[ntp:questions] Best solution for millisecond accuracy
hal-usenet at ip-64-139-1-69.sjc.megapath.net
Sat Mar 24 21:54:58 UTC 2007
>However, for a high percentile of system times being within 1ms of the
>reference, he probably should be using PPS timing with equal length
>cables between the timing source and all the machines.
Don't worry about the cable length until you get down to the microseconds.
The speed of light is 1 ft per nanosecond. That's in vacuum. It's slower
in cable. 1/2 or 3/4 is a good guess.
So 50 ft of cable is 100 ns or 1/10 of a microsecond or
1/10000 of a millisecond.
These are my opinions, not necessarily my employer's. I hate spam.
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