Yes, you must be right, I must have made a mistake when I set up the flow graph. How do you know the sample rate delivered by the UHD and how is the Polyphase Resampler implemented into the flow graph ?
Francois Tom Rondeau wrote: > > On Thu, Feb 24, 2011 at 7:17 PM, Anoth <francois.darr...@gmail.com> wrote: >> >> Hi Josh, >> >> Yes, I have already though about that and I tried to match the sample and >> sound card rates without success (but I might made a mistake). I have >> also >> read on the Internet that it might come from the sound card which cannot >> support all rates but I did not find anything more about that subject. >> Here >> the python code generated by GRC : >> http://old.nabble.com/file/p31009164/wfm_rx.py wfm_rx.py >> >> Francois > > I think Josh is right and it's a sampling rate error. When you set the > sampling rate of the USRP, ask the UHD driver what the current > sampling rate is. Use what it returns to you to adjust the sampling > rate properly. I ran into this same issue and solved it by using the > pfb_arb_resampler block (Polyphase Resampler in GRC) to adjust the > rates correctly. > > Tom > > >> Josh Blum-2 wrote: >>> >>> >>>>>>> gr_fir_ccc: using SSE >>>> aUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaU >>>> >>> >>> These characters being printed means that you have mismatched sample >>> rates between your USRP device and sound card. Could this be the case? >>> >>> -josh >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> Discuss-gnuradio@gnu.org >>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >>> >> >> -- >> View this message in context: >> http://old.nabble.com/FM-Receiver-tp31009069p31009164.html >> Sent from the GnuRadio mailing list archive at Nabble.com. >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://old.nabble.com/FM-Receiver-tp31009069p31010011.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
