Basic Radio is a free introductory textbook on electronics based on tubes. See the editorial for more information....

Frequency Modulation

Author: J.B. Hoag

First re-read Section 16.2.. The amplitude of the carrier wave remains constant in the frequency-modulation scheme. The frequency is varied from the mean or " carrier " value by an amount called the deviation frequency. If the deviation frequency is directly proportional to the amplitude of the audio signal, the transmitter is operating properly or linearly.

Last Update: 2009-11-01