An FM signal has a center frequency of 154.5 MHz, but is swinging between 154.45 MHz and 154.55 MHz at a rate of 500 times per second. Its input intelligence frequency is:
A) 100 kHz
B) 500 Hz.
C) 154.5 MHz
D) 50 kHz.

Question

Quizplus · Accepted Answer

The input intelligence frequency is the rate at which the carrier frequency is modulated, which in this case is 500 times per second, or 500 Hz.

An FM Signal Has a Center Frequency of 154