gnuradio on HF
Posted: Sun Dec 20, 2015 7:31 pm
Has anyone had any success getting gnuradio / gr-osmocom working with the sdrplay on HF (< 30 MHz)?
I've had some success getting gr-osmocom working with sdrplay on VHF. Most of my testing is done with local FM broadcast stations (88 - 108 MHz), but no luck on HF. My testing here has been in the 3.5 and 7.0 MHz amateur bands.
I have HDSDR working under Ubuntu Linux 14.04 and it works on both HF and VHF. However, when I switch to gnuradio and try some experiments, it seems like something gets messed up in the sdrplay and I have to unplug and replug the USB plug to reset the sdrplay.
Here's the steps that can reproduce things for me. I fire up HDSDR and monitor the amateur traffic on 40 meters (LSB around 7.25 MHz). Everything sounds find. I stop HDSDR and run a flowgraph in gnuradio. The flowgraph is simply an gr-osmocom source connected to a WX GUI FFT Sink. I don't get a frequency display similar to what I see on HDSDR, no matter what settings I try. I then exit gnuradio and restart the sdrplay on HDSDR. The same stations heard before are heard on different frequencies, sound garbled and multiple stations are heard on top of each other. If I then unplug and replug the USB on the sdrplay, it sounds normal as before. I'm assuming that the gr-osmocom block is somehow messing with the parameters in the sdrplay. I tried saving a profile from when the sdrplay was sounding "normal" and restoring the profile when it was "messed up," but that didn't help. I still had to cycle the power.
I'd really like to see sdrplay working with gnuradio. The main reason I bought the sdrplay (I have other SDR radios, including a FlexRadio 6700 and a Softrock), so that I could experiment with SDR on HF.
73,
Mark
I've had some success getting gr-osmocom working with sdrplay on VHF. Most of my testing is done with local FM broadcast stations (88 - 108 MHz), but no luck on HF. My testing here has been in the 3.5 and 7.0 MHz amateur bands.
I have HDSDR working under Ubuntu Linux 14.04 and it works on both HF and VHF. However, when I switch to gnuradio and try some experiments, it seems like something gets messed up in the sdrplay and I have to unplug and replug the USB plug to reset the sdrplay.
Here's the steps that can reproduce things for me. I fire up HDSDR and monitor the amateur traffic on 40 meters (LSB around 7.25 MHz). Everything sounds find. I stop HDSDR and run a flowgraph in gnuradio. The flowgraph is simply an gr-osmocom source connected to a WX GUI FFT Sink. I don't get a frequency display similar to what I see on HDSDR, no matter what settings I try. I then exit gnuradio and restart the sdrplay on HDSDR. The same stations heard before are heard on different frequencies, sound garbled and multiple stations are heard on top of each other. If I then unplug and replug the USB on the sdrplay, it sounds normal as before. I'm assuming that the gr-osmocom block is somehow messing with the parameters in the sdrplay. I tried saving a profile from when the sdrplay was sounding "normal" and restoring the profile when it was "messed up," but that didn't help. I still had to cycle the power.
I'd really like to see sdrplay working with gnuradio. The main reason I bought the sdrplay (I have other SDR radios, including a FlexRadio 6700 and a Softrock), so that I could experiment with SDR on HF.
73,
Mark