Hi Marcus, ok, here is the sketch: http://www.dl8rds.de/index.php/Datei:2015-09-18-gnuradio_rtlsdr1.png
There is no squelch in the data path. But thanks a lot for explaining the effects of a squelch. Maybe there is another reason for my observation, because I unplugged my antenna from the rtlsdr stick for a while and there were no audio underruns today. Let me observe some more time and I will come back on this if I have new insights. best73 markus Am Dienstag, den 22.09.2015, 21:28 +0200 schrieb Markus Heller: > Hi Marcus, > > I have been reading from you more frequently on this list than you've > been reading from me :-) > > I have my setup in my office computer, so I will send the setup to this > list tomorrow. > > Thanks ahead! > > vy73 > markus > dl8rds > > Am Dienstag, den 22.09.2015, 19:56 +0200 schrieb Marcus Müller: > > Hi Markus, > > > > nice to be hearing from you! > > > > I'm making assumptions about your RX flow graph here: > > > > osmocom source --> squelch of some sort --> FM demod/ AM demod of sorts > > --> Audio sink > > > > If the squelch is set to stop the flow of samples as long as there's not > > enough signal, then downstream, the audio sink doesn't get any samples, > > though it always needs the same amount of samples per second. Hence, > > Underflows. > > > > Hopefully, that explains the issues you're having; if not, please > > explain your receiver in a little more detail, > > > > Best regards, > > Marcus > > > > On 22.09.2015 18:34, Markus Heller wrote: > > > Hi, > > > > > > playing around with my RTLSDR stick (RTL2832U / Rafael Micro R820T > > > tuner) I observed that whenever the reception (signal quality) is bad, I > > > am getting Audio Underruns and glitches in the accoustics. > > > > > > How can that happen? I always thought the sample rate was constant? When > > > designing the sketch I took good care that the sample rates were fine. > > > Whenever I get good signal quality I have no underruns at all. > > > > > > Thanks in advance, > > > > > > br > > > markus > > > > > > > > > _______________________________________________ > > > Discuss-gnuradio mailing list > > > [email protected] > > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > [email protected] > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
