[ntp:questions] PPS signal from Garmin GPS 18x LVC

Adrian P mailing-lists at pascalau.ro
Sat Dec 28 20:40:48 UTC 2013


Hi,

How do I know that my NTP server is actually using the PPS signal from
my Garmin GPS 18x LVC?

I have the following NMEA driver configured in /etc/ntp.conf:

server 127.127.20.0 mode 1 minpoll 4 maxpoll 4 prefer
fudge 127.127.20.0 flag1 1 flag2 0 flag3 1 refid PPS

The below output shows me that NTP is using the NMEA GPS clock,
however I cannot find anywhere a command that tells me that PPS signal
is used as well...

root at debian:~# ntpq -c clockvar
associd=0 status=00f1 , 15 events, clk_no_reply,
device="NMEA GPS Clock",
timecode="$GPRMC,202549,A,xxxx.2257,N,xxxxx.2075,E,000.0,195.2,281213,004.8,E,A*1D",
poll=13, noreply=36, badformat=0, baddata=0, fudgetime1=0.000, stratum=0,
refid=PPS, flags=5
root at debian:~#

Many thanks,
Adrian


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