 as noted here. <br />
<br />
Pins 36, 37 & 38 are still connected for extra DO, D1 & D2 connections. These are used with the 2-way RF Switch - F-M port of which is connected to the Pluto. All 3 lines are sent to logic high (3.3V) in Portsdown 2019 / 2020 and in the 4 on transmit and this switches in the Lime Mini.</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Knucker&diff=8291Knucker2021-03-28T13:23:28Z<p>G4FRE: /* Receiver */</p>
<hr />
<div>The Knucker project is to develop a variable 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.<br />
<br />
==Why DVB-T==<br />
<br />
DX!!<br />
<br />
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 :-)<br />
<br />
We don't need DVB-T except for 29 / 50 MHz and mobile - it won't replace DVB-S for other bands and QO100!<br />
<br />
==Why Knucker==<br />
<br />
Why not? <br />
<br />
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....<br />
<br />
https://en.wikipedia.org/wiki/Knucker<br />
<br />
<br />
[[File:knucker dragon.jpg|200px]]<br />
<br />
==Timescales==<br />
<br />
December 2020 - Currently the project is at the design phase with a proof of concept receiver working on breadboard hardware.<br />
<br />
January 2021 - beta testing in progress<br />
<br />
The planned project release is currently March 2021 (but subject to change). 400 Serit NIMs on order due early March in plenty of time for the sporadic E season :-)<br />
<br />
==Receiver==<br />
<br />
The Knucker may be used as a DVB-T receiver in conjunction with the Ryde receiver. The interim software solution in the Ryde is only available via the SSH menu (option 11 "DVB-T RX") (DVB-T reception is NOT possible via the Ryde's onscreen menus). Choosing option 11 leads to the "Ryde DVB-T receiver" menu which allows receive parameters for DVB-T ONLY to be set.<br />
<br />
==Hardware==<br />
Charles G4GUO and the Knucker team have developed a variable bandwidth DVB-T receiver with USB interface around the Serit 4762 NIM / tuner.<br />
<br />
Draft specifications are 100KHz to 2MHz wide OFDM, frequency range 44 to 1002MHz<br />
<br />
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.<br />
<br />
The PCB design by Mike G0MJW is based on the MiniTiouner Version 2 board.<br />
<br />
'''Note that the DVB-T input to the NIM is the bottom F type nearest the PCB.''' <br />
<br />
====Version 1====<br />
<br />
Feasibility design which was never built.<br />
<br />
====Version 2====<br />
<br />
[[File:Knucker assembled V1 PCB.jpg|200px]]<br />
<br />
This was the first prototype build and not on general release - BOM and schematics are available here: [[File:Knucker.xlsx]]<br />
<br />
====Version 3====<br />
<br />
First general release PCB - limited availability in January 2021. General release March 2021<br />
<br />
[[File:render.jpg|400px]]<br />
<br />
[[File:Knucker PCB.jpg|200px|PCB Image]]<br />
<br />
'''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'''<br />
<br />
'''Note 2 - Use the F type nearest the PCB for DVB-T reception'''<br />
<br />
Schematic is here: [[:media:Knucker schematic V3.pdf]]<br />
<br />
BOM is here [[:media:knucker BOM V3.xlsx]]<br />
<br />
====USB Module====<br />
<br />
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:<br />
<br />
Download and install the FTDI FTprog software from here: <br />
<br />
Download, unzip and save this file [[:File:combituner.zip]] It will save as Knucker DVBT.xml<br />
<br />
Put the USB module in to the PCB and connect the USB port to the PC - you should here the Windows bing bong sound.<br />
<br />
Run FTprog:<br />
<br />
[[File:ftprog1.JPG|400px]]<br />
<br />
Go - File>open template and open the .xml file<br />
<br />
Go - Devices>Scan and parse<br />
<br />
Your screen should now look like this:<br />
<br />
[[File:ftprog2.JPG|400px]]<br />
<br />
Right click on the "Device:0" line<br />
<br />
Apply template - select the template you have opened.<br />
<br />
Right click again - Program Device<br />
<br />
Go - Devices>Scan and parse and it should show your device as programmed.<br />
<br />
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'<br />
<br />
==Software==<br />
<br />
Charles G4GUO has developed a core Linux DVB-T receiver application.<br />
<br />
===Portsdown===<br />
<br />
This 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<br />
<br />
===Ryde set top box===<br />
<br />
An interim SSH Menu-driven version has also been integrated into the Ryde Build. No remote control functions are available in this build, although full integration with Ryde is on the to-do list.<br />
