[ntp:questions] Using Trimble TSIP under Linux
david at ex.djwhome.demon.invalid
Mon Nov 26 23:59:32 UTC 2012
David Taylor wrote:
> server reached over the LAN to have an offset of -0.028 milliseconds,
> whereas its own PPS source is reported to have an offset of -0.001
> milliseconds. Is that the right sign and amount for the offsets you
> might expect comparing the LAN input and the GPIO pin interrupt for the
> PPS source?
Offsets should be randomly distributed between + and - signs. If they
are all of one sign, you are not locked up or there is a bug. They
should be of s similar magnitude to the jitter.
They may not be evenly distributed, because of limitations of the
network, but they must be spread across zero.
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