BATC Wiki - User contributions [en-gb]

29 MHz

2026-07-21T09:05:16Z

G8LCE: /* Introduction */

==Introduction==

The 2022 RSGB band plan http://rsgb.org/main/files/2022/02/220126_2022-Band-Plans_RadCom-web.pdf identifies 29000 - 29510 kHz segment as available for experimental wide bandwidth operation on a non-interference basis to other stations, including the amateur satellite service segment at 29300 -
29510 kHz. It is recommended that stations use a center frequency of 29.250 MHz to avoid causing interference to the weak-signal satellite downlinks of OSCAR 7 and CAMSAT satellites.

In practice, this means we can experiment with reduced bandwidth DATV on 10m. The 10m band opens for worldwide DX around solar maximum, so theoretically and now in practice it is possible to transmit video worldwide.

These pages are intended cover the experiments, noting they are experiments, that may require significant effort in construction of equipment, development of software and quite a bit of patience in order to participate. So far, signals have been sent across the Atlantic by several amateurs using very low symbol rates. There is much still to do to improve performance and reliability. If that interests you, you are in the right place.

==Propagation Effects and multipath==

The F2 and E skip that provides good DX on 10m usually comes at the cost of multipath distortion. In practice this means our usual phase modulated signals (e.g. Quadrature Phase Shift keying (QPSK)) of above a few kHz bandwidth can't be decoded. Success so far has used relatively low bandwidth 18ks/s QPSK in a bandwidth of ~20kHz but even this is too wideband and does not deliver particularly good video. Here are three narrow band signals received by a networked radio in Pennsylvania. They are Gareth G4XAT, Rob M0DTS and Mike G0MJW. All were about 100W, with Mike and rob using beams and Gareth a vertical. The multipath distortion is very apparent, as is the difference in propagation paths.

[[File:Multipath1.jpg|400px]]

Despite the good signal strengths, none of these signals were decodable except very briefly whenever a single path became sufficiently dominant.

The solution to multipath for digital audio broadcasting at HF and VHF and terrestrial television at VHD/UHF is to use a modulation mode, called Orthogonal Frequency Division Multiplexing (OFDM) where many narrow bandwidth signals are stacked next to each other.

[https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing Wikipedia - OFDM]

Each narrow bandwidth carrier is less impacted by multipath and clever algorithms can be used to compensate and even take advantage of the multiple paths to either increase data throughput (as in MIMO) or improve the signal to noise ratio.

Some form of OFDM is likely to be the best technique, but requires software development to enable it.

==Equipment for 29MHz DATV==

Generally, we can generate DATV signals in the same way we do for higher frequencies using software defined radios (SDR).

The popular SDRs that are used to transmit DATV at higher frequencies are the Adlam-pluto and Lime Mini. The pluto does not work below 70MHz and while the Lime Mini does cover 29MHz natively, in practice the spectrum it generates in this region is not sufficiently clean to use on the air. Consequently, to use either device for transmitting it is best to down-convert from a higher frequency, for example with a 2m to 10m transmit downconverter.

Similarly on receive, the popular minitiouner used at higher frequencies does not tune down to 29 MHz. An upconverter is needed to translate the signal to an IF within the range of the tuner.

A better option for receive may be to use an HF SDR, e.g. an Airspy, RFSpace SDRIQ/CloudSDR or an RTL dongle and decode the signal in a software package like GnuRadio or SDRAngel. Both of these software packages can also be used to transmit.

Information on a simple 2m to 10m frequency transverter is [[29MHz transverter]]

Information on building power amplifiers for 29 MHz DATV is [here]

Information on suitable antennas for 29 MHz is [here]

==Software for 29MHz DATV==

ffmpeg - for generating the encoded video stream
SDRAngel - for receiving

==Generating a low rate transport stream==

There isn't much bandwidth available on 10m which means relatively low symbol rates are needed, probably occupying no more than 100kHz of bandwidth, ideally less. This means we need to use the most efficient video compression readily available to us, at the time of writing this is H265 which can produce good video in 100kb/s and fair video in less. The ffmpeg software package can encode video and generate low data rates mpeg transport streams. Using ffmpeg requires a complex set of command line options that must be tuned to get the best quality. For example the following developed by Rob, M0DTS takes input from OBS and uses an Nvidia graphics card to generate a transport stream for a Pluto running Evariste F5OEO's firmware:

ffmpeg -f dshow -i video="OBS-Camera" -vcodec hevc_nvenc -g 8 -s 213x120 -bf 0 -pix_fmt yuv420p -b:v 10k -bufsize 30k -r 2 -preset fast -profile:v main -rc cbr_hq -rc-lookahead 5 -an -f mpegts -streamid 0:256 -metadata service_provider="YourCall" -metadata service_name="YourName" -max_delay 2500000 -pcr_period 80 -pat_period 0.4 "udp://192.168.2.1:8282?pkt_size=1316"

This is pretty complex and breaking this down is out of scope and might reveal many liberties being taken but it did actually work. Here is an example received trans-atlantic using SDRAngel.

