[time-nuts] AN/URQ-13 question How long

[Attila Kinali]

On Thu, 4 Mar 2021 08:59:10 -0500
paul swed <paulswedb at gmail.com> wrote:

> How stable? No published specs for this unit. But the older AN/URQ-10 was 5
> E -10 and I have set the unit to 5.7 E -11. But it is still moving around
> and just starting to document that. Really do not have a trend line yet.
> Hope that helps.

Maybe as a point of reference: The OCXO in my SR620 flutters around
10MHz with a few parts in 1e-10 in the course of a few weeks/months.
It is an older model, judging from the oxidation on the BNC connectors
and has been continuously running for at least 2 years.

Unfortunately, I am not logging the frequency of the SR620, so I cannot
make any more precise statements. (I really need to build some rig where
I can measure lots of 10MHz sources in continuously...)

			Attila Kinali

-- 
In science if you know what you are doing you should not be doing it.
In engineering if you do not know what you are doing you should not be doing it.
        -- Richard W. Hamming, The Art of Doing Science and Engineering