TECHNIQUE FOR MEASURING THE ACCELERATION SENSITIVITY OF QUARTZ RESONATORS

Milton H. Watts, Errol P. Bernisse, Roger W. Ward, Robert B. Wiggins

Abstract:	We present a simple method for measuring the acceleration sensitivity of quartz resonators. This method utilizes readily available electronic components and the voltage-frequency effect in doubly-rotated cuts, or a simple vo for singly-rotated cuts, to determine both phase and magnitude information. The method is based on monitoring vibration-induced FM sidebands of an oscillator with a spectrum analyzer while applying acceleration compensation. An op amp circuit with reversible polarity is used to supply a compensation signal which is proportional to an accelerometer output. Since the goal is to observe a reduction or increase in FM sideband magnitude, the phase and magnitude requirements of the compensation circuit are less than that required for high level compensation. Examples will be given of the method. Typical reductions or enhancements of 6 to 20db can be seen easily and are sufficient to establish the absolute phase (sign) of each gamma vector component. Data is presented to show that acceleration sensitivities of 1E-10/g can be measured with confidence.
Published in:	Proceedings of the 20th Annual Precise Time and Time Interval Systems and Applications Meeting November 29 - 1, 1988 Sheraton Premiere Hotel Vienna, Virginia
Pages:	295 - 304
Cite this article:	Watts, Milton H., Bernisse, Errol P., Ward, Roger W., Wiggins, Robert B., "TECHNIQUE FOR MEASURING THE ACCELERATION SENSITIVITY OF QUARTZ RESONATORS," Proceedings of the 20th Annual Precise Time and Time Interval Systems and Applications Meeting, Vienna, Virginia, November 1988, pp. 295-304.
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