[time-nuts] NTP for 64 bit windows

David J Taylor david-taylor at blueyonder.co.uk
Tue Jan 17 06:20:15 EST 2012

> Windows has long had its own built-in NTP client. All you have to do
> is use that. You can change the parameters as needed (I always point
> the built-in client to my local NTP server and set the update
> frequency to once every few minutes, given the poor accuracy of PC
> clocks).
> --
> Anthony


The built-in client does not support NTP fully - for example, reference 
clocks and the management functions.  Tell me how accurate it is, for 
example.  It doesn't respond to a standard:

  ntpq -p

command - you need real NTP for that.  My advice is to forget the 
Microsoft built-in client.  Running updates more frequently than is 
necessary is not particularly server friendly.  Properly configured, read 
NTP can be within milliseconds on Windows, and within a couple of hundred 
microseconds if you have a PPS source.  Using interpolation, you can get 
far more precision out of a PC clock:


SatSignal software - quality software written to your requirements
Web:  http://www.satsignal.eu
Email:  david-taylor at blueyonder.co.uk 

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