mechanical modulator

mechanical modulator

[mi′kan·ə·kəl ′mäj·ə‚lād·ər]
(electricity)
A device that varies a carrier wave by moving some part of a circuit element.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The FLC device replaces a large, noisy mechanical modulator, or chopper.