[ntp:questions] PSYCHO PC clock is advancing at 2 HR per second

David J Taylor david-taylor at blueyonder.co.uk.invalid
Wed Mar 21 19:44:48 UTC 2012


"Ron Frazier (NTP)" <timekeepingntplist at c3energy.com> wrote in message 
news:4F69E531.7070602 at c3energy.com...
[]
> C) What your ntp plotter plots as the red line on the jitter tab with a 
> loopstats file.  Not sure how that's derived.

Red-line: jitter straight out of the loopstats data.  Scale on the left.

Green line: same, but averaged over the time you select.  Note that the 
scale is on the right-hand side, and is ten times that on the left.  This 
so that peaks show more clearly on the raw graph.

> D) What your ntp plotter plots as the black line on the jitter tab with 
> a loopstats file, a weighted moving average, presumably of the red line.

The RMS variation of the offset in a one-hour period.  Not sure this is 
particularly useful, quite honestly.

Cheers,
David 



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