The Allan deviation is not frequency stability - it's the ADEV of the noise on the receiver signal.
Cheers Michael On Thu, 9 Mar 2017 at 3:00 am, jimlux <jim...@earthlink.net> wrote: > On 3/7/17 9:29 PM, jimlux wrote: > > >> Sent from my smartphone. > >> -------- Original message --------From: jimlux <jim...@earthlink.net> > >> Date: 07/03/2017 22:08 (GMT+01:00) To: Discussion of precise time > >> and frequency measurement <time-nuts@febo.com> Subject: [time-nuts] > >> time/sampling behavior of RTL-SDR > >> Has anyone ever looked at the timing consistency/behavior of the cheap > >> RTL-SDR dongles? > >> > >> That is, if you feed a sine wave in and get the samples out via the USB > >> interface, are there missing samples? What's the ADC clock look like? > >> > >> If you had two of them, and you determine the relative phase of them at > >> some time t0, and you let it run for minutes, how far will it have > moved? > > > > > Aha, someone has measured the Allan Deviation (although they don't say how) > > http://www.rtl-sdr.com/wp-content/uploads/2015/03/rtl_R820T2.pdf > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.