SDR Console V3: Signal History and six RX Panes!


NEW: The Receivers’ Pane on top covers spectrum and spectrogram of up to six demodulators – look at different modes and bandwidths. Also new: “Signal History” at the bottom.

Simon Brown, G4ELI, has further developed his software SDR Console which has become THE platform for a real bunch of very different SDRs. The new public preview has two more exciting features:

  • “Signal History” takes the signal strength of the given bandwidth each 50 milliseconds, which can be saved in a CSV file. It is also shown in three different speeds on a display.
  • “Receivers’ Pane” shows up to six combos of spectrum/spectrogram of the complete up to 24 parallel demodulators (they additionally can be shown in the Matrix, as in former versions).

See screenshot on at the top.

“Signal History” offers many applications, to name just three:

  • analyze fading and its structure with an unsurpassed time resolution of 50 ms
  • document fade-in and fade out
  • measure signal-to-noise ratio of signals

As an First Aid, I have written a PDF of 19 pages with 36 instructive Figures. There you find a step-by-step introduction plus numerous example on how to use this valuable tool in practice. Please download it here. (Another tab opens, where you have to double-click “SDR_COM_Marker” to start download.)

Surely, I will come back to these most welcomed features in more detail. For now only some screenshot examples regarding “Signal History”, which have been realized by analyzing the CSV files with QtiPlot:

With some statistics applied on the CSV file of Signal History, you’ll get a deep inisght into fading structures. Top: original data (black), averaged (yellow), median (read line). Bottom: box diagram, histogram, 3D-band. See following screenshots for some examples.


… and this is just the beginning! [Receiver: Elad FDM-S2 & AirSpy with SpyVerter]


  • Hi Nils, thanks for another great writeup. How is the cpu usage with sdr console compared to other sdr control apps?



    • … thanks, Chris. “It depends”. SDR Console “as is” will run more or less like any other software. The more demodulators (RX) you activate, the more power is needed. It depends on CPU, RAM and clock frequency. With an i7 at 3.4 GHz and 64 GB RAM all works fine to the maximum of 24 demodulators. There’s even room left for a couple of decoders … 73 Nils, DK8OK

  • It happens only a very few times in lifetime, that you get an answer before you asked your question. Your reply on Chris’ question is one of these rare cases. I could imagine, that some broadcasters who believe in future of AM brodcasting could be intersted to use this software as well. Thanks for the great work, highly appreciated!

  • Pingback: SDR-Console V3 Latest Update: Signal History & Receiver Panes

  • Article and review written by DK8OK are truly valuable, I already have read his review on Hackrf, airspy-R2, FCD and now start reading about SDR-Consol. I like SDR-Consol but it take too much processing power to get utilise it’s full features, Is not possible for me to play a simple RTL-SDR stick with SDR-Console on Intel dual core processor with less cpu power. However, I assume SDR- Console may seem soon defeat SDR# in it’s versatile functionality.

    • … thanks, and to make full use of e.g. 10 MHz bandwidth & 24 demodulators, 24 VACs and 24 decoders/virtual recorders, you really need some power. But then you are playing in a truly near-professional league with a modest hardware investment. Let alone, the free software! If you have a look onto professional hardware and software, you will quickly realize what I mean. So, even if it is not really cheap for some people, it’s a real bargain for all the techniques it support. We never had so many possibilities … 73 Nils, DK8OK

  • I’ve done some testing using sdr console with an rsp2 and have the total cpu time down to 3 percent when the app is sent to task bar for digital mode decoding of three separate 3khz usb channels. The bandwidth is set to 500Khz and I’ve slowed the speed of the waterfall some, these are fairly important determiners of how much cpu time the app takes. This is on a c2q quad 2.4ghz sys with ati video card. Using sdruno on the same sys the cpu time was always at least 16 percent even with the app sent to taskbar. I’ve also noted a much more consistent experience with sdr console than the other sdr apps I’ve used, where sensitivity settings might change or be lost and other settings changed behind my back.

    Am building a new sys with a nvidia card to take advantage of cuda in the vid card, should reduce the cpu time even more as sdr console employs cuda processing if enabled.

    • Thanks, Chris – it is always good to collect some experiences in the wide file of PCs. To slow down waterfall AND reduce its resolution is quite a good idea. Goodluck with the new PC: Nils

  • Absolutely wonderful and useful program! But, what we really need is a program which is geared to using these receivers as test equipment – i.e. a true spectrum analyzer program complete with accurate and separate amplitude & frequency readouts, markers, delta functions, etc.

    The SDRPlay RSP-1 is a capable spectrum analyzer and can be used for testing purposes. I have used it with SDR# v1361 to make very accurate frequency and amplitude measurements, and also to plot filter bandwidths and to measure antenna return loss (i.e. SWR). But a properly featured program is needed.

    I did see once that Simon was perhaps going to incorporate some of these features into SDR Console but nothing further has been said or done. Lets hope?

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