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Which effect is characteristic of FM reception in a noisy environment?

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Which effect is characteristic of FM reception in a noisy environment?

(a) threshold effect

(b) capture effect

(c) bessel effect

(d) carson’s effect

The question was asked in a national level competition.

The question is from Non Linear Device topic in chapter Side Band Techniques of Analog Communications

1 Answer

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Right option is (a) threshold effect

Explanation: Signal to Noise ratio is the measure of signal present with respect to the surrounding noise. Threshold effect has low output signal to noise ratio. It contains large noise as compared to input signal in envelope detector. In threshold effect, detection of message signal is difficult.

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