[time-nuts] Frequency error -> Parabolic Time Error?

[Poul-Henning Kamp]

In message <425854CA.2090301 at pacific.net>, Brooke Clarke writes:
>Hi:
>
>Suppose that my reference oscillator is offset from 10.0 MHz by some 
>small amount.  If I plot the time interval between the reference 
>oscillator and a GPS 1 PPS what will the plot look like over a long time 
>period, a parabola?

No, that indicates frequency drift.

A constant frequency offset gives a linear phase error curve.

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