[ntp:questions] Frequency Errors +500 PPM...
Kit Plummer
christopher_plummer at Raytheon.com
Thu Feb 3 20:02:59 UTC 2005
FWIW, here is a snip of my ntp.log file:
3 Feb 10:00:14 ntpd[412]: kernel time sync enabled 0001
3 Feb 10:04:33 ntpd[412]: synchronized to GPS_BANC(0), stratum=0
3 Feb 10:36:45 ntpd[412]: time reset -0.873229 s
3 Feb 10:36:45 ntpd[412]: frequency error -512 PPM exceeds tolerance
500 PPM
3 Feb 10:41:02 ntpd[412]: synchronized to GPS_BANC(0), stratum=0
3 Feb 11:47:44 ntpd[412]: no servers reachable
3 Feb 11:48:49 ntpd[412]: synchronized to GPS_BANC(0), stratum=0
3 Feb 12:03:51 ntpd[412]: time reset -0.871702 s
3 Feb 12:03:51 ntpd[412]: frequency error -512 PPM exceeds tolerance
500 PPM
3 Feb 12:08:09 ntpd[412]: synchronized to GPS_BANC(0), stratum=0
What can I do to control the PPM? This is a SPARC-based VME board,
getting its clock from a VME-based SYNCCLOCK32 GPS/IRIG card.
TIA,
Kit
On Feb 3, 2005, at 9:46 AM, Kit Plummer wrote:
> Hey folks,
>
> I am having NTP prolbems. Obviously. But, I am not sure it is NTP,
> or my reference driver - or hardware for that matter. The problem
> appears to be related to an extremely high PPM. Am I understanding
> correctly that this number is derived from whatever is in the
> ntp.drift file?
>
> Well, the real problem appears to be a 1 second step - sporadically.
> Though I haven't really been able to prove that either...it is just
> heresay from a system user.
>
> Also, can someone explain this output from ntpd -d:
>
> peer GPS_BANC(0) event 'event_reach' (0x84) status 'unreach, conf, 1
> event, event_reach' (0x8014)
>
> If there is some other information I can provide for troubleshooting
> purposes let me know.
>
> TIA,
> Kit
> -----------------------------------------------------------------------
> -
> Kit Plummer
> Operations Research and System Performance Dept.
> Raytheon Missile Systems
>
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