"dicky" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> If it is time interval that you need to calibrate, and not time of day,
> then I recommend that you get a GPS synchronisation reference receiver.
> The accuracy of these sync sources are traceable to NIST, and are only one
> step down from a caesium reference oscillator.
> A caesium oscillator would cost you about $45k USD, a telco spec 10MHz GPS
> derived oscillator can be bought for around $3k USD.
GPS devices with time of day traceable to NIST that can give you one
microsecond accuracy are available for about $150 or less. With a dedicated
Pentium PC, you can get a timestamper that's accurate to 5 microseconds or
so with very little difficulty.
DS
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