[time-nuts] Allan Variance versus Allan Deviation
Martyn Smith
martyn at ptsyst.com
Mon Mar 28 11:24:08 UTC 2011
Hello,
I'm trying to compare the stability specifications of two oscillators.
The first spec is 2 x 10E-11 Allan Variance.
The second spec is 3 x 10E-11 Allan Deviation.
As Allan deviation (ADEV), is the square root of Allan variance, I thought
the first spec is the better of the two, but a collegue disagrees, saying
3x10E-11 Allan Deviation is a better spec than 2 x 10E-11 Allan Variance.
I'm sure the million experts at there will give me the correct answer
Regards
Steve Jones
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