[time-nuts] Frequency processing scheme of HP5065 vapour rubidium standard

[Poul-Henning Kamp]

In message <000001c701a5$5f076420$0202fea9 at athlon>, "Ulrich Bangert" writes:


>But what surprises us completely is the fact that different physics
>packages need DIFFERENT thumbwheel settings to generate the SAME time
>scale as seen with the two devices available.

This is because rubidium vapour standards are not primary standards.

They don't have a "correct" frequency, only a very stable frequency.

The actual resonance frequency of a rubidium standard depends amongst
other things on the partial pressures inside the physics package.

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