[ntp:questions] PPS signal from Garmin GPS 18x LVC
kostecke at ntp.org
Fri Jan 3 13:27:12 UTC 2014
On 2014-01-03, David Taylor <david-taylor at blueyonder.co.uk.invalid> wrote:
> On 03/01/2014 10:36, Ralph Aichinger wrote:
>> Steve Kostecke <kostecke at ntp.org> wrote:
>>> In my experience the NMEA driver displays the '*' talley-code even when
>>> PPS is in use.
>> Mine does not:
>> remote refid st t when poll reach delay offset jitter
>> oGPS_NMEA(0) .NMEA. 0 l 13 16 377 0.000 0.000 0.002
>> +bevtime1.me .ATOM. 1 u - 64 337 18.300 1.845 0.649
>> *ts2.univie. .PPS. 1 u 48 64 377 12.073 1.952 0.577
>> +ntp.liwest. 131.188. 2 u 26 64 377 8.482 0.554 1.875
>> (ntpd 4.2.6p5)
> Yes, it seems to have been an error in some recent development versions,
> but fixed in 4.2.7p408
For many years I ran a Soekris NET-4801 with a Garmin GPS-18LVC (all of
that hardware is currently in storage). It ran FreeBSD 5.3 and an older
version of NTP.
It _never_ displayed a 'o' for PPS. The only way that you could tell if
PPS was being used was to watch the offset/jitter.
So this is not just an issue with recent development versions.
Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/
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