automatic level control
Also found in: Acronyms.
automatic level control
[¦ȯd·ə¦mad·ik ′lev·əl kən‚trōl] (electronics)
A circuit that keeps the output of a radio transmitter, tape recorder, or other device essentially constant, even in the presence of large changes in the input amplitude. Abbreviated ALC.
(mechanical engineering)
In an automotive vehicle, a system in which two air-chamber shock absorbers in the rear are fed compressed air by an electric compressor; pressure in the air chambers is determined automatically by sensors to maintain the vehicle at a predetermined height regardless of load.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
Special features include gain control, internal/external
automatic level control (ALC) with front-panel or remote control of the ALC threshold, pulse input capability and RF output level protection.
In addition, the limiting function can eliminate the need for
automatic level control. The differential pair configuration can be realized at very high frequencies.
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