PERFORMANCE CHARACTERISTICS OF TWO-HEWLETT-PACKARD ATOMIC CS BEAM FREQUENCY STANDARDS.
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
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Two commercial Hewlett-Packard Company all solid-state, atomic cesium beam frequency standards, Model 5060A, Serial Nos. 103 and 109, adjusted to the UT-2 1965 time scale 150 x 10 to the minus 10th power, have been under evaluation since 9 November 1965. This report describes the Hewlett-Packard atomic frequency standard and includes information on its performance capabilities. Stability measurements were performed by comparing the output frequency of the No. 103 and No. 109 against each other and against other atomic frequency standards. In March 1966 both standards were modified to the UT-2 1966 time scale 300 x 10-10. Stability with respect to the environments of 0C to 50C temperature and 5-33 cps, 0.01 in. D. A. vibration was better than 5.0 x 10 to the minus 12th power and 1.0 x 10 to the minus 11th power respectively. Stability at room temperature was consistently better than 0.05, however, there were four beam tube failures in a four-month period. The beam tube manufacturer, Bomac Company - a subsidiary of Varian Associates - claims that they have isolated the difficulty and subsequent beam tubes would be reliable. Author
- Test Facilities, Equipment and Methods