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Hp 5065A rubidium vapor frequency standard, opt 002


The HP 5065A, like many atomic frequency standards, can be fine-tuned in frequency with the so-called C-field adjustment. The hyperfine transition used in the clock is slightly influenced by magnetic field so this phenomenon can be, and is, used as a fine frequency adjustment. The name is historical: the earliest atomic beam standards used magnets labeled "A" and "B" to state select atoms on either end of the microwave cavity and third magnet labeled "C" to maintain the magnetic field within the cavity. Hence C-field.
This results in a long term stability exceeding typical quartz oscillator frequency standards by 10 to 100 times! It has excellent short term stability as well.
The Agilent HP 5065A is suitable for many applications such as precise frequency source for systems operating in the radio spectrum, coherent signal source of all types of equipment, precision timekeeping, and for house standards/calibration laboratories.
- Long Term Drift Rate: <2 x 10-11/mo.
- Short Term Stability: <7 x 10-12 for 100 S average
- Frequency Synthesizer Time Scale Changer
- Calibrated Dial, Fine Frequency Adjustment



Hp 5065A rubidium vapor frequency standard, opt 002