[time-nuts] Frequency error -> Parabolic Time Error?
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
FreeBSD committer | BSD since 4.3-tahoe
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