<br />
==Transmit==<br />
<br />
===Portsdown system===<br />
<br />
Due to excellent cooperation between Charles and Dave, a Portsdown DVB-T transmitter using the Pluto SDR has been integrated into the Portsdown 4.<br />
<br />
The first official release was made on 1st February 2021<br />
<br />
https://forum.batc.org.uk/viewtopic.php?t=7158&p=26210#p26210<br />
<br />
===DATV Express===<br />
<br />
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. <br />
<br />
It does work in some configurations with the Pluto (and possibly the LimeSDR) but these SDRs are not yet properly supported.<br />
<br />
For initial testing, set the DATV Express to use Mono MPA audio and DVB-T using the settings shown below.<br />
<br />
[[File:DATV Express Settings.PNG|471px]]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Ryde_Receiver&diff=8290Ryde Receiver2021-03-28T13:20:00Z<p>G4FRE: </p>
<hr />
<div>The BATC Ryde receiver is a stand-alone receiver or Set Top Box (STB) designed specifically for Digital Amateur TV with similar functionality to a consumer STB.<br />
<br />
It is controlled by an IR remote and has a "point and shoot" interface - simply enter frequency and SR and the Ryde will look for DVB-S or DVB-S2 DATV signals without the need to enter Bouquets, transponders or scan across a range of frequencies.<br />
[[File:Ryde_With_Menu_Small.jpg|500px|center]]<br />
<br />
* The Ryde is a standalone receiver controlled by an infra-red remote with on-screen menus<br />
* The Ryde directly drives an external HDMI or composite video (PAL/NTSC) monitor <br />
* The Ryde does not require any additional hardware such as a PC <br />
* The Ryde provides a lock indication output for use at DATV repeater sites.<br />
<br />
<br />
===Project history and status===<br />
<br />
The Ryde receiver project was conceived by G8GTZ, the requirements were published in April 2020 and first beta models were demonstrated in late June 2020 with the first development release in Mid July 2020<br />
<br />
==Ryde Hardware==<br />
<br />
The Ryde receiver is simple to construct and is built from a standard Raspberry Pi 4 and standard [[MiniTiouner hardware Version 2|MiniTiouner USB receiver hardware]]. Full hardware details are described on this page: [[Ryde Hardware]].<br />
<br />
====Version 1====<br />
<br />
The first version of Ryde is based around a Raspberry Pi 4 and the [[MiniTiouner hardware Version 2|BATC MiniTiouner V2 PCB]] connected via USB. It is intended that the software will continue to support this version even after version 2 hardware is released.<br />
<br />
[[File:Ryde1 boxed.jpg|500px|center]]<br />
<br />
The above shows the four of the main parts of the Ryde Version 1:-<br />
<br />
1. Raspberry Pi 4<br />
<br />
2. GPIO breakout PCB<br />
<br />
3. 12V input 5.2V 5A output DC to DC converter<br />
<br />
4. Switch and IR sensor PCB<br />
<br />
All parts are mounted in a Eddystone 26827PSLA Diecast box (Farnell Ordercode 301589) with room for future expansion. The BATC MiniTiouner is mounted in a separate box connected by USB to the Raspberry Pi.<br />
<br />
====Version 2====<br />
<br />
A single PCB is in development removing the need for the USB interface. This will be a standalone alone unit with the RPi mounted on the motherboard but will require users to buy a complete new set of components including Serit tuner.<br />
<br />
====IR remote control====<br />
<br />
More details on how to connect an IR sensor to the Ryde, which remote control to use and how to program your own control are here: [[Ryde remote controls]]<br />
<br />
====RF input band switching====<br />
<br />
The Ryde has been designed to control the Portsdown 4 and 8 way RF switches https://wiki.batc.org.uk/8-Band_RF_Output_Switch The RF switch should be built leaving out the MMIC stage U10 which is bypassed with a short circuit or a 1nf capacitor.<br />
<br />
====GPIO connection==== <br />
<br />
A GPIO breakout PCB is available from the BATC shop - NOTE, this PCB is intended to be mounted to go outside the Pi4 profile as shown above.<br />
<br />
More details here: [[Ryde GPIO breakout|https://wiki.batc.org.uk/Ryde_GPIO_breakout]]<br />
<br />
'''Note that the Raspberry Pi 4 GPIO connections are different to the Raspberry Pi 3''' <br />
<br />
Full details of the Ryde GPIO connections are here: [[Ryde_GPIO_Connections]]<br />
<br />
==Ryde Software==<br />
<br />
