Home
Gqrx is an experimental software defined AM/FM/SSB receiver implemented in GNU Radio and Qt user interface.
To run this application you need to have GNU Radio 3.3 with the gr-qtgui component installed, as well as a USRP1. Of course, it can be modified to use USRP2 or UHD.
Currently implemented functions:
- Set USRP frequency, RF gain and bandwidth (250k, 500k, 1M, 2m or 4M)
- Show USRP spectrum
- Variable bandpass filter
- AM, SSB, FNN and FMW demodulators
- AGC in AM and SSB modes
- One click recording of audio into .wav file and playback of last recorded audio file
To start the receiver execute the gqrx.py Python script. Use -h to see a list of command line options.
If you have problems with audio while changing receiver settings at runtime you can try to apply this patch: https://gist.github.com/664132
I have also made some modifications to the gr-qtgui code (enable grid, nicer colors and less vertical space) which are avaialble in this patch: https://gist.github.com/668462. This is not mandatory though, just part of the experiment.
You can modify the GUI by opening the gqrx_qtgui.ui file in Qt Designer. If you make changes you have to recompile the UI code using:
pyuic4 gqrx_qtgui.ui -o gqrx_qtgui.py