On Mar 12, 9:17 pm, Alby VA <alb...@empire.org> wrote: > On Mar 12, 7:21 pm, unruh <un...@invalid.ca> wrote: > > > > > > > > > > > On 2012-03-12, Alby VA <alb...@empire.org> wrote: > > > > If your offset is between -400 to +600 ?s (microseconds), would you > > > consider that Good, Bad, or Average? > > > If it is less than Good, could something be tweaked to improve it? > > > ntp.conf changes? cable changes? > > > or I'm just SOL? > > > What operating system? What is your server (network, wristwatch, gps, > > pps?) For PPS you should be able to get +- 1us. for a server in Moscow, > > +- 1ms. > > > > Stats > > > -------- > > >http://godzilla.empire.org/ > > >http://www.pool.ntp.org/scores/63.251.89.141 > > > > assID=0 status=0115 leap_none, sync_atomic, 1 event, > > > event_clock_reset, > > > version="ntpd 4.2....@1.2349-o Mon Feb 20 22:00:33 UTC 2012 (1)", > > > processor="amd64", system="FreeBSD/9.0-RELEASE", leap=00, stratum=1, > > > precision=-19, rootdelay=0.000, rootdisp=1.082, refid=PPS, > > > reftime=d308de90.7e20860b Mon, Mar 12 2012 16:44:00.492, > > > clock=d308dec4.6a2aacac Mon, Mar 12 2012 16:44:52.414, peer=9406, > > > tc=4, > > > mintc=3, offset=0.081, frequency=-24.987, sys_jitter=6.771, > > > clk_jitter=0.003, clk_wander=0.004 > > The Stratum 0 devices is SureGPS and its running on FreeBSD as the OS > and AMD for the chip. > > FreeBSD godzilla.empire.org 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue > Feb 21 22:13:35 EST 2012 amd64
My whole setup isn't anything special. SureGPS is modified so you get PPS. RS232 cable to COM1 on a FreeBSD box. USB providing power. And several NIST/USNO servers in ntp.conf for reference. remote refid st t when poll reach delay offset jitter ============================================================================== ntp2.usno.navy. .USNO. 1 u 11h 128 0 21.392 11.022 0.000 -ntp0.usno.navy. .USNO. 1 u 512 128 370 25.747 -0.242 3.378 +ntp1.usno.navy. .USNO. 1 u 51 128 377 30.361 -1.445 2.473 -time-a.nist.gov .ACTS. 1 u 136 128 336 19.894 0.582 5.715 +time-b.nist.gov .ACTS. 1 u 64 128 57 19.100 -0.948 2.129 oPPS(0) .PPS. 0 l 13 16 377 0.000 0.502 0.153 *GPS_NMEA(0) .GPSb. 0 l 12 16 377 0.000 -38.705 13.177 _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions