- An automatic control circuit which modifies the gain of a receiver at set intervals, so as to maintain the output signal levels within a desired amplitude, in response to varying input signals. To do so, it reduces sensitivity to strong signals, while increasing it for weak ones. Such modifications are usually anticipated, as when a loran receiver adjusts its gain between successive pulses from fixed transmitters. Also called gain-sensitivity control, differential gain control, or sensitivity-time control.
- synonym gain-sensitivity control
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