Which of the following is a characteristic of Phase Modulation (PM)?

A. The phase of the carrier signal is varied based on the input signal
B. The amplitude of the carrier signal is varied
C. The frequency of the carrier signal is varied
D. The signal bandwidth is constant

Explanation:

In Phase Modulation (PM), the phase of the carrier signal is varied according to the input signal, which is a key feature of PM.

Tags: Communications MCQ, Electronics and Communication Engineering