[time-nuts] FreeBSD with Garmin GPS 18 LVC
Hal Murray
hmurray at megapathdsl.net
Sat Mar 3 18:38:49 EST 2007
There is lots of info on the Garmin GPA-18-LVC over here:
http://ntp.isc.org/bin/view/Support/ConfiguringGarminRefclocks
>> server 127.127.20.1 mode 1 prefer
The "mode 1" part says to use the GPRMC sentences. Is your GPS setup to send
them automatically?
>> fudge 127.127.20.1 time1 0.000 flag3 1 refid PPS
I'd leave off the flag3 until you get it off the ground.
> AFAIK the prefer must be on a server-line. It tells ntpd what server
> numbers the seconds. You should probably hand pick a server for that
> purpose.
The PPS/ATOM driver uses the prefer keyword to identify another driver so it
can do the which-second logic.
Driver 20 is NMEA. It does it's own PPS thing and doesn't need the prefer
trick.
--
These are my opinions, not necessarily my employer's. I hate spam.
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