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Steve Markgraf steve at steve-m.deHi Jean-Michel, On 28.10.2016 08:07, Jean-Michel FRIEDT wrote: > (150 mV amplitude, 100 kHz) but still no baseband signal, and on the FFT > of the osmosdr output I still see the spectrum of the FM band when tuning > to 100 MHz rather than the samples from the (initially unconnected) Q > input. The problem is that by enabling the direct sampling mode, the RTL2832 is forced to low-IF mode and only one ADC is enabled. For your purpose, the device needs to be in zero-IF mode, which normally wouldn't be used if a low-IF tuner like the R820T is attached. Please see the attached patch, if you call rtlsdr_set_direct_sampling with 1 after applying it should work. Regards, Steve -------------- next part -------------- A non-text attachment was scrubbed... Name: 0001-hack-enable-both-ADCs-with-low-IF-tuner-for-data-acq.patch Type: text/x-diff Size: 1481 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/osmocom-sdr/attachments/20161028/13837706/attachment.bin>