[time-nuts] Re: Long term ADEV of 5071

[Michael Wouters]

Hello Attila

I realised that I had recently made a plot of the kind you were after
recently for our quality system documentation.

The plot is for a standard tube. The UTC plots are from CircularT. The
local Cs-Cs plots are for a local comparison of the UTC clock with another
Cs; I have divided by sqrt(2). I have used about 4 years of data. The Cs is
free running during this time.

I don’t know why the UTC data seems to go lower - perhaps there’s some
averaging in Circular T. Nor do I know why it starts to walk off. The utc
curve starts to walk off at one year which may mean something.

Cheers
Michael





On Fri, 26 Mar 2021 at 3:34 am, Attila Kinali <attila at kinali.ch> wrote:

> Moin,
>
> Does someone of those who own a 5071 have long-term ADEV data?
> I'm looking for multi-year data. While there are plenty of ADEV
> plots online, most of them stop at 1Ms or even at 100ks.
>
> Background: I'm involved in a project where long term frequency
> stability is important. And I need some rule of thumb to evaluate
> whether what we are trying to do makes sense or not.
>
> Thanks in advance!
>
>                         Attila Kinali
>
> --
> The driving force behind research is the question: "Why?"
> There are things we don't understand and things we always
> wonder about. And that's why we do research.
>                 -- Kobayashi Makoto
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