December 2, 2013

FCC Technician Exam Question Of The Day (T2B05)

Q) What determines the amount of deviation of an FM signal?

A) The amplitude of the modulating signal

NJ2X Notes:
Modulation is a change or alteration in a signal.  We modulate signals in order to impart information and communicate.  Frequency is modulated in an FM signal.  Deviation of an FM signal is the component of change in carrier frequency that the modulating signal produces.

Edwin Howard Armstrong invented frequency modulation (FM) radio.