Danny Mayer wrote: > David J Taylor wrote: >> David Woolley wrote: >>> Danny Mayer wrote: >>> >>>> Increased polling frequency increases jitter. >>> I think jitter was being used loosely here, not with the specific >>> sense of high frequency variations. >> >> Yes, my original question referred to looking at a graph of offset >> plotted over a day (sampling at 5-minute intervals) and trying to >> judge the amount of short-term oscillation as opposed to the >> longer-term drifts (e.g. those caused by temperature variations). > > Perform a FFT (Fast Fourier Transform) on the data and look for the > peaks. > > Danny
A visual inspection is more than adequate in this case, although I agree that the FFT could be used for quantitative analysis. Cheers, David _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
