[ntp:questions] refclock on Windows graphs
mayer at ntp.org
Sat Mar 21 21:31:23 UTC 2009
David J Taylor wrote:
> Dave Hart wrote:
>> The 150us offsets are while slewing to try to catch up with the 3ppm
>> frequency shift as the heat comes on. I have to imagine a Windows PC
>> with a more stable oscillator (lower temperature coefficient to
>> frequency) would do better, though I'm not deluding myself that it
>> would match the performance of FreeBSD, with its advantage of knowing
>> the precise relationship between the counter and the system clock.
> Yes, it would be nice to have a more stable crystal in that system.
> Agreed on the comparison with FreeBSD. Isn't there an NTP simulator where
> someone could model jitter and offset against a 2.5ppm sinusoidal or
> triangular frequency swing?
Just build the NTP simulator that comes with the NTP sources. There are
config options you need to build this.
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