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 ?
It is equipped with a digital control panel (DCP) and special features include a gain control, internal/external automatic level control (ALC) with front panel control of the ALC threshold, pulse input capability and RF output level protection.
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.
Both PAs integrate a power detector (not available in GaAs HBT designs) that provides over 15dB dynamic range with [+ or -]1 dB accuracy, al lowing an accurate automatic level control (ALC) function to be implemented without additional components.
In addition, the limiting function can eliminate the need for automatic level control. The differential pair configuration can be realized at very high frequencies.
It has two analog-to-digital converters, each with its own two input selector, programmable gain amplifier (PGA) and automatic level control (ALC) circuit.

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