[ntp:questions] using both a PPS source and a HBG (dcf-77-like) timesource?
Dennis Hilberg, Jr.
timekeeper at dennishilberg.com.invalid
Mon Jan 14 17:19:11 UTC 2008
Folkert van Heusden wrote:
> Well if I remember correctly someone said to me once that the
> time-string returned by cheap gps device (like my garmin 18 lvc)
> sometimes is a bit off while its PPS signal is fine.
> Currently I'm syncing against NMEA/PPS and seeing quiet a big offset:
> remote refid st t when poll reach delay offset jitter
> xGPS_NMEA(0) .GPS. 0 l 7 16 377 0.000 -185.08 1.001 <---
You can even out that delay in the GPS time by using the 'fudge' option.
server 127.127.20.0 minpoll 4
fudge 127.127.20.0 time1 0.185
I do the same thing with my GPS 18 LVC, only I use gpsd with the SHM drivers.
> Folkert van Heusden
Dennis Hilberg, Jr. \ timekeeper(at)dennishilberg(dot)com
NTP Server Information: \ http://saturn.dennishilberg.com/ntp.php
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