The SDR Radio blog, articles about the software development
July 26th, 2026 Reuter RSR200B Added initial support. Fobos Finalised support for Fobos SDR, only the Agile firmware is supported. Some early Fobos SDR units had HF2 and HF1 swapped on the case printing. FFT When using NVIDIA CUDA for the FFT the returned buffers now use memory from the heap rather than pinned memory (*). Reduced the CPU load in the FFT Helper DLL. The data from the FFT (CUDA,…
SDR Television v1.1.3 User Interface Fixed erroneous cursor flicker in Settings help text and Receive, Transmit panes. Fixed error in the spectrum squelch logic. Minor fix/improvement in QPSK LUT lookup for low values. Receiver Use highest possible quality decimation for symbol rates of 333ksps and lower. Added optional Doppler correction for LEO/MEO satellites such as MARMOTsat (July 2026). This…
SDR Television v1.1.2 June 12th, 2026: Add option to disable audio, thus making more bits available for video, this is for use in DATV contests. Note: 66 ksps sample rate is still experimental, will be improved. Downloads are at the bottom of this page. SDR Television v1.1.1 June 9th, 2026: Fixes a fatal bug in the Settings, Camera page. SDR Television v1.1 May 18th, 2026: This is the official…
SDR Television v1.1.1 June 9th, 2026: Fixes a fatal bug in the Settings, Camera page. Downloads are at the bottom of this page. SDR Television v1.1 May 18th, 2026: This is the official v1.1 release , code exactly the same as 1.0.16 which has survived testing for a few weeks. Lots of improvements since the last official kit. As with any software project, there's always room for improvements and new…
Version 1.6.2 This release fixes two bugs in the new DX Spot feature. The spot age logic incorrectly affected spot display. When the map was zoomed, station markers off the map would be displayed at the top left (0, 0). Downloads are on the World Map page . Version 1.6.1 This release fixes two fatal bugs in the new DX Spot feature. When the graphics engine is restarted, resources are correctly…
Version 1.6.1 This release fixes two fatal bugs in the new DX Spot feature. When the graphics engine is restarted, resources are correctly released. Fixed a resource leak when processing the MoseMove logic. Downloads are on the World Map page . Version 1.6 This release adds the display of DX Spots. Display spots are submitted to PSK Reporter which in turn are relayed by a MQTT Broker running on a…
Version 1.6 This release adds the display of DX Spots. Display spots are submitted to PSK Reporter which in turn are relayed by a MQTT Broker running on a high performance Akamia node. Spot Format Each spot consists of these fields: Sequence Frequency Band Mode Signal level Time stamp Sending station call, square, country Receiving station call, square, country Note: The country is the ADIF…
SDR Television v1.1 May 18th, 2026: This is the official v1.1 release , code exactly the same as 1.0.16 which has survived testing for a few weeks. Lots of improvements since the last official kit. As with any software project, there's always room for improvements and new features, but for now here's a stable solution which works well with the QO-100 satellite. Many thanks to Sigi and the DATV…
SDR Television v1.0.14 April 12th, 2026: A new kit, lots of improvements since the last official kit. As with any software project, there's always room for improvements and new features, but for now here's a stable solution which works well with the QO-100 satellite. Many thanks to Sigi and the DATV test team. Downloads are at the bottom of this page. To Do The items below may be completed for the…
SDR Television v1.0.9 March 13th, 2026: A new kit, lots of receive improvements since the last official kit. As with any software project, there's always room for improvements and new features, but for now here's a stable solution which works well with the QO-100 satellite. Many thanks to the DATV test team. Downloads are at the bottom of this page. To Do The items below will be completed for the…
First Impressions The RSR200 is a high performance black box receiver (“SDR”) for direct digitization of RF signals up to above 250 MHz and feeding SDR programs on PCs with data rates up to 90 MS/s (16 bit I/Q, lower rates with 24 bit resolution). Source https://www.reuter-elektronik.com/html/rsr200.html . Above is an image of SDR Console using a RSR200B at 15 MHz bandwidth, antenna is an 8…
SDR Television v1.0.6 February 13th, 2026: A new kit, lots of receive improvements since the last official kit. As with any software project, there's always room for improvements and new features, but for now here's a stable solution which works well with the QO-100 satellite. Downloads are at the bottom of this page. Release Notes v1.0.6 Transmit A FIR filter at the end of the IQ generation…
February 10th, 2026 Pluto Correct the FIR filter definitions, this has improved reception. November 1st, 2025 Analyser Analyser tag window change, as suggested by Jim. Analyser tags now saved and restored correctly. Analyser font size now supports small, medium and large. Analyser loads saved projects faster. Saving project now much faster and uses less memory. More display lines available if you…
