[LinuxPPS] NTP not using PPS
Udo van den Heuvel
udovdh at xs4all.nl
Thu Oct 25 18:38:01 CEST 2007
susmi sarah george wrote:
> i got following outputs, some info are coming related to PPS in log
> messages. i dont know whether my ntpd is taking PPS or not. so please
> conform it.
>
>
> [root at localhost log]# ntpq -p
> remote refid st t when poll reach delay offset jitter
> ==============================================================================
> *GPS_NMEA(0) .GPS. 0 l 8 16 377 0.000 -0.465 0.202
> LOCAL(0) .LOCL. 10 l 14 64 377 0.000 0.000 0.004
Your GPS is preferred (see the *).
It is max reachable (377).
offset and jitter can improve over time.
Looks good!
> So, please tell me what to do next.if its ok how to check accuracy?
Let it run for a while.
You can make statistics and plot graphs.
Maybe use mrtg or gnuplot, etc.
Depending on what you want others can explain better than I.
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