[ntp:questions] Do I have a lock to my NMEA GPS?

Chuck Swiger cswiger at mac.com
Fri Nov 9 17:45:45 UTC 2012


On Nov 9, 2012, at 8:57 AM, Ralph Aichinger wrote:
> Is this OK for a consumer NMEA GPS without PPS (eTrex) and on a
> jittery USB to serial converter at 4800 Baud?
> 
> ntpq> peers
>     remote           refid      st t when poll reach   delay   offset  jitter
> ==============================================================================
> *GPS_NMEA(0)     .GPS.            0 l   10   64  377    0.000  -87.300 113.691

This looks OK for NMEA, yes.
It's providing time to roughly a tenth of a second level of accuracy.

> I don't want to keep time with this, just check if the hardware works.
> The asterisk in front says I am locked, and hardware is working, does it? 

Yes, the timesource has been fully reachable and is being used as the preferred peer.

Regards,
-- 
-Chuck



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