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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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ppm not working #1027

Open ghost opened 2 years ago

ghost commented 2 years ago

I find that changing the ppm frequency correction value makes no difference in gqrx versions 2.15.1. I loaded version 2.14.5 and that also does nothing but ppm control works fine in 2.11.3.

I run macOS 11.6 and RFSpace CloudIQ. The Device string in all cases is cloudiq=192.168.7.12:50000, input rate 240000. The way I determine the correction is to listen to 10 MHz WWV and adjust ppm until the audio tones are the same in LSB and USB. Without this working, I must tune to 10.000012 MHz to get the pitches to match, changing the ppm value makes no difference. The CloudIQ itself has not changed since I purchased it several years ago.

vladisslav2011 commented 2 years ago

v2.11.3 was using forked gr-osmosdr-gqrx Current master is using mainline gr-osmosdr. Mainline gr-osmosdr lacks support of setting frequency correction on RFSpace devices.

ghost commented 2 years ago

Sorry to hear this. Hope it can be ported again someday.

argilo commented 2 years ago

Let's get a patch submitted to gr-osmosdr then. I have submitted several patches in the past which were merged.

Is the forked code available somewhere?

argilo commented 2 years ago

I guess it's here: https://github.com/csete/gr-osmosdr-gqrx

argilo commented 2 years ago

And here's the missing commit: https://github.com/csete/gr-osmosdr-gqrx/commit/d66df300eb53df3b153918919c3cefffb1c49051

argilo commented 2 years ago

I sent the patch to the osmocom-sdr mailing list. Hopefully it will be accepted.

https://lists.osmocom.org/hyperkitty/list/osmocom-sdr@lists.osmocom.org/thread/MY2MEORWKXPFW4KJ7FDY77IBLAQTKSM4/