There are 2 ways to get the Ryde Software. As with Portsdown, you can buy a pre-programmed SD Card from the BATC Shop; or you can build your own card by following the instructions here: [https://github.com/BritishAmateurTelevisionClub/ryde-build BATC GitHub Ryde Build Page]. The process will be familiar to anyone who has built a Portsdown SD Card.<br />
<br />
Once you have bought or built your card, please read this information about using the [[Ryde Software]].<br />
<br />
===Ryde presets===<br />
<br />
There are 10 presets in the default build. You can modify each of them from the on-screen menu, but these on-screen changes are volatile and will be lost when you close the application or reboot.<br />
<br />
You can modify the detail of each preset permanently from the ssh console menu (reached by entering 'menu' at the command prompt). However, you cannot modify the preset names. This was too complicated to handle in the Menu.<br />
<br />
Each preset has frequency, SR and band defined. Frequencies and SRs can be multiple for scanning.<br />
I have defined 8 bands. Each band has LO Frequency, LO side, LNB voltage, Tuner port and Band GPIO setting defined. Note that Band GPIO setting does not have any effect yet. You cannot modify the band names, but can modify all the other band parameters.<br />
<br />
You can select which preset channel the receiver starts up on. It does not have to be the QO-100 beacon.<br />
<br />
===Ryde scanning modes===<br />
<br />
Primarily designed for use in at repeater sites, the Ryde can be set to scan multiple SRs on a single frequency or multiple SRs on multiple frequencies. Set these up as follows:<br />
<br />
* Log in via SSH<br />
<br />
* For a repeater go to menu 2 and define which preset to use on start up.<br />
<br />
* Then go to menu 4 and customise your preset - enter frequency (or frequencies) followed by up to 4 symbol rates. Restart your Ryde and it will use the start up preset and scan Frequencies and Symbol rates as entered.<br />
<br />
Note under menu 3 you set which LNB F type port is used on which band so you can have 70cms use the top port and 23cms use the bottom port.<br />
<br />
==The Ryde as a Repeater Receiver==<br />
<br />
As well as a dedicated shack receiver without the need for a PC, the Ryde is also designed for use at repeater sites. Features in the requirement specification include the following (all subject to feasibility and commitment by development team volunteers):<br />
<br />
* Reliable lock indicator output from the RPi GPIO connector.<br />
* Status banner showing station ID, MER and D number displayed after signal lock (Display period adjustable in config menu)<br />
* Status banner displayed when GPIO port triggered (can be triggered by external DTMF detector etc)<br />
* Symbol rate search across a number of presets. Feature would enable a single Ryde receiver to listen on 437MHz and receive 2Ms, 1Ms, 333ks and 125ks signals<br />
<br />
==The Ryde as a DVB-T Receiver==<br />
<br />
The Ryde is also capable of receiving DVB-T signals in conjunction with the Knucker receiver. The interim software solution in the Ryde is only available via the SSH menu (option 11 "DVB-T RX") (DVB-T reception is NOT possible via the Ryde's onscreen menus). Choosing option 11 leads to the "Ryde DVB-T receiver" menu which allows receive parameters for DVB-T ONLY to be set. <br />
<br />
<br />
==FAQ==<br />
<br />
If you are having problems with your Ryde Receiver, please check these FAQs before posting any questions on the BATC Forum. [[Ryde FAQ]]<br />
<br />
==Original Requirement Specification==<br />
<br />
The original requirement specification for the Ryde Receiver, written in April 2020 by G8GTZ, can be found here: [[Ryde Requirement Specification]].</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Knucker&diff=7916Knucker2021-01-09T14:21:46Z<p>G4FRE: </p>
<hr />
<div>The Knucker project is to develop a variable 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.<br />
<br />
==Why DVB-T==<br />
<br />
DX!!<br />
<br />
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 :-)<br />
<br />
We don't need DVB-T except for 29 / 50 MHz and mobile - it won't replace DVB-S for other bands and QO100!<br />
<br />
==Why Knucker==<br />
<br />
Why not? <br />
<br />
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....<br />
<br />
https://en.wikipedia.org/wiki/Knucker<br />
<br />
<br />
[[File:knucker dragon.jpg|200px]]<br />
<br />
==Timescales==<br />