[[File:SDRAngel1.jpg|400px]]

The above parameters need to be tweaked for each required but rate, which will depend on the transmissions bandwidth, modulation and forward error correction.

29 MHz

2026-07-21T09:04:45Z

G8LCE: /* Introduction */

==Introduction==

The 2022 RSGB band plan http://rsgb.org/main/files/2022/02/220126_2022-Band-Plans_RadCom-web.pdf identifies 29000 - 29510 kHz segment as available for experimental wide bandwidth operation on a non-interference basis to other stations, including the amateur satellite service segment at 29300 -
29510 kHz. It is recommended that stations use a center frequency of 29.250 MHz to avoid causing interference to the weak-signal satellite downlinks of OSCAR 7 and CAMSAT satellites.

In practice, this means we can experiment with reduced bandwidth DATV on 10m. The 10m band opens for worldwide DX around solar maximum, so theoretically and now in practice it is possible to transmit video worldwide.

These pages are intended cover the experiments, noting they are experiments, that may require significant effort in construction of equipment, development of software and quite a bit patience in order to participate. So far, signals have been sent across the Atlantic by several amateurs using very low symbol rates. There is much still to do to improve performance and reliability. If that interests you, you are in the right place.

==Propagation Effects and multipath==

The F2 and E skip that provides good DX on 10m usually comes at the cost of multipath distortion. In practice this means our usual phase modulated signals (e.g. Quadrature Phase Shift keying (QPSK)) of above a few kHz bandwidth can't be decoded. Success so far has used relatively low bandwidth 18ks/s QPSK in a bandwidth of ~20kHz but even this is too wideband and does not deliver particularly good video. Here are three narrow band signals received by a networked radio in Pennsylvania. They are Gareth G4XAT, Rob M0DTS and Mike G0MJW. All were about 100W, with Mike and rob using beams and Gareth a vertical. The multipath distortion is very apparent, as is the difference in propagation paths.

[[File:Multipath1.jpg|400px]]

Despite the good signal strengths, none of these signals were decodable except very briefly whenever a single path became sufficiently dominant.

The solution to multipath for digital audio broadcasting at HF and VHF and terrestrial television at VHD/UHF is to use a modulation mode, called Orthogonal Frequency Division Multiplexing (OFDM) where many narrow bandwidth signals are stacked next to each other.

[https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing Wikipedia - OFDM]

Each narrow bandwidth carrier is less impacted by multipath and clever algorithms can be used to compensate and even take advantage of the multiple paths to either increase data throughput (as in MIMO) or improve the signal to noise ratio.

Some form of OFDM is likely to be the best technique, but requires software development to enable it.

==Equipment for 29MHz DATV==

Generally, we can generate DATV signals in the same way we do for higher frequencies using software defined radios (SDR).

The popular SDRs that are used to transmit DATV at higher frequencies are the Adlam-pluto and Lime Mini. The pluto does not work below 70MHz and while the Lime Mini does cover 29MHz natively, in practice the spectrum it generates in this region is not sufficiently clean to use on the air. Consequently, to use either device for transmitting it is best to down-convert from a higher frequency, for example with a 2m to 10m transmit downconverter.

Similarly on receive, the popular minitiouner used at higher frequencies does not tune down to 29 MHz. An upconverter is needed to translate the signal to an IF within the range of the tuner.

A better option for receive may be to use an HF SDR, e.g. an Airspy, RFSpace SDRIQ/CloudSDR or an RTL dongle and decode the signal in a software package like GnuRadio or SDRAngel. Both of these software packages can also be used to transmit.

Information on a simple 2m to 10m frequency transverter is [[29MHz transverter]]

Information on building power amplifiers for 29 MHz DATV is [here]

Information on suitable antennas for 29 MHz is [here]

==Software for 29MHz DATV==

ffmpeg - for generating the encoded video stream
SDRAngel - for receiving

==Generating a low rate transport stream==

There isn't much bandwidth available on 10m which means relatively low symbol rates are needed, probably occupying no more than 100kHz of bandwidth, ideally less. This means we need to use the most efficient video compression readily available to us, at the time of writing this is H265 which can produce good video in 100kb/s and fair video in less. The ffmpeg software package can encode video and generate low data rates mpeg transport streams. Using ffmpeg requires a complex set of command line options that must be tuned to get the best quality. For example the following developed by Rob, M0DTS takes input from OBS and uses an Nvidia graphics card to generate a transport stream for a Pluto running Evariste F5OEO's firmware:

ffmpeg -f dshow -i video="OBS-Camera" -vcodec hevc_nvenc -g 8 -s 213x120 -bf 0 -pix_fmt yuv420p -b:v 10k -bufsize 30k -r 2 -preset fast -profile:v main -rc cbr_hq -rc-lookahead 5 -an -f mpegts -streamid 0:256 -metadata service_provider="YourCall" -metadata service_name="YourName" -max_delay 2500000 -pcr_period 80 -pat_period 0.4 "udp://192.168.2.1:8282?pkt_size=1316"

This is pretty complex and breaking this down is out of scope and might reveal many liberties being taken but it did actually work. Here is an example received trans-atlantic using SDRAngel.

