On Monday, August 6, 2018 07:12 CEST, "Richard (Rick) Karlquist" <rich...@karlquist.com> wrote: > I need to measure ADEV on a source that has spurious > sine wave frequency modulation on it. I am looking for a > formula that would tell me ADEV, vs FM deviation and > carrier frequency. I'm not sure if modulation frequency > or tau matter. I am hoping to determine how much > I need to clean up the signal order to get down to a particular > ADEV measurement threshold.
Use an ADEV sample period of the FM modulation frequency period or sub-harmonic period. This samples the frequency modulated signal at a constant phase of the modulation and generate notches at the FM modulation side-bands of the ADEV samples. Result: the ADEV samples don't contain the FM modulation. Henk Peek _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
