Magnus Danielson wrote:
On 10/28/2012 01:13 AM, Chuck Harris wrote:
Two things come to mind:
1) is this the high performance tube? Perhaps it has a different
Zeeman frequency than the standard tube?
2) a non HP replacement tube? FTS Cs beam tubes are way different
Zeeman frequencies than HP.
A high performance tube should give you better signal to noise.
A non HP tube might give you a somewhat different C-field setting for same
center
lock-in.
The FTS tubes in my 4050 have a Zeeman frequency of around 43KHz, which if
my estimate is right is about 10KHz different from the HP Zeeman frequency
of around 53KHz. And as I recall, the little HP submarine C-Beam has yet
another Zeeman frequency, but I can't dig up its manual at the moment.
AFAIK, the Zeeman frequency is very much dependent on the architecture of
the particular physics package.
-Chuck Harris
The physics of Cs-133 is still the same, and the RF-chain is still the same. If
not,
someone has to teach me something new, or at least inform me why the high
performance
tubes are so much different.
Cheers,
Magnus
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