Follow These Steps If you're unsure how you add a radio definition to SDR Console, here are the steps you must follow. Start SDR Console (quite obvious really). From the Home tab on the ribbon bar, in the Radio panel click Select Radio , the Select Radio window is displayed. At the bottom right of the Select Radio window, click Definitions... , the Radio Definitions window is displayed. At the top…
Version 1.5.4 This release fixes a bug, improves the user interface. Download link is at the bottom of this page. Aurora Previously the JSON parser would close the program by raising an exception when the downloaded data was invalid. This behaviour was not intentional, as of this kit the program is not closed, instead an entry is added to the logfile explaining the problem. Corrected Clock Display…
November 1st, 2025 Analyser Analyser tag window change, as suggested by Jim. Analyser tags now saved and restored correctly. Analyser font size now supports small, medium and large. Analyser loads saved projects faster. Saving project now much faster and uses less memory. More display lines available if you have enough RAM: Less than 16GB then 50,000 lines. 16GB to 32GB then 100,000 lines. 32GB or…
SDR Television v1.0.1 October 29th, 2025: Fixed a fatal bug in the receive AGC if the output soundcard sample rate is 96kHz or 192kHz. Downloads are at the bottom of this page. SDR Television v1 September 10th, 2025: This release is actually beta 6 with a few small updates, so I've left the beta 6 text here. I hope to start working on this in November 2025, adding the Gardner timing error…
Previous: Version 1.5.2 This release fixes a bug, improves the user interface and adds a new calendar. Download link is at the bottom of this page. Sleep After resuming from computer sleep, the program would often lock up. This has been fixed (graphics restarted). Country Prefixes The database shipped with this kit is the very latest available from Log4OM , update timestamp is 2025-08-05…
And the award goes to... Me! For SDR Console's contribution to QO-100 and the new SDR Television software. Sadly I couldn't attend, so Mike G0MJW accepted on my behalf. I would like to thank all members of the AMSAT UK Academy, especially ...
Version 1.5.1 This is a mainly cosmetic update to version 1.5, nevertheless well worth installing. Appearance The Appearance window has been refreshed, simplified. The defaults have been changed to have a dark background and a light text. A HLS (Hues, Lightness, Saturation) colour editor has been added, selected from the colour-wheel button to the right to the main colour-selection options. The…
SDR Television This release is actually beta 6 with a few small updates, so I've left the beta 6 text here. I hope to start working on this in November 2025, adding the Gardner timing error detection which should improve the decoding with low SNR. Downloads are at the bottom of this page. About Gardner timing error detection Gardner timing error detection is a widely used technique in digital…
Hello Again I'm now back to 90% SDR Console support, so here's the first beta for at least eight months. Scroll to the bottom for a link to the beta kit. The source is fully archived, so crash dumps can be analysed. September 4th, 2025 Ad ded Simple-Radio-Control-Protocol (SR CP) as per JB's Dx Info and tested only with StationList. SRCP specifies a method to control a radio and get its status…
SDR Television Improved phase detection at the start of each frame (SOF, PLS) which in turn improves sensitivity. Added 2,000 ksps receive, confirmed as working with GB3NQ. Sensitivity still not as good as a Serit 4334 NIM as used in the MiniTioune receiver, what's missing is synchronisation timing, I will be using Gardner timing error detection (TED). This will be added in Q1, 2026 when this…
SDR Television Found and fixed an unused massive memory allocation (up to 10GB), may have caused systems to freeze. Fixed fatal bug in matched filter array allocation. Changed the default transmit bandpass shaping filter roll-off to 0.20 in transmit and receive. Please look at the images below and apply the change. SDR Pluto Now show the AGC gain and RSSI. Added Default link to select the…
Unexpected Beta #4 I wasn't planning to release another beta, but there was an error with a download link in the Blog post for Beta #3, also a few worthwhile improvements have been made, so here I go. SDR Television Improved matched filter (root-raised cosine). Changed LDPC algorithm to use the Offset-Min-Sum (self-corrected) layered schedule', constant factor = 2 . Fine tuned the receiver…
Major Change Scroll down to the SDR Radio information. The bandwidths available for SDR Television when using a Pluto / LibreSDR have changed. SDR Television Now supporting vMix, this was a bug in the DirectShow camera support. Diagnostics overlay now shows Symbol rate instead of Omega. Fixed a (stupid) bug when a LNB offset was enabled. Detects the version of SDR Console, install will fail if the…
BATC Net, May 22nd 2025 Here's a snippet from the British Amateur Television Club net on QO-100. I hope it doesn't scare you.
