Stanley Reynolds wrote: > Reduced VE2ZAZ controller to be used as a counter. > > http://i307.photobucket.com/albums/nn306/stanleyreynolds/VE2ZAZreduced.jpg > > Resolution is still inadequate for meaningful comparisons with short averaging times. For longer averaging times all GPSDOs will achieve the stability of the GPS reference. For intermediate averaging times the effect of the disciplining loop on the oscillator instability has to be taken into account.
You need to use a scheme that is capable of picosecond or subpicosecond resolution for single shot measurements if you want to make meaningful measurements of ADEV for short averaging times. You also need to reduce the measurement bandwidth or wideband phase noise may constitute a lower limit the measurement noise. With oscillators that dont have state of the art stability lower phase measurement resolution may suffice. Bruce _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