<br />
December 2020 - Currently the project is at the design phase with a proof of concept receiver working on bread board hardware.<br />
<br />
==Receiver==<br />
<br />
===Hardware===<br />
Charles G4GUO and the Knucker team have developed a variable bandwidth DVB-T receiver with USB interface around the Serit 4762 NIM / tuner.<br />
<br />
Draft specifications are 100KHz to 2MHz wide OFDM, frequency range 44 to 1002MHz<br />
<br />
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.<br />
<br />
The PCB design by Mike G0MJW is based on the MiniTiouner Version 2 board.<br />
<br />
====Version 1====<br />
<br />
Feasibility design which was never built.<br />
<br />
====Version 2====<br />
<br />
[[File:Knucker assembled V1 PCB.jpg|400px]]<br />
<br />
This was the first protype build and not on general release - BOM and schematics are available here: [[File:Knucker.xlsx]]<br />
<br />
====Version 3====<br />
<br />
[[File:render.jpg|400px]]<br />
<br />
First general release PCB - if you bought your PCB from the BATC shop, this is the information you need.<br />
<br />
Note 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<br />
<br />
Schematic is here: [[:File:Knucker schematic V3.pdf]]<br />
<br />
BOM is here [[:File:knucker BOM V3.xlsx]]<br />
<br />
====USB Module====<br />
<br />
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. <br />
<br />
[[:File:combituner.zip]]<br />
<br />
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'<br />
<br />
===Software===<br />
<br />
It is intended to develop a core Linux DVB-T receiver application that will be integrated into the LongMynd receiver core. <br />
<br />
The first product implementation will be in the Portsdown DATV system which will be enhanced to include a DVB-T receiver. Dave G8GKQ released the first alpha code for testing in early January 2021.<br />
<br />
It is also envisaged that a set-top box version of the code will be developed at some point using the RydePlayer and would be known as the Knucker receiver.<br />
<br />
==Transmit==<br />
<br />
===DATV Express===<br />
<br />
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. <br />
<br />
It does work in some configurations with the Pluto (and possibly the LimeSDR) but these SDRs are not yet properly supported.<br />
<br />
For initial testing, set the DATV Express to use Mono MPA audio and DVB-T using the settings shown below.<br />
<br />
[[File:DATV Express Settings.PNG|471px]]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Knucker&diff=7915Knucker2021-01-09T14:19:42Z<p>G4FRE: </p>
<hr />
<div>The Knucker project is to develop a variable 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.<br />
<br />
==Why DVB-T==<br />
<br />
DX!!<br />
<br />
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 :-)<br />
<br />
We don't need DVB-T except for 29 / 50 MHz and mobile - it won't replace DVB-S for other bands and QO100!<br />
<br />
==Why Knucker==<br />
<br />
Why not? <br />
<br />
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....<br />
<br />
https://en.wikipedia.org/wiki/Knucker<br />
<br />
<br />
[[File:knucker dragon.jpg|200px]]<br />
<br />
==Timescales==<br />
<br />
December 2020 - Currently the project is at the design phase with a proof of concept receiver working on bread board hardware.<br />
<br />
==Receiver==<br />
<br />
===Hardware===<br />
Charles G4GUO and the Knucker team have developed a variable bandwidth DVB-T receiver with USB interface around the Serit 4762 NIM / tuner.<br />
<br />
Draft specifications are 100KHz to 2MHz wide OFDM, frequency range 44 to 1002MHz<br />
<br />
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.<br />
<br />
The PCB design by Mike G0MJW is based on the MiniTiouner Version 2 board.<br />
<br />
====Version 1====<br />
<br />
Feasibility design which was never built.<br />
<br />
====Version 2====<br />
<br />
[[File:Knucker assembled V1 PCB.jpg|400px]]<br />
<br />
This was the first protype build and not on general release - BOM and schematics are available here: [[File:Knucker.xlsx]]<br />
<br />
====Version 3====<br />
<br />
[[File:render.jpg|400px]]<br />
<br />
First general release PCB - if you bought your PCB from the BATC shop, this is the information you need.<br />
<br />
Note 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<br />
<br />
Schematic is here: [[:File:Knucker schematic V3.pdf]]<br />
<br />
BOM is here [[:File:knucker BOM V3.xlsx]]<br />
<br />
====USB Module====<br />
<br />