UI Refresh And More... After spending almost 18 months on the SDR Television project, Simon's World map has been given some attention. User Interface I find user interfaces (UI) difficult, I've never been much good at them. Here's what's changed: Ribbon Bar, Home panel: Now starts with the Home location configuration, this was previous found mixed up with the Centre buttons. Some centre icons…
After too much grief, I've decided to stop using Wi-Fi to connect the small NUC systems in the computer room to my network: DX Cluster (Ubuntu) SDR Server (Windows) User Forums (Windows) These servers are in constant use, causing the wireless transmitter on my TP-Link AX50 to fail. By switching over to a wired network there's less demand on the wireless transmitter and the whole network has become…
Inside All this equipment is installed in my computer room, next to the office. Some people mount on metal, I prefer wood, much easier! So, what do we see here? Early ADALM Pluto version A/B modified by Matthias, DD1US to support a 40MHz reference. Analog Devices CN0417 RF amplifier , powered by micro-USB, optimized to operate on 2400 MHz with 18dBm maximum output, gain of 20-21dB, an integrated…
SDR Television video from Australia This is the VK3RTV net from Tuesday 29th April 2025, an in-depth look at SDR Television by Joe VK3TET. It's always interesting to see what others think of my efforts, even when just a first beta release. Out friends 'down under' don't have access to QO-100, the next release of SDR Television will have a better UI for terrestrial use.
Sounds Like... And before I start, may I apologise for the delay in finding the cause of the noise. A month or two ago my public SDR servers were hit with some nasty noise. At first I thought it was builders next door who always leave tools plugged in. Then the complaints started... Yesterday (April 29th, 2025), with the help of Tim M0AFJ I located the source of the noise, it was coming from…
YouTube Many thanks to Tech Minds, aka Matt M0DQW for this very complimentary YouTube video. I hope you enjoy it as much as I did.
The first Major Update First of all, a big thank-you to everyone who has been trying the software, for the feedback and the help finding a very stupid bug which caused the "Encountered an improper argument" error. Don't worry - if you use QO-100 then I'll be watching you! At the bottom of this blog entry are new kits for both SDR Radio and SDR Television, but first here's what's been happening.…
Great For Images Use in SDR Software I wanted a startup image to display in SDR Television. While sites such as Deviantart.com have many, many different images, I decided none we what I wanted. A recent posting on the BATC website used Grok for repeater images, until I saw this post I had never heard of Grok! Here are the images I have created with Grok, the only limitation is my explaining to…
Post Date: April 21st, 2025 Updated: April 23rd, 2025 with new download links for SDR Television (scroll down) Overview This is the first publicly available kit for a project I've been working on for roughly 18 months. SDR Television is a DVB-S2 / AAC / H264 / H265 program for use on the QO-100 satellite. It uses many DLLs from SDR Console, mainly to control a Pluto / LibreSDR. Why? Why not? This…
16 MHz Bandwidth! Default Firmware Here you see a screenshot from SDR Television (work in progress) running the LibreSDR at 16MHz bandwidth. This is the standard firmware from Evariste, F5OEO who has done a great job. Compare 16MHz with LibreSDR to 5MHz with the PlutoSDR, a big difference! Many thanks to Mike, G0MJW for the screenshot. Overclocking Other firmware is available which overclocks the…
Microsoft admits bug that kills PC’s audio As reported on TechRadar , Microsoft has confirmed that Windows 11 has an audio bug (that we reported on yesterday), a glitch which can take out the PC’s sound completely, and it’s now clear that this affects multiple Windows versions. It's hit my development system, audio now always plays on a monitor's speakers, not my nice Edifier speakers through my…
After talking on QO-100 with Mike, G0MJW i've ordered a LibreSDR from AliExpress where it's known as "SDR AD9363 AD9361 ZYNQ7020 ADI Pluto communication experiment platform".
