Working FM radio on GNU radio and POTHOS

Projects LimeSDR
22

@N1JEZ,

So did I - I changed mine to 162.475 MHz for default. #GreatMinds :slight_smile:

Also, I had to set the SourceSampleRate to 700 because the voice pitch because of the sample rate seemed a little ‘off’ from what I’m used to, so I slowed it to 700 and it seemed much better.

73 de Marty, KN0CK

23

Hi there.
Here my two cents, another basic FM receiver, but tunable, and BW adjustable. So there is no problem with the center 0-point.
Use at your discretion.

https://doublepanic.com/

LimeSDR_receiver_layout.png1607×987 649 KB

Regards

1 Like
24

Pothos seems good. I think the FM example is mono, does anyone know how to make it stereo? Just a hint is all I need but maybe I will try to make it stereo. I have played around a little but no stereo.

This FM receiver is much more sensitive than the one I have in GRC and also better than Gqrx.

I must have someting missing from the install or I installed Pothos wrong as I get an error at startup.

Failed to query JSON Docs from tcp://1.2.3.4:4140 - Remote Client Error: Pothos::RemoteClient(tcp://1.2.3.4:4140): Connection refused

1 Like
25

So. the “Dev Args” in simple_fm_demod.pothos example:

  • On the left side of the screen, there are three vertical tabs.
  • Choose the RfFrontend tab.
  • On that tab double-click the SDR Source widget.
  • In the window that appears on the side, choose the horizontal tab Streaming

Not that it does anything for me. I still get nothing but static…

26

When assembling the devices, I connected two antennas to RX1_H and RX2_L.
For simple_fm_demod.pothos example, can anyone tell me how to use RX2_L?

27

Hi guy,
I get a problem about limesdr on gnuradio, as follow:
Trying to fill up 1 missing channel(s) with null source(s).
This is being done to prevent the application from crashing
due to gnuradio bug #528.
Can you help me solve the problem? Thank you.

28

Not insignificant at all. Greatly appreciated. Thank you.

29

what has to be done to get it working on the limesdr mini?

30

Please note that there is also a Pothos users group and, as with other toolkits and applications, such questions may be better posted to their community forums:

https://groups.google.com/forum/#!forum/pothos-users

31

i was not able to get the fm receiver working (in this thread) on my limesdr-mini using grc.
i was able to get this example working https://wiki.myriadrf.org/Gr-limesdr_Plugin_for_GNURadio but it is not tunable. the “FM_receiver.grc” in the examples directory

34

hello，can you share your screen of the example FM_receiver.grc in Gr-limesdr_Plugin？