[ntp:questions] ntp-4.2.6p5 on Win 7 x64

Martin Burnicki martin.burnicki at meinberg.de
Wed Jul 16 10:46:38 UTC 2014


Nick wrote:
> This machine dual boots Mint 17 x64 and Win 7 SP1 x64.
>
> I have set the hardware clock to UTC.
>
> Mint 17 and Win 7 run on local time.
>
> I need reasonable time sync for WSJTX < 1 second.
>
> On Mint 17 ntp from the repo works well with offsets in the low
> tens of milliseconds, sometimes < 10ms.
>
> On Win 7 I have installed ntp-4.2.6p5 at spider-man-2-win32-setup.exe.
>
> This does not seem to work properly.
>
> The jitter and offset 'diverge'...
>
> C:\Users\nick>ntpq -p
>       remote           refid      st t when poll reach   delay   offset
> jitter
> ==============================================================================
> +head1.mirror.ca 195.66.241.2     2 u   19   64   77   33.361  1150.37
> 398.012
> +rad.22pf.org    164.47.15.177    3 u   10   64  377   30.518  1146.44
> 381.704
> +ntp.oceanmediag 140.203.204.77   2 u   13   64   77  138.709  1201.64
> 438.477
> *ntp0.sccis.net  193.62.22.74     2 u   18   64   77   36.415  1147.99
> 385.595
>
> These are not the worst offsets I've seen; 3 seconds is not unusual.
>
> Restarting the service 'fixes' it for a few minutes, then it all begins to
> 'diverge' again.

This is not related to whether the RTC runs on UTC or local time.

Please see an earlier post from me
http://lists.ntp.org/pipermail/questions/2013-November/036676.html

which describes why (and how) you should upgrade the NTP version, and 
why (and how) you should use different minpoll/maxpoll values.

Please let us know if my suggestions fix your problem.

> Using the default ntp.conf except for "pool uk.pool.ntp.org iburst".

minpoll 6 and maxpoll 6 or maxpoll 7, plus an upgrade of the NTP 
binaries on your Windows machine.


Martin
-- 
Martin Burnicki

Meinberg Funkuhren
Bad Pyrmont
Germany



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