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Red Pitaya ppm issue #1381

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DrSDR opened this issue Oct 12, 2024 · 4 comments
Open

Red Pitaya ppm issue #1381

DrSDR opened this issue Oct 12, 2024 · 4 comments
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@DrSDR
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DrSDR commented Oct 12, 2024

using the ethernet red pitaya 125-14, it works fine for RX, however when i change the ppm field , i do not see the signal shift in freq.
it seems the ppm field has no effect on the red pitaya
redpitaya=192.168.1.100:1001 using gqrx software.
thanks

@argilo
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argilo commented Oct 12, 2024

This appears to be a bug in gr-osmosdr. The redpitaya_source_c::set_freq_corr method updates an instance variable, but does not immediately retune the radio:

https://gitea.osmocom.org/sdr/gr-osmosdr/src/branch/master/lib/redpitaya/redpitaya_source_c.cc#L227-L232

I expect that an update to the PPM value will take effect the next time the frequency is adjusted.

@argilo argilo added the bug label Oct 12, 2024
@DrSDR
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DrSDR commented Oct 12, 2024

ok thank you, i will give that a try.
you are talking about the hardware center freq or the tuner offset freq ?

@argilo
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argilo commented Oct 12, 2024

Hardware center frequency.

@DrSDR
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DrSDR commented Oct 12, 2024

ok thanks, it worked, enter in ppm value, then change hardware freq, i saw the ppm correction get applied. red pitaya is now tuned up. thanks for the help.

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