LESSON 1
FUNDAMENTAL OF RADIO COMMUNICATIONS
TASKS
The soldier will be able to identify the elements of fundamentals of transmission, reception, radio wave
and methods of transmission.
CONDITIONS
Given information and diagrams about the elements of fundamentals of transmission and reception,
radio wave and methods of transmission.
STANDARDS
Demonstrate competency of the objective by responding to 85 percent of the multiple-choice test
covering the elements of fundamentals of transmission, reception, radio wave and methods of
transmission for lesson 1.
REFERENCES
FM 11-65, FM 24-18, and FM 24-21.
Learning Event 1:
ELEMENTS OF TRANSMISSION AND RECEPTION
1.
Radio equipment. A radio set consists essentially of a transmitter that generates radio frequency
(RF) energy; a source of electrical power; a key, microphone, or teletypewriter, that controls these
energy waves; a transmitting antenna that radiates RF waves; a receiving antenna that intercepts some of
the radiated RF waves; a source of electrical power; a receiver that converts intercepted RF waves into
usable energy (usually audio frequency (AF) energy); and a loudspeaker, headphones, or teletypewriter
provided intelligibility. When the frequency coverage of two sets is similar, when they have the same
modulation, and the distance between them does not exceed the range of the equipment, two-way
communications using electromagnetic (radio) waves is possible. Figure 1 is a block diagram of a basic
radio set.
1
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