From International Dictionary of Marine Aids to Navigation
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Alternative term: Squelch (U.S.A.)

1. The process of inhibiting, by an automatic device incorporated in a receiver, any response (usually acoustic) to an excitation of less than some predetermined magnitude or any response with a signal-to-noise ratio below some predetermined value.

Note: The term Noise suppression for this process is deprecated.

2. Automatically making a receiver insensitive when a neighbouring transmitter is working.

Note: This process is often termed Desensitising.

Reference: B.S.

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)



Centre of buoyancy

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM