On 2007-11-19, Chris Adams <[EMAIL PROTECTED]> wrote: > Once upon a time, Steve Kostecke <[EMAIL PROTECTED]> said: >>What does ntpq -p show? > > $ ntpq -p > remote refid st t when poll reach delay offset jitter >=================================================================== <snip> > xGPS_NMEA(0) .GPS. 0 l 11 64 377 0.000 143.198 56.164 > *SHM(0) .SHM. 0 l 2 16 377 0.000 -0.195 0.541
Compare your PPS over USB with PPS on a real serial port: rackety.udel.edu remote refid st t when poll reach delay offset jitter =================================================================== +SPECTRACOM(1) .GPS1. 0 l 21 64 377 0.000 0.004 0.004 oPPS(0) .PPS. 0 l 5 16 377 0.000 0.002 0.004 The GPS-18LVC connected to a real serial port on my Soekris would show jitter of 0.008 and a typical daily peersum (with peer.awk) looked like: ident cnt mean rms max delay dist disp ============================================================ 127.127.20.0 5235 0.000 0.002 0.014 0.000 0.270 0.248 -- Steve Kostecke <[EMAIL PROTECTED]> NTP Public Services Project - http://support.ntp.org/ _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
