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In AM receiver, the oscillator frequency is always ________(a) lower than signal frequency(b) higher than signal frequency(c) equal to signal frequency(d) equal to 1KHzI have been asked this question at a job interview.I'd like to ask this question from Noise in Phase Modulation in division Noise of Analog Communications

Answer»

The correct CHOICE is (B) higher than signal frequency

To EXPLAIN: The frequency of an OSCILLATOR in AMPLITUDE modulated system is always higher than the frequency of signal.



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