On 2011-11-22, Nickolay Orekhov <[email protected]> wrote: > Hello, all! > > I have the following configuration on my client: > 1 PPS signal delivered from some GPS receiver and 1 NTP server > > Here's what I've got: > QNX Neutrino (localhost) (ttyp0) > > ntpq> pe > remote refid st t when poll reach delay offset > jitter >============================================================================== > xPPS(1) .PPSE. 0 l 5 8 377 0.000 -356.53 > 1.699 > x10.0.0.197 .GPS. 1 u 4 8 377 0.316 84647.8 > 2.052 > 10.0.0.198 .STEP. 16 u - 8 0 0.000 0.000 > 0.000 > ntpq> > > Here's my config: > > tos mindist 0.032 > tinker panic 0 stepout 60 > > # PPS reference clock > server 127.127.22.1 maxpoll 3 > fudge 127.127.22.1 refid PPSE > > # External servers > server 10.0.0.197 prefer iburst maxpoll 3 > server 10.0.0.198 iburst maxpoll 3 > > Ok, I see, they are both falsetickers because of great difference between > them. But why the difference is so great? > I think the difference between PPS signal and some other signal can't be > more than 1 second, isn't it?
PPS will give you accurate nanoseconds, but horrible seconds. Ie you in general need something else to determine the seconds. The more relevant question is why is 198 not working. > > May be I should increase tos mindist to be slightly greater than 1 second? > > Thanks, Nick _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
