Critical Task: None
In this lesson you will learn to identify the types of frequency usage employed by a target
TERMINAL LEARNING OBJECTIVE:
Identify the types of frequency usage employed by a link, group or net.
You will use the information provided in this subcourse.
To demonstrate competency of this task, you must achieve a minimum of 70
percent on the subcourse examination.
The material contained in this lesson was derived from the following
NSA Subcourse TA 103 (U)
FM 34-88 (U)
The basic communication structures discussed in lesson 1 may be modified in appearance by
the method of use of operating data. The operating data of a radio net consists of basic
items, such as frequencies, call signs, and schedules. This operating data enables the
network to function in an efficient and orderly manner and eliminates interferon which would
be present if there were none. Of all the operating data, frequency usage is the element which
modifies the net structure to the greatest degree. Call signs and schedules do not modify the
net as much as frequency usage. You should remember that operating data does not change
the basic net structure, it only modifies the net structure to the greatest degree. Call signs
and schedules do not modify the net as much as frequency usage. You should remember that
operating data does not change the basic net structure, it only modified it.
The basis of radio communication is the transmission of radio frequency energy into space
after it has been generated in a transmitter, and the reception of that energy by a receiver at a
distant point. Because radio stations are paired transmitters and receivers, the method of
frequency usage that radio stations use becomes important for reliable and efficient
communication. The manner in which frequencies are used on a net is also of great value in
traffic analysis to gain a complete understanding of the communication system being studied.