[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
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