[ntp:questions] pps breaks when nmea is enabled for ntpd

David Taylor david-taylor at blueyonder.co.uk.invalid
Sun Jun 16 05:17:45 UTC 2013


On 16/06/2013 01:54, Richard Cagley wrote:
> Very interesting. So, you just have this as your ntp.conf file?
>
> server  127.127.20.1    mode 0  minpoll 4 maxpoll 4  prefer
> fudge   127.127.20.1    flag1 1 flag3 1 refid PPS
>
> When I do this I think only the GPS/127.127.20.0 line shows up in the
> output. How do I know PPS is working? With just these two lines in my
> ntp.conf file should I expect two lines in the output of ntpq -p?
>
> I'll have to confirm this when I get co-located with the hardware tomorrow.

Richard,

You know the PPS is working because the tally code changes from "*" to 
"o" in the ntpq -p output:

  *127.127.20.1    .PPS.            0 l    3   16  377 ....

  o127.127.20.1    .PPS.            0 l    3   16  377 ....

My ntp.conf file also contains local backup stratum-1 servers, and 
Internet servers, in case of failure of the GPS receiver.

BTW: please stop top-posting.
-- 
Cheers,
David
Web: http://www.satsignal.eu



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