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HW involved:

  • RTL-SDR / SDRPlay dongle
  • old linux PC / raspberry Pi 3b

SW involved:

  • GQRX and the underlying dependencies; same versions except for gr-osmosdr
  • Debian Strertch based Linux on the PC, gr-osmosdr v0.1.5
  • Debian Buster based Linux on the Pi 3b, gr-osmosdr v0.1.4

The following combos are working fine:

  • PC + SDRPlay dongle
  • PC + RTL dongle
  • Pi 3b + RTL dongle

And when I try

  • Pi 3b + SDRPlay dongle

this happens, on and off, for the whole spectrum...

https://rumble.com/v59rkwz-sdrplay-raspberry-pi-spectrum.html

What I have tried:

  • unplugged mouse and keyboard from Pi 3b's USB ports
  • a dummy 47 ohm load instead of the antenna
  • running the Pi 3b + SDRPlay dongle off of 5V battery pack
  • antenna and USB cable is the same for PC / Pi 3b

To me it follows logic that both the Pi 3b and the SDRPlay dongle are in working order. What is it that escapes my understanding ?

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    $\begingroup$ "SDRplay" is the company name. Maybe share the exact name and rev of the hardware you are asking about. $\endgroup$ Commented Aug 13, 2024 at 18:31
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    $\begingroup$ What makes you think this is noise, and not mobile phone transmissions? (The allocated use of the 2-2.1GHz frequency band) $\endgroup$ Commented Aug 14, 2024 at 8:14
  • 2
    $\begingroup$ Where are you located (Maidenhead square like IO81 is detailed enough), and what frequency range are you looking at in the video? That, combined with sigidwiki.com/wiki/Database will help rule out a licensed transmission. $\endgroup$ Commented Aug 14, 2024 at 9:14

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