[ntp:questions] problems with pps and meinberg gps 167
Nec
nec at kloserver.de
Fri Nov 21 18:17:30 UTC 2003
Hi,
i use a Meinberg GSP 167 with PPS but the PPS-Signal is not reachable
although the status-bit PPSTIME is set.
I built a ttl-to-rs232 gage converter (the function of it is correct ->
inverst a +5V to -8.5V and -5V to +8.5V for rs232) and start the
synchronisation and all the time this output is in ntp.log:
21 Nov 18:38:07 ntpd[493]: time reset +0.196016 s
21 Nov 18:38:07 ntpd[493]: system event 'event_clock_reset' (0x05) tatus
'leap_none, sync_unspec, 15 events, event_peer/strat_chg' (0xf4)
21 Nov 18:38:07 ntpd[493]: system event 'event_peer/strat_chg' (0x04)
status 'leap_none, sync_unspec, 15 events, event_clock_reset' (0xf5)
21 Nov 18:38:07 ntpd[493]: peer PPS(0) event 'event_reach' (0x84) status
'unreach, conf, 15 events, event_reach' (0x80f4)
21 Nov 18:39:12 ntpd[493]: peer GENERIC(0) event 'event_reach' (0x84)
status 'unreach, conf, 13 events, event_reach' (0x80d4)
21 Nov 18:40:06 ntpd[493]: pps sync disabled
21 Nov 18:42:25 ntpd[493]: synchronized to GENERIC(0), stratum=0
21 Nov 18:44:25 ntpd[493]: pps sync disabled
21 Nov 18:46:40 ntpd[493]: peer PPS(0) event 'event_unreach' (0x83)
status 'unreach, conf, 15 events, event_unreach' (0x80f3)
21 Nov 18:53:07 ntpd[493]: time reset +0.196371 s
21 Nov 18:53:07 ntpd[493]: system event 'event_clock_reset' (0x05)
status 'leap_none, sync_unspec, 15 events, event_peer/strat_chg' (0xf4)
21 Nov 18:53:07 ntpd[493]: system event 'event_peer/strat_chg' (0x04)
status 'leap_none, sync_unspec, 15 events, event_clock_reset' (0xf5)
21 Nov 18:53:07 ntpd[493]: peer PPS(0) event 'event_reach' (0x84) status
'unreach, conf, 15 events, event_reach' (0x80f4)
21 Nov 18:53:50 ntpd[493]: offset 0.000000 sec freq 195.647 ppm error
0.000001 poll 4
always comes:
- pps sync disabled
- peer PPS(0) event 'event_unreach'
- system event 'event_clock_reset'
- ...
- peer PPS(0) event 'event_reach'
ntptime output (PPSSIGNAL is set):
ntp_gettime() returns code 0 (OK)
time c368d525.da26804c Fri, Nov 21 2003 19:17:09.852, (.852150688),
maximum error 6587 us, estimated error 2035 us, TAI offset -1073742424
ntp_adjtime() returns code 0 (OK)
modes 0x0 (),
offset -0.096 us, frequency -22.314 ppm, interval 64 s,
maximum error 6587 us, estimated error 2035 us,
status 0x2107 (PLL,PPSFREQ,PPSTIME,PPSSIGNAL,NANO),
time constant 6, precision 2.688 us, tolerance 496 ppm,
pps frequency -22.314 ppm, stability 0.174 ppm, jitter 0.377 us,
intervals 401, jitter exceeded 121, stability exceeded 38, errors 0.
my config:
# Meinberg GPS 167
server 127.127.8.0 mode 7 prefer
fudge 127.127.8.0 stratum 0 time1 0.0042
# pps device
server 127.127.22.0
fudge 127.127.22.0 flag3 1
# local clock
#server 127.127.1.0
#fudge 127.127.1.0
# various options
enable stats
enable pps
#server 195.72.96.5
statsdir /var/log/ntplog
driftfile /etc/ntp.drift
logconfig =all
logfile /var/log/ntp.log
statistics loopstats clockstats
filegen peerstats file peerstats type day enable
filegen loopstats file loopstats type day enable
filegen clockstats file clockstats type day enable
ntpq -p:
remote refid st t when poll reach delay offset jitter
==============================================================================
*GENERIC(0) .GPS. 0 l 7 64 377 0.000 191.405 4.870
PPS(0) .PPS. 0 l 711 64 0 0.000 0.000 4000.00
I don't have any idea anymore.. :(
maybe you have one..
thx for reading!
Markus
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