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

[Richard (Rick) Karlquist]

The ADEV of the 5071 follows the typical curve of
improving at a constant rate vs increasing Tau
until it levels out due to limiting by flicker.  AFAIK,
this flicker noise never turns back up.  There is
no observable aging either.  Nor are there any
observable environmental effects.

The 5071's traditionally counted for 85% of the
weight in the TAI weighted average.  You might as
well start by asking what is the long term stability
of the TAI.

Just based on what you are saying, your client reminds
me of many consulting clients I have had who started
out asking the wrong question.  I usually responded,
not by attempting to answer the question, but rather
explain why it was the wrong question and then proceed
to figuring out the right question.  Just a comment;
maybe that is not what is going on in your case.

Rick N6RK



On 3/25/2021 9:29 AM, Attila Kinali 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
>