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Communication Systems - Engineering

Q1:

On modulating a carrier of frequency fc by an audio signal fs, the following components has resulted:
fc, fc + fs and fc - fs
What is this type of modulation likely to be?

A Amplitude modulation (DSB)

B Single sideband modulation

C Frequency modulation only

D Amplitude modulation or frequency modulation

ANS:A - Amplitude modulation (DSB)

No answer description is available.