[ntp:questions] PPS sync: astonishing offset

Fabien Ribes FribesAT at CapGeminiDOT.fr
Mon Oct 6 14:53:30 UTC 2003


hi all,

On a router synchronized to a Trimble GPS receiver I'm getting the 
following results with ntpq:

Fri Oct  3 02:24:43 GMT 2003
remote           refid      st t when poll reach   delay   offset   disp
=========================================================================
+127.127.29.0    .GPS.       0 l   20   32  377     0.00   -0.065   0.49
o127.127.22.0    .PPS.       0 l    -   16  377     0.00   -0.209   0.24

which is OK for me, but one minute later, I get :

Fri Oct  3 02:25:59 GMT 2003
remote           refid     st t when poll reach   delay   offset   disp
=========================================================================
+127.127.29.0    .GPS.      0 l    2   32  377     0.00   -3.713    0.47
o127.127.22.0    .PPS.      0 l    2   16  377     0.00   -4.459    0.24

which makes me a bit puzzled, as many other equipments in the same 
configuration are very stable. Any idea ?




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