[ntp:questions] Trimble Setup Question
Greg.Blakely at MCI.com
Sat Aug 23 23:52:21 UTC 2003
Hi, folks. Please forgive the beginner-level question, but I've tried
something with NTP that I've not done before, and am running into a few
What I'm doing that's new is running a Trimble Acutime 2000 GPS
receiver. I have it running, after a fashion, but need to clear up a
few hazy spots:
+ I'm running the "29"-type (Palisade) interface. I'm using
TSIP output from the Acutime. Should I be using NMEA instead?
If so, does that change the type of interface I should choose in NTP?
+ The Acutime is sending packets 41, 6D, 46, 4B, 82, 42, 43, 4A,
54, 56, 83, 84, 8F-20, and 5A. Does NTP need all that?
+ What all is needed in ntp.conf? Do I want to use my local hardware
as a clock source? Do I peer with other stratum one clocks? If so,
+ I have ignored the "offset" field in the "peer" billboard of ntpq in
the past, because, as a client, my computer chose the best source,
'offset' didn't matter a whole lot. Now, I find that most of the
stratum one clocks that I 'peer' with have offsets of 537.950, while
Trimble Acutime has an offset of -73.123 (as an example). I'm
that other clocks have a positive offset of several hundred while my
stratum one clock has a negative value. Is this a good thing?
+ After a while, my ntp server stops trusting the Acutime clock source,
placing an 'x' next to its entry in the 'peers' billboard. What is
+ I will gladly send any debugging info that is necessary to get the
answers to some of these questions.
Thanks, folks. I guess I never fully appreciated the headache of
adding my own stratum one clock into the mix.
- Greg -
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