[[File:SDRAngel1.jpg|400px]]

The above parameters need to be tweaked for each required but rate, which will depend on the transmissions bandwidth, modulation and forward error correction.

BATC Wiki

2026-07-16T08:40:39Z

G8LCE: /* BATC projects */

'''Welcome to the British Amateur Television Club Wiki''' - the place to find information on all Amateur Television related equipment and projects. For details on how to join the BATC, the member's shop and CQ-TV archive and download visit the BATC website https://batc.org.uk/

This is your site, developed by the BATC for use by the worldwide ATV community - any information which you feel is of use to others can be put on the Wiki but editing accounts are only available to trusted members. Please get in touch with any member of the BATC Committee if you have something of interest to post. Please do not request an account before contacting a member of the BATC Committee; requests without pre-approval are ignored.

* New to Amateur TV - Get the basics on our [[Getting Started|Getting Started page]]

* For details on the Portsdown DATV transmit and receive system go to [[The Portsdown DATV transceiver system|the Portsdown pages]]

* For information on the MiniTiouner USB DATV receiver go to [[MiniTioune|MiniTiouner]]

* For the DATV equipment capability list go to [[DATV equipment capability|https://wiki.batc.org.uk/DATV_equipment_capability]]

== Contents ==
* [[Registering]] on the BATC wiki

== New to Amateur TV? ==
* Get the basics on our [[Getting Started|Getting Started page]]

==BATC Information and services==
* [[Joining the BATC]]

* [[Renewing your membership]]

* The [[BATC Privacy statement and data protection policy]]

* The [[BATC forum]]

* The [[BATC shop]]

* The [[The_new_streamer|BATC streamer]]

* The [[BATC archive]] Collection of photos and documents from BATC's past

* The [[new BATC website|BATC website]]

== BATC projects ==
* [[The Portsdown Transmitter]] - the BATC's Raspberry Pi-based DATV Transmitter
* [[MiniTioune]] - the DATV DVB-S / S2 receiver project
* [[Ryde Receiver]] - Dedicated DATV set top box project
* [[Knucker]] - Variable bandwidth DVB-T project
* [[Advanced receiver hardware]] - Details of the BATC advanced receiver hardware.
* [[WinterHill Receiver Project]] - Multi-channel DVB-S / S2 project
* [[BATC Video Source]] - The Raspberry Pi-based composite video source described in CQ-TV 270
* [[BATC HDMI Source]] - The Raspberry Pi-based HDMI video source to be described in CQ-TV 280
* [[Digilite]] - The original home build DATV construction project
* [[Repeater Controller]] - The BATC ATV Repeater Controller using a Raspberry Pi 4
* [[ARISS Digital Communication System]]
* [[PicoTuner]] - A USB tuner for DATV using the RpiPico as the USB interface
* [[Lynx RPi5 Dual RX]] - Lynx dual-channel Pi5 DATV Receiver project with Magic Eye tuning indicator and web console

== CQ-TV Magazine ==
* [[Index of articles]]
* [[Archive edition|Archive editions]] download
* [[BATC_Software_Library]] for project downloads

==BATC Event Streaming Equipment==
* [[Equipment Description]]

== BATC Conventions ==

Presentations from previous conventions can be found on this page [[BATC Conventions]]

==National and International Events==

* [[ HAM RADIO 2018 ]] ATV Presentations from HAM RADIO 2018 at Friedrichhsafen.

* [[ HAM RADIO 2019 ]] ATV Presentations from HAM RADIO 2019 at Friedrichshafen.

* [[ HAM RADIO 2022 ]] ATV Presentations from HAM RADIO 2022 at Friedrichshafen.

* [[ RSGB Convention 2022 ]] ATV Presentation at the 2022 RSGB Convention 2022

* [[ HAM RADIO 2023 ]] ATV Presentations from HAM RADIO 2023 at Friedrichshafen.

* [[ EMFcamp 2024 ]] BATC / AMSAT-UK / UKuG demonstration village at EMFcamp 2024.

* [[ HAM RADIO 2024 ]] ATV Presentations from HAM RADIO 2024 at Friedrichshafen.

* [[ HAM RADIO 2025 ]] ATV Presentations from HAM RADIO 2025 at Friedrichshafen.

