[time-nuts] What does determine the short term stability of an Rb vapor cell standard?

[Attila Kinali]

On Sun, 25 Mar 2018 15:28:10 -0400
Bob kb8tq <kb8tq at n1k.org> wrote:

> Well, magnetic shielding, temperature coupling between cells, photo detector
> noise floor, phase noise of the various signals, basic stability of the “ocxo” and 
> I’m sure a few other issues as well……

The effects of those seem not to be that big. If you look at the
phase noise plot of the measurements that John Miles did [1],
it looks like the PRS10 comes very close to the 5065 for everything
shorter than 1s. Which suggests, that they might have missed something
in the control loop or set its constant too long.

			Attila Kinali


[1] http://www.ke5fx.com/rb.htm

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