[ntp:questions] Fwd: Two PPS signals, one declared as falseticker

Nickolay Orekhov nowhere at mail.ru
Mon Oct 17 12:35:55 UTC 2011


Hello!

I have the following configuration:

=================================================================

# drift frequency file
driftfile  /fs/sd/etc/ntp.drift

# midist  : increased minimal distance for PPS reference clocks ( default
0.001s )
tos mindist 0.032

# panic   : zero to accept initial big shifts ( default 1000s )
# stepout : how many seconds wait before stepping to spike ( default 900s )
# step    : step threshold in seconds ( default 0.128s )
tinker panic 0 stepout 60

# disable authentification for broadcast network
disable auth

# PPS reference clock
server 127.127.22.0 maxpoll 3
fudge 127.127.22.0 refid PPSI

# PPS reference clock
server 127.127.22.1 maxpoll 3
fudge 127.127.22.1 refid PPSE

# NMEA reference clock
server 127.127.20.0 mode 80 prefer maxpoll 3
fudge 127.127.20.0 refid NMEA stratum 8 time2 0.018

# External servers
server 10.1.1.252 prefer iburst maxpoll 3
broadcastclient

=================================================

Here's the output from ntpq:

     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
xPPS(0)          .PPSI.           0 l    1    8  377    0.000    0.306
0.008
oPPS(1)          .PPSE.           0 l    3    8  377    0.000    0.230
0.008
xGPS_NMEA(0)     .NMEA.           8 l    1    8  377    0.000  -61.470
5.066
*10.1.1.252      172.100.100.2    3 u    1    8  377    0.854   -0.009
2.128

Please, could you advice me, why first PPS declared as falseticker ?


Thanks, Nick


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