[time-nuts] Modified Allan Deviation and counter averaging
Poul-Henning Kamp
phk at phk.freebsd.dk
Sat Aug 1 04:58:03 EDT 2015
--------
In message <55BC202F.6060509 at gmail.com>, Daniel Mendes writes:
>Can someone explain in very simple terms what this graph means?
>
>My current interpretation is as following:
>
>"For a 100Hz input, if you look to your signal in 0.1s intervals,
>thereĀ“s about 1.0e-11 frequency error on average (RMS average?)"
Close: To a first approximation MVAR is the standard-deviation of
the frequency, as a function of the time-interval you measure the
frequency over.
--
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
Never attribute to malice what can adequately be explained by incompetence.
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