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

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Apr 10 02:13:27 EDT 2005

In message <425854CA.2090301 at pacific.net>, Brooke Clarke writes:
>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.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
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