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. <br />
<br />
[[:File:combituner.zip]]<br />
<br />
Full instructions on how to program the unit are here: http://www.vivadatv.org/viewtopic.php?f=80&t=379<br />
<br />
<br />
After reprogramming confirm you have been succesful by doing a "scan and parse" action and ensuring that ProductDesc is shown as 'CombiTuner-Express'<br />
<br />
===Software===<br />
<br />
It is intended to develop a core Linux DVB-T receiver application that will be integrated into the LongMynd receiver core. <br />
<br />
The first product implementation will be in the Portsdown DATV system which will be enhanced to include a DVB-T receiver. Dave G8GKQ released the first alpha code for testing in early January 2021.<br />
<br />
It is also envisaged that a set-top box version of the code will be developed at some point using the RydePlayer and would be known as the Knucker receiver.<br />
<br />
==Transmit==<br />
<br />
===DATV Express===<br />
<br />
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. <br />
<br />
It does work in some configurations with the Pluto (and possibly the LimeSDR) but these SDRs are not yet properly supported.<br />
<br />
For initial testing, set the DATV Express to use Mono MPA audio and DVB-T using the settings shown below.<br />
<br />
[[File:DATV Express Settings.PNG|471px]]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Knucker&diff=7914Knucker2021-01-09T14:18:20Z<p>G4FRE: </p>
<hr />
<div>The Knucker project is to develop a variable 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.<br />
<br />
==Why DVB-T==<br />
<br />
DX!!<br />
<br />
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 :-)<br />
<br />
We don't need DVB-T except for 29 / 50 MHz and mobile - it won't replace DVB-S for other bands and QO100!<br />
<br />
==Why Knucker==<br />
<br />
Why not? <br />
<br />
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....<br />
<br />
https://en.wikipedia.org/wiki/Knucker<br />
<br />
<br />
[[File:knucker dragon.jpg|200px]]<br />
<br />
==Timescales==<br />
<br />
December 2020 - Currently the project is at the design phase with a proof of concept receiver working on bread board hardware.<br />
<br />
==Receiver==<br />
<br />
===Hardware===<br />
Charles G4GUO and the Knucker team have developed a variable bandwidth DVB-T receiver with USB interface around the Serit 4762 NIM / tuner.<br />
<br />
Draft specifications are 100KHz to 2MHz wide OFDM, frequency range 44 to 1002MHz<br />
<br />
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.<br />
<br />
The PCB design by Mike G0MJW is based on the MiniTiouner Version 2 board.<br />
<br />
====Version 1====<br />
<br />
Feasibility design which was never built.<br />
<br />
====Version 2====<br />
<br />
[[File:Knucker assembled V1 PCB.jpg|400px]]<br />
<br />
This was the first protype build and not on general release - BOM and schematics are available here: [[File:Knucker.xlsx]]<br />
<br />
====Version 3====<br />
<br />
[[File:render.jpg|400px]]<br />
<br />
First general release PCB - if you bought your PCB from the BATC shop, this is the information you need.<br />
<br />
Note 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<br />
<br />
Schematic is here: [[:File:Knucker schematic V3.pdf]]<br />
<br />
BOM is here [[:File:knucker BOM V3.xlsx]]<br />
<br />
====USB Module====<br />
<br />
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. <br />
After reprogramming confirm you have been succesful by doing a "scan and parse" action and ensuring that ProductDesc is shown as 'CombiTuner-Express'<br />
<br />
<br />
[[:File:combituner.zip]]<br />
<br />
Full instructions on how to program the unit are here: http://www.vivadatv.org/viewtopic.php?f=80&t=379<br />
<br />
===Software===<br />
<br />
It is intended to develop a core Linux DVB-T receiver application that will be integrated into the LongMynd receiver core. <br />
<br />
The first product implementation will be in the Portsdown DATV system which will be enhanced to include a DVB-T receiver. Dave G8GKQ released the first alpha code for testing in early January 2021.<br />
<br />
It is also envisaged that a set-top box version of the code will be developed at some point using the RydePlayer and would be known as the Knucker receiver.<br />
<br />
==Transmit==<br />
<br />
===DATV Express===<br />
<br />
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. <br />
<br />