It's 2025, another new year.
Heated Mouse Mat If, like me you have cold hands then a heated mouse mat is essential. Before I bought this I had two options - either wear thin arthritis gloves or heat the room to a silly temperature. Anyway, this popped up on Facebook with an Amazon link, so I bought one. This now makes coding even more of a pleasure as not only are my hands warm, the heat also rises onto my face and head so…
Big Improvement! I recently upgraded the firmware on the Pluto I use for QO-100. Previously I was using v3.5, now v3.9 (the latest). An immediate improvement with DATV on the wideband transponder was seen - the MER (modulation error ratio) improved by up to 0.5 db due to better internal FIR filter design. Although 0.5dB may not seem like much, with DVB-S2 it really is! Better MER results in fewer…
50 Years A Member It came as a surprise to receive the letter below confirming I've been a member for 50 years! Seems like only yesterday. Membership of the RSGB is important - not only a great monthly magazine (Radcom) but also spectrum defence. Here's to the next 50 years.
Sad news Further to my previous post , this potentially excellent device can't be shipped to the UK, only Canada and the USA which is a tad odd as it's a Hong Kong project. Price is $899. For purchasing, just go to this page on Crowd Supply . Update December 20th 2024 From the developer: "Not my call. It's Crowd Supply cutting my CE. I am doing the CE. It will he a week". Update December 21st 2024…
An Up-Market Pluto? Copyright note: images from CrowdSupply . I don't own any of them. This looks like it could be a decent solution for QO-100, offering more bandwidth than the standard ADALM-Pluto. I think the maximum bandwidth quoted as being 85kHz is wrong, surely it'll be 85MHz? Project home page is here .
Pluto Temperatures October 7th, 2024 Manfred (DC2MH) contacted me recently with a question about the Pluto FPGA temperature display. Using scripts from Analog Devices the display is 20°C higher, so there's possibly an error in SDR Console. It only took a few minutes to find the problem - during early Pluto support I had added a fixed 20°C to reduce the displayed FPGA temperature to a value similar…
DATV Update, December 17th 2024 So, here's an update on my DATV project . This is a pure software solution for DATV (DVB-S2) which can be used with Pluto, Lime (later) and other SDRs. No extra hardware such as the BATC MiniTiouner is needed. Summary Good progress is being made: CPU load is low, see Task Manager screenshot below, CPU is i5-13600F at only 2.7%. Low CPU is important for this type of…
Netflix Intelligence If you watch the Netflix series Intelligence, Season 1 Episode 4 you see some code on the screen when there's 13 minutes and 24 seconds remaining of the episode.. Looks like the NSA have swiped this code from Bhavesh Jaswani who is from Udaipur, Rajasthan. Or maybe he hacked into the NSA and 'copied' the code? Anyway, it's not super-efficient. The original code is below.…
Using a local transmitter? If you use a local transmitter which overloads your SDR then consider the Wideband Auto-Mute. This mutes the SDR IQ input as soon as anpower threshold is exceeded, so there will not be unpleasant sounds from the speakers - or worse headphones! From the Ribbon bar, Home, Wideband DSP select Auto-mute. The Auto-Mute option mutes the audio and blanks the waterfall when a…
Forums SSL Certificate Let’s dive into the SSL certificate in a way that’s easy to understand. An SSL certificate, which stands for Secure Sockets Layer , is essentially a digital padlock. It creates a secure connection between a web server and a browser, ensuring that any data exchanged between the two remains private and secure. For a website like SDR-Radio.com Ltd., where you aim to provide…