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xmikos / soapy_power

Obtain power spectrum from SoapySDR devices (RTL-SDR, Airspy, SDRplay, HackRF, bladeRF, USRP, LimeSDR, etc.)
MIT License
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Does soapy_power ensure LimeSDR TX mode is off (if actually needed) ? #4

Open mariocannistra opened 7 years ago

mariocannistra commented 7 years ago

In this post here https://discourse.myriadrf.org/t/limesuite-tx-mode-and-fft-viewer-issues/991 you can read that LimeSDR has TX mode enabled by default (not sure if this is due to the default.ini file or actually a default behaviour of the HW). If spurious emissions by the board itself can be received ... then I could get corresponding RFI in my radioastronomy scans at HF.

Could you please check if the init sequence used by soapy_power ensures the TX is off ? That post mentions the necessary settings.

I still couldn't verify presence of those emissions experimentally (looking at the plotted FFT) but will certainly do this as soon as I can.

mariocannistra commented 7 years ago

I got an answer from @tony.bigbee on this thread here https://discourse.myriadrf.org/t/limesuite-tx-mode-and-fft-viewer-issues/991/5 ...I think that if the board keeps the last settings used, then there's the risk that using soapy_power just after testing with TX on, would have TX mode still active if the mode is not cleared by soapy_power...