[ntp:questions] how to have offset < 1ms

John Hasler jhasler at newsguy.com
Thu Apr 15 00:11:04 UTC 2010

lhommedumatch writes:
> I think that the reason why we use an external clock is to avoid loose
> of signal GPS.  Apparently (discussion with crew) it happens and it
> depends of the weather, the position, the vessel and some unknown
> reasons.

But that is what the OCXO in the ACEB box is for.  If you had it hooked
up to a GPS antenna it would use the GPS signal to discipline the
crystal so that when the GPS signal went out for a few hours your time
would only drift off by a few microseconds.
John Hasler 
jhasler at newsguy.com
Dancing Horse Hill
Elmwood, WI USA

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