On Mon, Apr 24, 2017 at 10:07:47AM -0700, Gary E. Miller wrote: > frequency offset: > The difference between the ntpd calculated frequency and the local system > clock frequency (usually in parts per million, ppm) > jitter, dispersion: > The short term change in a value
For me jitter is about chances in the interval. Some examples which I think are relevant are: - For a PPS signal, the signal generated by the source is not exactly 1 second each time, but on average it's 1 second. - For the same PPS signal, there is a variable delay between the source generating the edge and the PC having seen it and measured the time. - A packet send over a network doesn't always have the same delay. dispersion for me is the standard deviation Kurt _______________________________________________ devel mailing list devel@ntpsec.org http://lists.ntpsec.org/mailman/listinfo/devel
