[ntp:questions] stupid, simple question about precision

David J Taylor david-taylor at blueyonder.co.not-this-bit.nor-this-part.uk
Mon Nov 20 19:49:43 UTC 2006


Simple Simon wrote:
[]
> My understanding is the best accuracy I might get, on a generic PC
> clock, is about 0.050 ms--and that's with SSP and the kernel clock.

My really old 133MHz Pentium PC with FreeBSD and a PPS source (with an 
incomplete view of the sky) does a little better than than.  I'm sure more 
modern hardware and a better-positioned GPS antenna would do substantially 
better.

  http://www.david-taylor.myby.co.uk/mrtg/pixie_ntp.html

  http://www.david-taylor.myby.co.uk/ntp/FreeBSD-GPS-PPS.htm

Cheers,
David 





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