[ntp:questions] Trying to use Dimension 4 time keeper

David Woolley david at ex.djwhome.demon.invalid
Sun Sep 8 20:16:38 UTC 2013

On 08/09/13 20:46, W. eWatson wrote:

> What about the above?  Does the user set the drift, and, if 24.793 is in
> seconds, why so big?

The user doesn't set it (although there are unusual cases where that 
might be useful.  It is set every hour when ntpd is synchronised.  It is 
used to speed up the frequency compensation on a restart.

It is not a number of seconds. It is dimensionless, being the frequency 
error in parts per million.

Its that big because PC manufacturers use cheap crystals.

>  >
>  > What time accuracy do you need?
> 0.1 seconds.
That's not onerous at all. ntpd will actually start taking drastic 
action when the measured error reaches 0.128 seconds.  W32TIME should 
have no problem achieving that, even with the old version on XP, once 
you reduce the poll interval to hours rather than the default days.

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