==HAMTV on the ISS==

[[HAMTV from the ISS|HAMTV - 2.4GHz Digital Amateur Television (DATV) on the International Space Station (ISS)]]

== Getting on the air with ATV ==
===The ATV bands===
* [[29 MHz]]
* [[51 MHz]]
* [[71 MHz]]
* [[146 MHz RB-TV]]
* [[70cms Analogue TV]]
* [[70cm DATV]]
* [[23cms ATV]]
* [[13cms]]
* [[3.4 GHz DATV]]
* [[5.6 GHz]]
* [[10 GHz]]
* [[:Media:ATV on 5.6 10 and 24 Ghz.pdf|April 2018 Presentation to MMRT about ATV on 5.6 10 and 24 GHz]]

===The different ATV modes===
* [[Reduced bandwidth TV]] (RB-TV)
* [[The Effect of FEC]]

===Equipment Options===
* [[DATV transmitting Equipment]]

==Advanced encoding / input options==

Details of advanced transmission configurations, primarily for H265,and video production software.

* [[Feeding Video to Portsdown from vMix|Vmix output in to Portsdown IPTS input]]
* [[OBS - Open Broadcast Studio|OBS output in to Portsdown IPTS input]]
* [[Using GTX10xx Graphics card encoder with OBS]]
* [[Custom_DATV_Firmware_for_the_Pluto|Using the Pluto for DATV]]
* [[Jetson_Nano|Using the Jetson Nano with Portsdown]]

== Operating ==
* [[DATV equipment capability]] - Wiki page documenting the capabilities of common DATV transmit and receive equipment.
* [[ATV standards]] - a list of standards used by ATV operators including FM bandwidths, DATV PIDs, symbol rates and FEC
* [[EMF Compliance]] - information about EMF compliance for ATV and Microwave Operation
* [[Directory of portable sites]] suitable for ATV and microwave operation
* [https://www.google.com/maps/d/u/0/edit?mid=1VeLnRRbLwloDTL2i9-HE2sxqL0c&ll=52.95536632179757%2C-0.49709419999999227&z=7 Google map] showing possible portable operating sites
* [[Mapping tools]] including finding the QRA locator of a site, UK postcode to Lat and Long conversion and a topographic overlay for Google maps
* [[Propagation tools]]
* [[UK ATV DX Records]] - a list of Known DX Records for the UK
* [[2026 Activity Weekends]]
* [[2026 Activity Ladders]]
* [[Christmas 2025 Repeater Contest & Activity Ladder|Christmas 2025 repeater Contest & Activity Ladder]]
* [[IARU ATV contest]] - How to enter the annual international TV contest
* [[IARU Region 1 ATV Contest 2025 International Results]] - International Results for the June 2025 IARU Contest

==ATV repeaters==
* [[ATV Repeater Map]]
* [[UK ATV repeaters]]
* [[USA ATV repeaters]]
* [[Australian TV repeaters]]

* [[Technical topics for ATV repeater builders]]

==Es'hail-2==
* [[Es'hail-2 Basic Information|Getting started, LNBs and aligning a dish]]

* [[Es'hail-2 Ground Station|Es'hail-2 BATC WebSDR & DATV Spectrum Monitor]]

* [[Es'hail-2 DATV Bandplan]]

* [[Es'hail-2_LNBs_and_Antennaes|Es'hail-2_LNBs]]

* [[Transmitting_Oscar_100_DATV_signals|Es'hail-2 Transmitters]]

* [[Es'hail-2 Antennaes]]

* [[Es'hail-2 conference transmissions]]

==ATV projects==
* [[Adalm Pluto]] - Collection of information on using the Adalm Pluto for DATV
* [[The MacGuffin Project]] - Collection of tools used to create an automated multi-band ATV system
* [[Receiver upconverters]] - Details of upconverters to receive 146 and 437 MHz on STB and MiniTioune
* [[Jetson Nano]] - Third generation computer-based DATV Transmitter
* [[DTX1 TS]] - interface board to take in TS streams to the DTX1
* [[RpiDATV]] - software for the Rpi
* [[RBTVMOD]] - variable rate RB-TV mdulator for the Rpi
* [[DATVExpress]] - SDR hardware based DATV transmitter covering 70 - 2450 MHz
* [[PE43703 2025]] - PE43703 variable attenuator project 2025 version
* [[PE4302]] - PE4302 variable attenuator project
* [[ADF435x PIC]] - PIC controllers for Chinese ADF4350/4351 boards
* [[DigiTwist]] - an experimental 2 axis satellite tracker
* [[G4WIM PA controller]] - an advanced PA controller design by G4WIM published in CQ-TV 265
* [[WinterHill Receiver Project]]
* [[Tilt-O-Matic]] Pan and tilt head for surveyor tripods
* [[Gerber Files]] Index of Gerber (PCB) files used by BATC and Members' Projects

== Deutschsprachiges Wiki ==

* Portsdown DATV Projekt - Deutschsprachiges Wiki
* Minitioune(r) - Deutschsprachiges Wiki

== Useful Circuits and notes ==
* [[Antenna changeover relays]] - Notes on suitable antenna change over relays for ATV use.
* [[Filters]] - Collection of links and designs for that most critical but over looked component!
* [[Pre-amps]] - Notes, suppliers and circuits of pre-amplifiers suitable for ATV
* [[Power amplifiers]] - Notes, suppliers and circuits of power amplifiers suitable for ATV
* [[Video circuits]] - Notes and circuits for video processing
* [[Satellite receiver tuning offsets]] - Note on how to set up a satellite receiver to directly receive L band signals.
* [[Using ex-satellite dishes]] - Notes on how to find the feed point of a dish and designs for feeds to use

