[ntp:questions] Frequency Offset

unruh unruh at invalid.ca
Thu Feb 23 21:29:54 UTC 2012


On 2012-02-23, Alby VA <albyva at empire.org> wrote:
>   Is there anything wrong with a frequency offset that averages around
> -24 to -25 ?
> If so, what can I do to correct the problem?

No, that is a very typical figure for the frequency offset. Remember
that the crystals used to control the timing in computers are not
supposed to be terribly accurate. (They are chosen to be cheap, not
great).
It is because such frequency offsets exist that ntp was invented to
correct.


>
>
>
> NOTES:
> --
> godzilla#
> godzilla# ntpq -c rl
> assID=0 status=0115 leap_none, sync_atomic, 1 event,
> event_clock_reset,
> version="ntpd 4.2.6p5 at 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=0.283, refid=PPS,
> reftime=d2f11e0e.cf0562f5  Thu, Feb 23 2012 15:20:30.808,
> clock=d2f11e11.2b1bdc55  Thu, Feb 23 2012 15:20:33.168, peer=30677,
> tc=4, mintc=3, offset=0.018, frequency=-24.634, sys_jitter=0.002,
> clk_jitter=0.002, clk_wander=0.000
> godzilla#
>



More information about the questions mailing list