PM Basics

Phase modulation equation, modulation index.

Darshan N
Updated: 19 March 2026
4 min read

PM Basics Quiz

Test your understanding of phase modulation equations and modulation index behavior.

Question 1 of 3

Q1.A PM signal is expressed as s(t) = Ac*cos(2*pi*fc*t + kp*m(t)). For m(t) = Am*cos(2*pi*fm*t), the modulation index for PM is defined as: