In _____ transmission, the frequency of the carrier signal is modulated to follow the changing voltage level (amplitude) of the data signal. The peak amplitude and phase of the carrier signal remain constant, but as the amplitude of the data signal changes, the frequency of the carrier changes correspondingly.

In _____ transmission, the frequency of the carrier signal is modulated to follow the changing voltage level (amplitude) of the data signal. The peak amplitude and phase of the carrier signal remain constant, but as the amplitude of the data signal changes, the frequency of the carrier changes correspondingly.

In _____ transmission, the frequency of the carrier signal is modulated to follow the changing voltage level (amplitude) of the data signal. The peak amplitude and phase of the carrier signal remain constant, but as the amplitude of the data signal changes, the frequency of the carrier changes correspondingly.



a. FM
b. QAM
c. AM
d. PM







Answer: A


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