[ntp:questions] How to determin hardware latency for PPS offset given simple tools.
bodosom at gmail.com
Fri May 24 20:28:19 UTC 2013
I have four GPS receivers into four different computers. I've assumed that I
should be able to get small offsets between them but to do so I need
to set time1. If that's the correct approach how do I pick the "right"
system to be the benchmark. So far I've just been assuming that
the purpose built M. Tharp server should have the lowest latency but I'm not sure -- in any case, at present, I can't adjust it.
Each machine in the truncated table below (except 210) has a time1
value derived in an ad hoc fashion.
l r refid st delay offset jitter
1 o22.0 .PPS. 0 0.000 -0.001 0.001
2 +244 .PPS. 1 0.068 0.000 0.006
2 *210 .GPS. 1 0.514 -0.008 0.136
2 +192 .PPS. 1 0.455 0.008 0.032
I feel as if this topic should be clearly explained somewhere but I've been
unable to find it.
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