[time-nuts] Re: 5061B ADEV curves and questions

[Poul-Henning Kamp]

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AC0XU (Jim) via time-nuts writes:

> What I am wondering about is why the unit can't do better than it does up to 300 seconds with the cesium beam turned on. Actually, the same question applies to all of these units. Ideas?

The PLL/LF/Mod/Demod circuitry in the 5061 is designed to handle the full envelope of the specification, which includes horrors like "30G 11ms" (Table 1-1).

(That sounds like "submarine + near-miss depth-charge" to me ?)

To stay locked through that, the PLL needs to be pretty insistent.

Both of my 5061As had a "TIME CONSTANT" switch, where you could select either "1s" or "60s" "loop time", and even th 60s setting was clearly too trigger-happy in my lab.  (I think this switch disappeared in later models ?)

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