== ATV Equipment manuals and schematics ==
* [[Bob Platts G8OZP]] Circuits and documentation for the Bob Platts range of equipment
* [[Comtech module]] - 23cms and 13cms ATV Tx and Rx circuits and guides
* [[Solent ATV units]] - Tx and Rx circuits and information
* [[Wood & Douglas FM TV equipment]] - Circuits, pcb layouts and information
* [[LMW Electronics]] - Circuits, pcb layouts and information
* [[Fortop]] - Circuits, pcb layouts and information
* [[Glencom]] - VC-510 VHF to L band up converter circuit diagram and modifications
* [[Global communications]] - Hand drawn circuit of tuneable 70 / 140 MHz to L band block up converter
* [[Jaybeam]] - Details of many Jaybeam aerials

== Ex commercial broadcast equipment manuals ==
* [[NDS System 3000]]
* [[NDS Alteia rx]]

== Test equipment Information ==
For HP and Agilent equipment see the io group discussion at [https://groups.io/g/HP-Agilent-Keysight-equipment]

== Other equipment information related to ATV ==

GB3NQ

2024-11-07T10:15:44Z

G8LCE:

<div align="center">
GB3NQ 

The ATV Repeater NoV Holder is Kevin Francks M0BFB. 
</div>
 
Stations transmit digital pictures on 2m, 70cm and 2m and receive television pictures using the 23cm band.
 
Stations using GB3NQ may use relatively cheap 23cm transmitters and receivers using one of the Portsdown or Minitioune/Ryde projects available from the BATC (British Amateur Television Club) or suitable HD DVBS-2 satellite set top boxes -check suitability before purchase. https://batc.org.uk/
 
The input frequency is 146.5 Mhz, 437Mhz and 1249 MHz and H265 HD output on 1316 MHz with a SR 2000k and an FEC 4/5 DVBS-2.There is also a second output on 1318MHz with a SR 333k. Although GB3NQ has audio through, stations often use talkback on the 2 metre frequency of 144.750 MHz or via GB3NC repeater on 145.725Mhz.
 
The new digital repeater electronics were constructed by Paul G6MNJ and Keith G0KTD using British Amateur Television Clubs Portsdown transmitter and 3 Ryde receivers
all based around a Raspberry Pi 4. Further work is progressing - updating the control logic to use a Pico, new 8 way HDMI switch and a LinkPi encoder
 
A 150 watt power amplifier is driven by a 18 watt pre amplifier, both run considerably under power to remain linear - a must for digital ATV.
 
GB3NQ runs in Beacon mode between Mid day and 9Pm when it plays out a video for 30 minutes. When running between 10am and 10pm (10am to 10pm weekends and midday to 10pm in the week) it may be accessed at any time with a s valid digital television signal on 2m, 70cm or 23cm.This would be a symbol rate of 333Ksymbols/s on 2m or on 70cm and 23cm symbol rates of 333, 1000 or 2000 Ks/s.
 
The repeater transmits H265 HD on 1316MHz 2000Ks/s FEC 4/5 DVBS-2.
 
GB3NQ was originally constructed by two local amateurs. Maurice G3WKF and John G0VDU. Maurice, a mechanical engineer, made the high quality filters for the input and output of the repeater and also the 4 faced lantern antennas required for the transmitter and receiver which are still in use today.
 
GB3NQ can be live streamed by using the link below
https://batc.org.uk/live/gb3nq

Using the Ryde software alongside Portsdown

2024-11-06T15:53:43Z

G8LCE:

It is possible to load the Ryde software alongside the Portsdown 4 Software. This facility is primarily intended to support the use of web-controlled Portsdowns with no touchscreens that are driving an HDMI display, but can also be used to display the received picture on the touchscreen. The Ryde can then be tuned for QO-100 using M0DTS's excellent QuickTune software on a Windows PC.

To set up the Ryde software, go to Menu 2, File Menu, and select "Install Ryde RX". The install will take 5 to 10 minutes and the Portsdown will reboot back to Menu 1 when the install is complete.

To start the Ryde software, connect a tuner and select Menu 2, "Ryde Receiver". The Ryde software will run until the touchscrren (or web control) is touched and then Portsdown software will restart.

Control of the Ryde software will require the use of QuickTune or a similar application. An IR sensor could be installed and a remote control used, or the /home/pi/ryde/config.yaml file could be manually edited to achieve the desired start-up settings.

The audio output destination can be selected from Menu 3, and is set to the same as the internal Portsdown receiver.

The video output resolution will be 800*480 @ 60fps like the Portsdown screen.

