[time-nuts] 5061 Cs frequency shift with long time constant?

[Poul-Henning Kamp]

In message <4252B46E.3010509 at pacific.net>, Brooke Clarke writes:

>> I got my 5061A trimmed to the point where a 5 day run against GPS 
>> showed an offset of less than 1x10e-13.  I then switched the unit into 
>> the long time constant mode and now see that the offset (over 36 
>> hours) is -1.7x10e-12.  Nothing else in the setup has changed.

Yes, very likely.  The leak-current in the integrating capacitor cannot
be fully ignored at this level.

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