The typical squelch circuit cuts off __________(a) An audio amplifier when the carrier is absent(b) RF interference when the signal is weak(c) An IF amplifier when Automatic Gain Control is maximum(d) An IF amplifier when Automatic Gain Control is minimumThe question was posed to me in an international level competition.I need to ask this question from Noise for SSB-SC in portion Noise of Analog Communications

The typical squelch circuit cuts off __________(a) An audio amplifier

1.	The typical squelch circuit cuts off __________(a) An audio amplifier when the carrier is absent(b) RF interference when the signal is weak(c) An IF amplifier when Automatic Gain Control is maximum(d) An IF amplifier when Automatic Gain Control is minimumThe question was posed to me in an international level competition.I need to ask this question from Noise for SSB-SC in portion Noise of Analog Communications
Answer» Right option is (a) An audio amplifier when the CARRIER is absent The explanation: The use of SQUELCH circuit is to suppress the audio or video output of a receiver in the absence of a sufficiently STRONG desired input SIGNAL.

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