If using the Portsdown 'Ryde' and you need to set the frequency etc. manually use Putty to log on to the RPi.
Then

sudo nano /home/pi/ryde/config.yaml

Select the preset you want to start with (note they are labelled 01,02,03 etc.) and set up the parameters you want.
Then move further down to where it says 'default: *preset01'and alter the 01 to the preset number you want.
Write Out and Exit then Menu and select Reboot.

You can also edit the audio level if you look further down the config:

audio:
muteOnStartup: False
volumeOnStartup: 60
volumeStep: 10
enableMenu: False

Note that MAX = 99

Using the Ryde software alongside Portsdown

2024-11-06T15:19:14Z

G8LCE:

Using the Ryde software alongside Portsdown

2024-10-31T08:22:52Z

G8LCE:

Using the Ryde software alongside Portsdown

2024-10-30T14:48:28Z

G8LCE:

It is possible to load the Ryde software alongside the Portsdown 4 Software. This facility is primarily intended to support the use of web-controlled Portsdowns with no touchscreens that are driving an HDMI display, but can also be used to display the received picture on the touchscreen. The Ryde can then be tuned for QO-100 using M0DTS's excellent QuickTune software on a Windows PC.

To set up the Ryde software, go to Menu 2, File Menu, and select "Install Ryde RX". The install will take 5 to 10 minutes and the Portsdown will reboot back to Menu 1 when the install is complete.

To start the Ryde software, connect a tuner and select Menu 2, "Ryde Receiver". The Ryde software will run until the touchscrren (or web control) is touched and then Portsdown software will restart.

Control of the Ryde software will require the use of QuickTune or a similar application. An IR sensor could be installed and a remote control used, or the /home/pi/ryde/config.yaml file could be manually edited to achieve the desired start-up settings.

The audio output destination can be selected from Menu 3, and is set to the same as the internal Portsdown receiver.

The video output resolution will be 800*480 @ 60fps like the Portsdown screen.

If using the Portsdown 'Ryde' and you need to set the frequency etc. manually use Putty to log on to the RPi.
Then

sudo nano /home/pi/ryde/config.yaml

Select the preset you want to start with (note they are labelled 01,02,03 etc.) and set up the parameters you want.
Then move further down to where it says 'default: *preset09'and alter the 09 to the preset number you want.
Write Out and Exit then Menu and select Reboot.

Using the Ryde software alongside Portsdown

2024-10-30T14:47:41Z

G8LCE:

It is possible to load the Ryde software alongside the Portsdown 4 Software. This facility is primarily intended to support the use of web-controlled Portsdowns with no touchscreens that are driving an HDMI display, but can also be used to display the received picture on the touchscreen. The Ryde can then be tuned for QO-100 using M0DTS's excellent QuickTune software on a Windows PC.

To set up the Ryde software, go to Menu 2, File Menu, and select "Install Ryde RX". The install will take 5 to 10 minutes and the Portsdown will reboot back to Menu 1 when the install is complete.

To start the Ryde software, connect a tuner and select Menu 2, "Ryde Receiver". The Ryde software will run until the touchscrren (or web control) is touched and then Portsdown software will restart.

Control of the Ryde software will require the use of QuickTune or a similar application. An IR sensor could be installed and a remote control used, or the /home/pi/ryde/config.yaml file could be manually edited to achieve the desired start-up settings.

The audio output destination can be selected from Menu 3, and is set to the same as the internal Portsdown receiver.

The video output resolution will be 800*480 @ 60fps like the Portsdown screen.

If using the Portsdown 'Ryde' and you need to set the frequency etc. manually use Putty to log on to the RPi.
Then
sudo nano /home/pi/ryde/config.yaml

Select the preset you want to start with (note they are labelled 01,02,03 etc.) and set up the parameters you want.
Then move further down to where it says 'default: *preset09'and alter the 09 to the preset number you want.
Write Out and Exit then Menu and select Reboot.

GB3NQ

2024-10-05T10:22:29Z

G8LCE:

<div align="center">
GB3NQ 

The ATV Repeater NoV Holder is Kevin Francks M0BFB. 
</div>
 
Stations transmit digital pictures on 2m, 70cm and 2m and receive television pictures using the 23cm band.
 
Stations using GB3NQ may use relatively cheap 23cm transmitters and receivers using one of the Portsdown or Minitioune/Ryde projects available from the BATC (British Amateur Television Club) or suitable HD DVBS-2 satellite set top boxes -check suitability before purchase. https://batc.org.uk/
 
The input frequency is 146.5 Mhz, 437Mhz and 1249 MHz and H265 HD output on 1316 MHz with a SR 2000k and an FEC 4/5 DVBS-2.There is also a second output on 1318MHz with a SR 333k. Although GB3NQ has audio through, stations often use talkback on the 2 metre frequency of 144.750 MHz or via GB3NC repeater on 145.725Mhz.
 
