RTL-SDR FM reception

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Calo1
Posts: 1
Joined: Wed Aug 27, 2025 9:23 am

RTL-SDR FM reception

Post by Calo1 »

Hello, I would like to ask what the quality of FM radio reception is like using RTL-SDR dongles. My experience is that it is below average.
hudiy
Site Admin
Posts: 440
Joined: Mon Jul 14, 2025 7:42 pm

Re: RTL-SDR FM reception

Post by hudiy »

You can try setting the gain of your RTL-SDR dongle manually.

List of supported gain values for your dongle can be listed using the command: rtl_test -t

If Hudiy is running, you need to stop it first to release access to the dongle. Also, make sure the rtl-sdr package is installed.

Code: Select all

pkill hudiy
sudo apt install rtl-sdr
rtl_test -t
In general, the higher the gain, the better the reception should be. You can set the gain in main_configuration.json (https://github.com/wiboma/hudiy/blob/ma ... md#fmradio)

Adjusting the gain will also require tuning the squelchLevel and squelchLimit (used in scanning). Keep in mind that higher gain may cause the dongle to draw more power from the USB port.
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