Discussion :: Communication Systems
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The typical squelch circuit
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A.
cuts off IF amplifier when AGC is minimum
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B.
cuts off IF amplifier when AGC is maximum
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C.
cuts off audio amplifier when carrier is absent
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D.
eliminates RF interference when signal is weak
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Answer : Option C
Explanation :
To suppress noise when carrier is absent, squelch circuit cuts off audio amplifier.
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