The new digital repeater electronics were constructed by Paul G6MNJ and Keith G0KTD using British Amateur Television Clubs Portsdown transmitter and 3 Ryde receivers all based around a Raspberry Pi 4. Further work is progressing - updating the control logic to use a Pico and a LinkPi encoder
 
A 150 watt power amplifier is driven by a 18 watt pre amplifier, both run considerably under power to remain linear - a must for digital ATV.
 
GB3NQ runs in Beacon mode between Mid day and 9Pm when it plays out a video for 30 minutes. When running between 10am and 10pm (10am to 10pm weekends and midday to 10pm in the week) it may be accessed at any time with a s valid digital television signal on 2m, 70cm or 23cm.This would be a symbol rate of 333Ksymbols/s on 2m or on 70cm and 23cm symbol rates of 333, 1000 or 2000 Ks/s.
 
The repeater transmits H265 HD on 1316MHz 2000Ks/s FEC 4/5 DVBS-2.
 
GB3NQ was originally constructed by two local amateurs. Maurice G3WKF and John G0VDU. Maurice, a mechanical engineer, made the high quality filters for the input and output of the repeater and also the 4 faced lantern antennas required for the transmitter and receiver which are still in use today.
 
GB3NQ can be live streamed by using the link below
https://batc.org.uk/live/gb3nq

GB3NQ

2024-09-05T07:56:49Z

G8LCE:

<div align="center">
GB3NQ 

The ATV Repeater NoV Holder is Kevin Francks M0BFB. 
</div>
 
Stations transmit digital pictures on 2m, 70cm and 2m and receive television pictures using the 23cm band.
 
Stations using GB3NQ may use relatively cheap 23cm transmitters and receivers using one of the Portsdown or Minitioune/Ryde projects available from the BATC (British Amateur Television Club) or suitable HD DVBS-2 satellite set top boxes -check suitability before purchase. https://batc.org.uk/
 
The input frequency is 146.5 Mhz, 437Mhz and 1249 MHz and H265 HD output on 1316 MHz with a SR 2000k and an FEC 4/5 DVBS-2.There is also a second output on 1318MHz with a SR 333k. Although GB3NQ has audio through, stations often use talkback on the 2 metre frequency of 144.750 MHz or via GB3NC repeater on 145.725Mhz.
 
The new digital repeater electronics were constructed by Paul G6MNJ and Keith G0KTD using British Amateur Television Clubs Portsdown transmitter and 3 Ryde receivers all based around a Raspberry Pi 4.
 
A 150 watt power amplifier is driven by a 18 watt pre amplifier, both run considerably under power to remain linear - a must for digital ATV.
 
GB3NQ runs in Beacon mode between Mid day and 9Pm when it plays out a video for 30 minutes. When running between 10am and 10pm (10am to 10pm weekends and midday to 10pm in the week) it may be accessed at any time with a s valid digital television signal on 2m, 70cm or 23cm.This would be a symbol rate of 333Ksymbols/s on 2m or on 70cm and 23cm symbol rates of 333, 1000 or 2000 Ks/s.
 
The repeater transmits H265 HD on 1316MHz 2000Ks/s FEC 4/5 DVBS-2.
 
GB3NQ was originally constructed by two local amateurs. Maurice G3WKF and John G0VDU. Maurice, a mechanical engineer, made the high quality filters for the input and output of the repeater and also the 4 faced lantern antennas required for the transmitter and receiver which are still in use today.
 
GB3NQ can be live streamed by using the link below
https://batc.org.uk/live/gb3nq

GB3NQ

2024-09-05T07:54:25Z

G8LCE:

<div align="center">
GB3NQ 

The ATV Repeater NoV Holder is Kevin Francks M0BFB. 
</div>
 
Stations transmit digital pictures on 2m, 70cm and 2m and receive television pictures using the 23cm band.
 
Stations using GB3NQ may use relatively cheap 23cm transmitters and receivers using one of the Portsdown or Minitioune/Ryde projects available from the BATC (British Amateur Television Club) or suitable DVBS-2 satellite set top boxes -check suitability before purchase. https://batc.org.uk/
 
The input frequency is 146.5 Mhz, 437Mhz and 1249 MHz and H265 output on 1316 MHz with a SR 2000k and an FEC 4/5 DVBS-2.There is also a second output on 1318MHz with a SR 333k. Although GB3NQ has audio through, stations often use talkback on the 2 metre frequency of 144.750 MHz or via GB3NC repeater on 145.725Mhz.
 
The new digital repeater electronics were constructed by Paul G6MNJ and Keith G0KTD using British Amateur Television Clubs Portsdown transmitter and 3 Ryde receivers all based around a Raspberry Pi 4.
 
A 150 watt power amplifier is driven by a 18 watt pre amplifier, both run considerably under power to remain linear - a must for digital ATV.
 
GB3NQ runs in Beacon mode between Mid day and 9Pm when it plays out a video for 30 minutes. When running between 10am and 10pm (10am to 10pm weekends and midday to 10pm in the week) it may be accessed at any time with a s valid digital television signal on 2m, 70cm or 23cm.This would be a symbol rate of 333Ksymbols/s on 2m or on 70cm and 23cm symbol rates of 333, 1000 or 2000 Ks/s.
 
