1.

In Amplitude Modulation, the instantaneous values of the carrier amplitude changes in accordance with the amplitude and frequency variations of the modulating signal.(a) True(b) FalseThis question was addressed to me in final exam.Origin of the question is Amplitude Modulation and Modulation Index topic in section Amplitude & Frequency Modulation of Avionics

Answer»

Correct answer is (a) True

To EXPLAIN I would say: In Amplitude MODULATION, the amplitude of the CARRIER sine wave is varied by the value of the information signal. The instantaneous value of the carrier amplitude changes in accordance with the amplitude and FREQUENCY variations of the modulating signal. The carrier frequency remains constant during the modulation PROCESS, But its amplitude varies in accordance with the modulating signal.



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