[ntp:questions] Tiime Sync solution

Bjorn Gabrielsson bg at lysator.liu.se
Tue May 31 20:11:25 UTC 2005


Brad Knowles <brad at stop.mail-abuse.org> writes:


> 	However, to get down to 1ms or below, you're going to have to
> do a lot of hard work, and the most important parts are choosing the
> right hardware platform, choosing the right OS on which to serve that
> data, and choosing the right refclocks (e.g., a good GPS device which
> is used to discipline a thermally stabilized oscillator).

Cannot remember reading about a GPS receiver with 1PPS output
specified worse than 1us. Get a reciever with a 1PPS, and you are home
free! 

> 
> 	With lots of hard work, and some luck in finding used Rubidium
> clocks at reasonable prices, Poul-Henning Kamp was able to put
> together some devices that achieved sub-millisecond accuracy.  But
> that's a lot of hard work.

I would say phk did sub-microsecond. 

--
        Björn



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