Date of Award

9-1992

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Electrical and Computer Engineering

First Advisor

Philip J. Joseph, PhD

Abstract

This report shows the relationship between output frequency shifts and the absorption cell magnetic field during microwave power fluctuations on a commercial rubidium frequency clock. Changes in the clock output frequency relative to the 10 MHz reference were monitored as changes in the absorption cell magnetic field (0.01 to 1.0 Gauss) and changes in the cell's interrogation microwave power were varied from the nominal specification (PO) at four discrete values (+1.3. -1.1, -2.2, -4.OdB). The maximum normalized output frequency shift of 1.4x10-10 occurred at--4dB. The maximum normalized frequency change for the +1.3 and -1.1 dB data is about 3 x 10-11, and for the -2.2 dB data is about 6 x 10-11. As a function of the change in microwave power, the maximum frequency change is about 2.6 x 10-11 -per dB of power change. There also existed several magnetic field values which resulted in minimum output frequency change. This occurred at absorption cell magnetic field values of 9 and 27 milli-Gauss, where the nominal setting is 137 milli-Gauss.

AFIT Designator

AFIT-GE-ENG-92S-01

DTIC Accession Number

ADA256466

Comments

The author's Vita page is omitted.

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