[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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