[time-nuts] Caveats on Allan Deviation with ultra stable oscillators

Gerhard Hoffmann dk4xp at arcor.de
Thu May 29 12:46:37 EDT 2014


Am 29.05.2014 18:15, schrieb cdelect at juno.com:
> On these latest oscillators at the longer Tau (>100sec.)
> the Quartz versus Quartz data shows much better performance
> than the Quartz versus Maser!

Could it be that they try to lock to each other,
given enough time?

regards, Gerhard
>
> What is happening (I think) in this case is that both Quartz units
> have exceptionally low and similar ageing.
> This similar ageing rate masks the true stability performance at longer
> Tau.
> The Maser data (with no effective ageing in this case)
> reveals the true stability at the longer Tau!
>




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