What type modulation exists when both the width and the period of the pulses vary with the modulating signal?
A) amplitude modulation
B) frequency modulation
C) pulse-position modulation
D) pulse-width modulation

Question

Quizplus · Accepted Answer

Pulse-position modulation (PPM) is a form of signal modulation where both the position (or timing) of the pulses and their width can vary based on the amplitude of the modulating signal. This contrasts with pulse-width modulation (PWM) where only the width of the pulses is varied, and frequency modulation (FM) or amplitude modulation (AM) which do not use pulses in their basic forms.

What Type Modulation Exists When Both the Width and the Period