Hi Folks--
I've setup a host with gps and wwv audio and the wwv audio gets down
to within 100 microseconds of the gps routinely. As an experiment, I
added two external ntp servers to this configuration. Both of these acts
external servers are "close," being within 20 millisecond ping times.
Oddly, one of the acts hosts is consistently 3-5 milliseconds behind,
and the other 3-5 milliseconds ahead:
[EMAIL PROTECTED] ntpq -p -n
remote refid st t when poll reach delay offset jitter
==============================================================================
*127.127.20.0 .GPS. 0 l 31 64 377 0.000 -0.001 0.008
+127.127.36.0 .WV20. 0 l 34 64 376 0.000 -0.082 0.027
x69.25.96.13 .ACTS. 1 u 804 1024 377 17.315 -4.407 0.358
x207.126.98.204 .ACTS. 1 u 572 1024 377 14.020 3.622 0.184
Quite curious. The jitter on the network connection to these hosts typically
is less than a millisecond, although I've seen some Big Combers roll in, the
internet being what it is.
I wonder whats going on with these hosts. The refclock_acts driver code has
a comment that claims the acts adjusts for the round trip delay.
../Steven
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