Dr Bruce Griffiths <[EMAIL PROTECTED]> wrote: > Most GPS receivers with higher frequency outputs than 1Hz, phase > modulate the high frequency output in this way and the datasheets > explicitly indicate this. > > Thus there would appear to be little advantage in phase locking to the > 10KHz signal with a short loop time constant. > > To be absolutely sure you will need to use an oscilloscope to observe > the synchronous jitter in the 10KHz waveform.
The jitter from the "phase jerked" 10kHz would be in the several to tens of ns range, once a second, right? Period of 10kHz is 1E5 ns. I don't think I can trust my old analog scopes to do this, but a fancy coincident trigger (require coincidence with PPS) on a digital storage scope with a crystal timebase might see this. Sounds more like a job for histogramming interval measuremnts. (In my lab days we did this with a TAC followed by a PHA for much larger scale jitter measurements). Tim. _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
