[time-nuts] Fast frequency counting question

Tom Van Baak tvb at LeapSecond.com
Sun May 4 20:18:03 EDT 2008

> Hi all,
> We have a problem at work where one of our engineers needs to measure
> the start-up chirp in an oscillator destined for a GPS application.
> We are looking for ppb level frequency resolution with sample periods
> around 10 - 20us (yes, that's us, not ms!). The chirp is all over well
> inside 1ms.

Would the end-user allow you to gate the oscillator output
for the first 1 ms thereby avoiding the chirp you're trying to


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