April 1970 | Technical Memorandum TM ITS 229
A Peak FM Deviation Calibrator Graph
Cite This Publication
John J. Tary and T. Layne Livingston, “A Peak FM Deviation Calibrator Graph,” Technical Memorandum TM ITS 229, U.S. Department of Commerce, Environmental Science Services Administration, Institute for Telecommunication Sciences and Aeronomy, April 1970.
Abstract:
Use of a decibel plot for the Bessel function makes it a simple task to obtain the single tone peak deviation of FM radio systems. The procedure offers ways to calibrate deviation meters, supplement the carrier disappearance technique, and check the linearity of a generated FM spectrum. These curves are particularly useful in the low deviation range, where the carrier disappearance technique gives unsatisfactory results. The measurement technique described requires only “off the shelf” test equipment.
Keywords: FM radio
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