Performance Characteristics of Portable Atomic Rubidium Clock and Frequency Standard.

The performance characteristics of the portable atomic rubidium clock and frequency standard was evaluated by comparing its output frequency with the output frequency of a cesium beam frequency standard. A description of the portable clock and the instrumentation used for the evaluation are discussed. The drift rate associated with all rubidium frequency standards was, in the case of the portable clock, less than 1 x 10 to the minus 11th powermonth. Author