SIGNAL SUBCOURSE 323, FM RADIO TRANSMITTERS
INTRODUCTION
In a field army, a sufficient number of radio sets are available to provide
radio communications for all commanders.
Most of these radio sets use a type of
modulation that is called frequency modulation (FM). These FM radio sets are used
to pass various types of communication traffic and also appear in various sizes and
shapes. For example: these sets vary from the relatively simple squad type to the
highly sophisticated type used in satellite communication terminals.
Even though
these sets transmit FM signals, there are different methods used to develop these
modulated signals.
This subcourse is written to make you aware of different frequency-modulating
techniques and to acquaint you with various types of circuits used in FM
transmitters.
This subcourse consists of four lessons
as follows:
Lesson 1.
Principles of FM
Lesson 2.
Methods of Producing FM
Lesson 3.
FM Transmitter Circuits
Lesson 4.
Credit Hours: 10
You are urged to finish this subcourse without delay; however, there is no
specific limitation on the time you may spend on any lesson or on the examination.
Texts and materials furnished:
Subcourse Booklet
TM 11-668, F-M Transmitters and Receivers, September 1952
REVIEWED AND REPRINTED WITH MINOR REVISIONS AUGUST 1976
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