[ntp:questions] Garmin 18lvc working (finally!)

crichmon at localhost.localdomain crichmon at localhost.localdomain
Wed Mar 29 04:26:23 UTC 2006


Following Dave Taylor's config and setting the unit for
GPRMC NEMA strings seems to have got me going.  Here's
some of the data.  Not sure what to make of the log
messages.  At the moment, the unit is on top of the bookself
in my office.

/usr/sbin/ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
xlp486.chaos.hom 63.192.96.2      3 u   40  128  377    0.189    5.224   0.018
*GPS_NMEA(1)     .PPS.            0 l   22   64  377    0.000    0.002   0.001

grep -v ^# /etc/ntp.conf

server 192.168.0.1
server 127.127.20.1 mode 1 prefer
fudge  127.127.20.1 time1 0.000 flag3 1 refid PPS

driftfile /etc/ntp/drift
broadcastdelay  0.008

Some /var/log/messages messages:

Mar 27 18:01:07 tua512 kernel: adjtimex: ntpd could be using obsolete ADJ_TICKADJ

Mar 28 19:17:38 tua512 ntpdate[1549]: step time server 192.168.0.1 offset -0.001376 sec
Mar 28 19:17:38 tua512 kernel: adjtime: ntpdate used obsolete ADJ_OFFSET_SINGLESHOT
Mar 28 19:17:38 tua512 ntpd:  succeeded
Mar 28 19:17:38 tua512 ntpd[1554]: ntpd 4.2.0a at 1.1199-r Mon Feb 27 12:05:49 PST 2006 (1)
Mar 28 19:17:38 tua512 ntpd[1554]: precision = 1.000 usec
Mar 28 19:17:38 tua512 ntpd[1554]: Listening on interface wildcard, 0.0.0.0#123
Mar 28 19:17:38 tua512 ntpd[1554]: Listening on interface lo, 127.0.0.1#123
Mar 28 19:17:38 tua512 ntpd[1554]: Listening on interface eth0, 192.168.0.3#123
Mar 28 19:17:38 tua512 kernel: adjtimex: ntpd could be using obsolete ADJ_TICKADJ
Mar 28 19:17:38 tua512 ntpd[1554]: kernel time sync status 2040
Mar 28 19:17:38 tua512 ntpd[1554]: frequency initialized 34.464 PPM from /etc/ntp/drift
Mar 28 19:17:38 tua512 ntpd: ntpd startup succeeded
Mar 28 19:20:55 tua512 ntpd[1554]: synchronized to GPS_NMEA(1), stratum 0
Mar 28 19:20:55 tua512 ntpd[1554]: kernel time sync disabled 2141
Mar 28 19:21:58 tua512 ntpd[1554]: kernel time sync enabled 2107
Mar 28 19:31:37 tua512 ntpd[1554]: kernel time sync disabled 2307
Mar 28 19:32:33 tua512 ntpd[1554]: pps sync disabled
Mar 28 19:32:42 tua512 ntpd[1554]: kernel time sync enabled 2107

> /usr/sbin/ntpdc -c kern
pll offset:           2.777e-06 s
pll frequency:        34.122 ppm
maximum error:        0.002899 s
estimated error:      1.4e-05 s
status:               2107  pll ppsfreq ppstime ppssignal nano
pll time constant:    8
precision:            6.28e-07 s
frequency tolerance:  496 ppm
pps frequency:        34.122 ppm
pps stability:        0.012 ppm
pps jitter:           1.68e-06 s
calibration interval: 256 s
calibration cycles:   38
jitter exceeded:      79
stability exceeded:   1
calibration errors:   0




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