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gqrx-sdr / gqrx

Software defined radio receiver powered by GNU Radio and Qt.
http://gqrx.dk
GNU General Public License v3.0
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Cannot control gain and turn off AGC #874

Open rolnas opened 3 years ago

rolnas commented 3 years ago

Recently I got Airspy HF+ Discovery - it works OK, but in challenge situations I want to turn off AGC and control gain manually. In 2.13.5 gqrx it is not possible to control both. For RTL-SDRv3 I can control both for I/Q mode (not direct).

P.S. I'm using appimage with libairspyhf library (1.6.8). Firmware was upgraded to latest 3.0.7-cd.

nmaster2042 commented 3 years ago

This is a gr-osmosdr part.

If you want to control gain, you'll need to build a forked version of gr-osmosdr and gqrx.

There is one with improved airspy hf+ support here:

https://github.com/ast/gr-osmosdr/tree/airspyhf

I'm using it with success for some days now.

rolnas commented 3 years ago

I did succeed partially soapy way via https://github.com/pothosware/SoapyAirspyHF/, but I found, that I cannot control attenuation/AGC on 73.050MHz (transceiver IF), but that works on HF frequencies. Probably hardware limitations :-(