Hi,
So it seem that after a while NTP reject my GPS and PPS input for time
keeping. The only source for time sync is the GPS, I cannot use other
devices and/or remote servers.
I had to add support for my receiver (Trimble Resolution SMT) and
communication wise seems to communicate ok. The pps is also working.
Can anyone make sense of the output from ntpq -p and as cmd from ntpq
and maybe help in understanding whats happening.
if there is any extra info needed please let me know
Thanks
my config is:
driftfile /etc/ntp.drift
server 127.127.29.1 mode 5 iburst prefer
server 127.127.22.0
#I tried with and without delay
#packet delay
#fudge 127.127.29.1 time1 0.020
At start
ntpq> as
ind assid status conf reach auth condition last_event cnt
===========================================================
1 54000 802b yes no none reject clock_alarm 2
2 54001 8011 yes no none reject mobilize 1
ntpq> as
ind assid status conf reach auth condition last_event cnt
===========================================================
1 54000 802b yes no none reject clock_alarm 2
2 54001 8011 yes no none reject mobilize 1
ntpq> as
ind assid status conf reach auth condition last_event cnt
===========================================================
1 54000 9654 yes yes none sys.peer reachable 5
2 54001 8011 yes no none reject mobilize 1
/ # ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 8 16 377 0.000 -0.538
0.141
PPS(0) .PPS. 0 l - 64 0 0.000
0.000 0.000
>> Note the offset getting larger...
/ # ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 1 16 377 0.000 -0.838
0.233
PPS(0) .PPS. 0 l - 64 0 0.000
0.000 0.000
/ # ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 15 16 377 0.000 -0.931
0.149
PPS(0) .PPS. 0 l - 64 0 0.000
0.000 0.000
/ # ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 1 16 377 0.000 -1.582
0.148
PPS(0) .PPS. 0 l - 64 0 0.000
0.000 0.000
/ # ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 5 16 377 0.000 -1.524
0.544
xPPS(0) .PPS. 0 l 37 64 1 0.000 -114.56
0.002
/ # ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 14 16 377 0.000 -1.431
0.606
xPPS(0) .PPS. 0 l 62 64 1 0.000 -114.56
0.002
/ # ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 7 32 377 0.000 -2.086
0.438
xPPS(0) .PPS. 0 l 7 64 3 0.000 -112.39
2.171
/ # ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 14 32 377 0.000 -2.086
0.438
xPPS(0) .PPS. 0 l 14 64 3 0.000 -112.39
2.171
/ # cat /etc/ntp.drift
2.203
/ # ntpq
ntpq> pe
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 13 32 377 0.000 -1.679
0.360
xPPS(0) .PPS. 0 l 13 64 17 0.000 -109.26
3.655
ntpq> as
ind assid status conf reach auth condition last_event cnt
===========================================================
1 54000 9654 yes yes none sys.peer reachable 5
2 54001 9124 yes yes none falsetick reachable 2
ntpq> pe
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 8 32 377 0.000 -0.690
0.885
xPPS(0) .PPS. 0 l 40 64 37 0.000 -107.76
4.440
ntpq> as
ind assid status conf reach auth condition last_event cnt
===========================================================
1 54000 9654 yes yes none sys.peer reachable 5
2 54001 9124 yes yes none falsetick reachable 2
ntpq> as
ind assid status conf reach auth condition last_event cnt
===========================================================
1 54000 9654 yes yes none sys.peer reachable 5
2 54001 9124 yes yes none falsetick reachable 2
ntpq> pe
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 2 32 377 0.000 -1.317
0.413
xPPS(0) .PPS. 0 l 2 64 77 0.000 -106.28
5.237
ntpq> as
ind assid status conf reach auth condition last_event cnt
===========================================================
1 54000 9654 yes yes none sys.peer reachable 5
2 54001 9124 yes yes none falsetick reachable 2
ntpq> pe
remote refid st t when poll reach delay offset
jitter
==============================================================================
*GPS_PALISADE(1) .GPS. 0 l 5 32 377 0.000 -0.564
0.828
xPPS(0) .PPS. 0 l 37 64 77 0.000 -106.28
5.237
ntpq> as
ind assid status conf reach auth condition last_event cnt
===========================================================
1 54000 9154 yes yes none falsetick reachable 5
2 54001 9124 yes yes none falsetick reachable 2
ntpq> pe
remote refid st t when poll reach delay offset
jitter
==============================================================================
xGPS_PALISADE(1) .GPS. 0 l 8 32 377 0.000 -1.193
0.409
xPPS(0) .PPS. 0 l 8 64 177 0.000 -104.82
6.030
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