It does work in some configurations with the Pluto (and possibly the LimeSDR) but these SDRs are not yet properly supported.<br />
<br />
For initial testing, set the DATV Express to use Mono MPA audio and DVB-T using the settings shown below.<br />
<br />
[[File:DATV Express Settings.PNG|471px]]</div>G4FREhttps://wiki.batc.org.uk/index.php?title=Knucker&diff=7890Knucker2021-01-04T20:29:17Z<p>G4FRE: /* USB Module */</p>
<hr />
<div>The Knucker project is to develop a variable 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.<br />
<br />
===Why Knucker===<br />
<br />
Why not? <br />
<br />
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....<br />
<br />
https://en.wikipedia.org/wiki/Knucker<br />
<br />
<br />
[[File:knucker dragon.jpg|200px]]<br />
<br />
==Timescales==<br />
<br />
December 2020 - Currently the project is at the design phase with a proof of concept receiver working on bread board hardware.<br />
<br />
==Receiver==<br />
<br />
===Hardware===<br />
Charles G4GUO and the Knucker team have developed a variable bandwidth DVB-T receiver with USB interface around the Serit 4762 NIM / tuner.<br />
<br />
Draft specifications are 100KHz to 2MHz wide OFDM, frequency range 44 to 1002MHz<br />
<br />
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 low SR capability.<br />
<br />
[[File:Knucker assembled V1 PCB.jpg|400px]]<br />
<br />
The PCB design by Mike G0MJW is based on the MiniTiouner Version 2 board - the photo shows the first built and tested prototype .<br />
<br />
BOM and schematics are available here: [[File:Knucker.xlsx]]<br />
<br />
====USB Module====<br />
<br />
The USB module will require reprogramming with this xml file using the FTDI program called FT prog - the standard MiniTiouner USB module from the BATC will not work but can be re-programmed.<br />
<br />
Full instructions on how to program the unit are here: http://www.vivadatv.org/viewtopic.php?f=80&t=379<br />
<br />
[[:File:combituner.zip]]<br />
<br />
===Software===<br />
<br />
It is intended to develop a core Linux DVB-T receiver application that will be integrated into the LongMynd receiver core. <br />
<br />
It is planned that the Portsdown DATV system will be enhanced to include the DVB-T receiver.<br />
<br />
It is envisaged that a set-top box version of the code will be developed using the RydePlayer and would be known as the Knucker receiver. <br />
<br />
==Transmit==<br />
<br />
===DATVexpress===<br />
<br />
Charles G4GUO is currently developing a variable bandwidth OFDM version of the DATVexpress software. This will work with the DATVExpress card, Pluto and Lime SDR.<br />
<br />
==Beta testing==<br />
<br />
We will be looking for technically competent people to help test the system in it's intended applications - low band VHF, HF and mobile.<br />
<br />
Send us an email if you are interested in helping.<br />
<br />
==Applications==<br />
<br />
DX!!<br />
<br />
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 :-)</div>G4FREhttps://wiki.batc.org.uk/index.php?title=146_MHz_amplifiers&diff=7777146 MHz amplifiers2020-11-29T13:32:02Z<p>G4FRE: </p>
<hr />
<div>===RD series===<br />
<br />
Rob M0DTS published an easy to construct design using the RD series of FETs in CQ-TV 247 and 249 - a good way to get a clean 5 watts on 146 MHz. (The full article is available in high resolution in the magazine)<br />
<br />
[[File:rd70.JPG|400px]]<br />
<br />
Or have a look at M0DTS web page. http://www.m0dts.co.uk/index.php?tag=146MHz<br />
<br />
===Mitsubishi power modules===<br />
<br />
The Mitsubshi RA60H1317M 60 watt brick can be driven via the YU1LM filter and a 10 dB attenuator from the Portsdown transmitter to provide approximately 7 watts output. <br />
<br />
[[File:146 333ks +10dB 7watts.JPG|400px]]<br />
<br />
Ready built amplifiers using this module are available from Bert Modermann PE1RKI http://www.pe1rki.com/<br />
<br />
<br />
<br />
For those who want to roll their own the following were published:-<br />
<br />
* Sam Jewell G4DDK, 8W 2m amplifier.<br />
http://www.g4ddk.com/144MHz8WPA.pdf<br />
<br />
* Ian White GM3SEK application note on using the high power Mitsubishi modules<br />
http://g4ddk.com/AN4.pdf<br />
<br />
Components are available from the following<br />
<br />
*Minikits <br />
<br />
http://www.minikits.com.au/ <br />
specifically for PCB assemblies http://www.minikits.com.au/electronic-kits/rf-amplifiers/rf-high-power<br />
<br />
* Anglia Live, suppliers of Mitsubishi power modules<br />
https://www.anglia-live.com/</div>G4FRE