[ntp:questions] Offset Average (Normal)?

David J Taylor david-taylor at blueyonder.co.uk.invalid
Tue Mar 13 05:54:58 UTC 2012


"Alby VA" <albyva at empire.org> wrote in message 
news:7824f31d-b72c-44eb-9eeb-b219a7543db3 at gr6g2000vbb.googlegroups.com...
[]
> 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

As Chris commented, you should maybe be using a single driver - here's 
mine for a GPS 18 LVC (which should be similar apart from the baud rate):

==============
oGPS_NMEA(1)     .PPS.            0 l   16   16  377    0.000    0.004 
0.002
+feenix          .PPS.            1 u   29   32  377    0.267   -0.027 
0.029
+stamsund        .PPS.            1 u   13   32  377    0.246   -0.028 
0.035
-time.hilo.net   130.88.212.143   3 u   67 1024  377   21.717    2.509 
1.349
-server0.terrybu 140.203.204.77   2 u 1023 1024  377   23.783    3.814 
4.331
+xinnaeus.bin.ed 129.215.64.32    2 u  677 1024  377   30.284    1.405 
0.739

and the configuration:

driftfile /var/db/ntp.drift
#
server  127.127.20.1    mode 0  minpoll 4 maxpoll 4  prefer
fudge   127.127.20.1    flag1 1 flag3 1 refid PPS
#
server 0.uk.pool.ntp.org iburst minpoll 10 maxpoll 10
server 1.uk.pool.ntp.org iburst minpoll 10 maxpoll 10
server 2.uk.pool.ntp.org iburst minpoll 10 maxpoll 10
#
leapfile /root/ntp/leap-seconds.3535142400

(which has "just grown", so may not reflect current best practice).

Cheers,
David 



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