automatic threshold variation
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automatic threshold variation[¦ȯd·ə¦mad·ik ′thresh‚hōld ‚ver·ē′ā·shən]
Constant false-alarm rate scheme that is an open-loop of automatic gain control in which the decision threshold is varied continuously in proportion to the incoming intermediate frequency and video noise level.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.