[time-nuts] Experiments in NTP performance (Watson Ladd)

[Chris Quayle]

On 02/07/20 17:00, time-nuts-request at lists.febo.com wrote:
> Experiments in NTP performance (Watson Ladd)

Hi,

I may have something to contribute to this, Built an
experimental system last year. Two or three surplus spares or repair
grade and refurbished time servers on a separate subnet, interrogated
by a Mini ITx PC box  running FreeBSD / ntpd. 1 PPS support via
the serial port dcd line. Registered with ntp.org, but not online
yet as still confirming system is rock solid. On a ups and has been
running now for months. Typical output from ntpq -p is:

root at ntp-host:/etc # ntpq -p
      remote       refid st t when poll reach   delay   offset  jitter
=====================================================================
oPPS(0)          .PPS.   0 l    2    8  377    0.000    0.001   0.001
*192.9.200.168   .GPS.   1 u   45   64  377    0.189   -0.010   0.024
+192.9.200.169   .GPS.   1 u   19   64  377    0.378   -0.012   0.037
-ntp0.uk.uu.net  .GPS.   1 u   42   64  377   16.940    0.352   0.129

Two local sources and one external, for a sanity check...

Regards,

Chris