The repeater transmits H265 on 1316MHz 2000Ks/s FEC 4/5 DVBS-2.
 
GB3NQ was originally constructed by two local amateurs. Maurice G3WKF and John G0VDU. Maurice, a mechanical engineer, made the high quality filters for the input and output of the repeater and also the 4 faced lantern antennas required for the transmitter and receiver which are still in use today.
 
GB3NQ can be live streamed by using the link below
https://batc.org.uk/live/gb3nq

GB3NQ

2024-09-05T07:52:34Z

G8LCE:

<div align="center">
GB3NQ 

The ATV Repeater NoV Holder is Kevin Francks M0BFB. 
</div>
 
Stations transmit digital pictures on 2m, 70cm and 2m and receive television pictures using the 23cm band.
 
Stations using GB3NQ may use relatively cheap 23cm transmitters and receivers using one of the Portsdown or Minitioune/Ryde projects available from the BATC (British Amateur Television Club) or suitable DVBS-2 satellite set top boxes -check suitability before purchase. https://batc.org.uk/
 
The input frequency is 146.5 Mhz, 437Mhz and 1249 MHz and H265 output on 1316 MHz with a SR 2000k and an FEC 4/5 DVBS-2.There is also a second output on 1318MHz with a SR 333k. Although GB3NQ has audio through, stations often use talkback on the 2 metre frequency of 144.750 MHz or via GB3NC repeater on 145.725Mhz.
 
The new digital repeater electronics were constructed by Paul G6MNJ and Keith G0KTD using British Amateur Television Clubs Portsdown transmitter and 3 Ryde receivers all based around a Raspberry Pi 4.
 
A 150 watt power amplifier is driven by a 18 watt pre amplifier, both run considerably under power to remain linear - a must for digital ATV.
 
GB3NQ runs in Beacon mode between Mid day and 9Pm when it plays out a video for 30 minutes. When running between 10am and 10pm (10am to 10pm weekends and midday to 10pm in the week) it may be accessed at any time with a s valid digital television signal on 2m, 70cm or 23cm.This would be a symbol rate of 333Ksymbols/s on 2m or on 70cm and 23cm symbol rates of 333, 1000 or 2000 Ks/s.
 
The repeater transmits on 1316MHz 2000Ks/s FEC 4/5 DVBS-2.
 
GB3NQ was originally constructed by two local amateurs. Maurice G3WKF and John G0VDU. Maurice, a mechanical engineer, made the high quality filters for the input and output of the repeater and also the 4 faced lantern antennas required for the transmitter and receiver which are still in use today.
 
GB3NQ can be live streamed by using the link below
https://batc.org.uk/live/gb3nq

GB3NQ

2024-09-05T07:47:09Z

G8LCE:

<div align="center">
GB3NQ 

The ATV Repeater NoV Holder is Kevin Francks M0BFB. 
</div>
 
Stations transmit digital pictures on 2m, 70cm and 2m and receive television pictures using the 23cm band.
 
Stations using GB3NQ may use relatively cheap 23cm transmitters and receivers using one of the Portsdown or Minitioune/Ryde projects available from the BATC (British Amateur Television Club) or suitable DVBS-2 satellite set top boxes -check suitability before purchase. https://batc.org.uk/
 
The input frequency is 146.5 Mhz, 437Mhz and 1249 MHz and the output 1316 MHz with a symbol rate of 2000 and an FEC 4/5 DVBS-2. Although GB3NQ has audio through, stations often use talkback on the 2 metre frequency of 144.750 MHz or via GB3NC repeater on 145.725Mhz.
 
The new digital repeater electronics were constructed by Paul G6MNJ and Keith G0KTD using British Amateur Television Clubs Portsdown transmitter and 3 Ryde receivers all based around a Raspberry Pi 4.
 
A 150 watt power amplifier is driven by a 18 watt pre amplifier, both run considerably under power to remain linear - a must for digital ATV.
 
GB3NQ runs in Beacon mode between Mid day and 9Pm when it plays out a video for 30 minutes. When running between 10am and 10pm (10am to 10pm weekends and midday to 10pm in the week) it may be accessed at any time with a s valid digital television signal on 2m, 70cm or 23cm.This would be a symbol rate of 333Ksymbols/s on 2m or on 70cm and 23cm symbol rates of 333, 1000 or 2000 Ks/s.
 
The repeater transmits on 1316MHz 2000Ks/s FEC 4/5 DVBS-2.
 
GB3NQ was originally constructed by two local amateurs. Maurice G3WKF and John G0VDU. Maurice, a mechanical engineer, made the high quality filters for the input and output of the repeater and also the 4 faced lantern antennas required for the transmitter and receiver which are still in use today.
 
GB3NQ can be live streamed by using the link below
https://batc.org.uk/live/gb3nq