[time-nuts] 5061A and Zeeman freq question

wje wje at quackers.net
Sat Jul 19 09:48:34 EDT 2008

My understanding is that the precise cesium hyperfine transition energy, 
and hence microwave frequency, is dependent upon the applied C-field, 
and the field setting to select a particular transition is the same for 
all clocks (which is why these are primary standards). The C-field is 
set by applying an LF signal at the correct frequency to cause Zeeman 
splitting, and optimizing the C-field to peak the splitting.

So, shouldn't the Zeeman frequency always be 42.82 Khz, which is what 
I've seen in every reference? But, my 5061A with a high-performance tube 
has a sticker that says 'Zeeman freq 53.53 Khz'. I can indeed get Zeeman 
splitting at that frequency with a C-field setting of 3.45, but is this 
correct? If so, why? (BTW - I don't seem to be able to get any splitting 
at 42.82 Khz)


Bill Ezell
They said 'Windows or better'
so I used Linux.

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