[time-nuts] Quick Allan deviation measures

[Tom Van Baak]

> See how the GPS diciplined 10811 with extra oven keeps it track above that
of
> a normal 10811 sitting in a unit. Notice also that the Cx1 had been
powered
> only for an hour instead of over 24 hours.

Since you're only looking at tau of 0.001 to 1 second
things like warm-up time and ovens have little or no
effect.

> Infact, the GPS is worst of all these sources!!!
>
> I am quite sure that a 10 s measure would should the GPS even more
> infavourable.

Correct (as it should) and even worse at 100 s and maybe
even 1000 s. But beyond an hour of averaging time your
Z3801A will start to shine. See typical Z3801A ADEV plot:

http://www.leapsecond.com/museum/z3801a/log8286v.gif

/tvb