Us Army Electronics Course - High Frequency Fixed Station Radio Systems Mm0750.pdf

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SUBCOURSE
MM0750
EDITION
0
HIGH-FREQUENCY FIXED-STATION
RADIO SYSTEMS
VALIDATION INFORMATION
This subcourse has been validated in the field by continuous use for over 3 years.
i
SUBCOURSE 750
Contents
Introduction
Lesson 1 - Introduction to High-Frequency
Communications Systems
Lesson 2 - Communication Circuit Quality
Lesson 3 - Transmitting Equipment
Lesson 4 - Receiving Equipment
Lesson 5 - Antenna Systems
Lesson 6 - Mobile Radio Stations
Lesson 7 - Frequency Planning
Lesson
Lesson
Lesson
Lesson
Lesson
Lesson
Lesson
Lesson
Solutions
1
2
3
4
5
6
7
Page
1
3
29
57
90
111
148
169
192
194
195
196
197
199
200
202
Total Credits
2
16
2
2
2
2
2
2
2
Credit Hours
Examination
* * * IMPORTANT NOTICE * * *
THE PASSING SCORE FOR ALL ACCP MATERIAL IS NOW 70%.
PLEASE DISREGARD ALL REFERENCES TO THE 75% REQUIREMENT.
ii
SUBCOURSE 750
HIGH-FREQUENCY FIXED-STATION RADIO SYSTEMS
INTRODUCTION
To maintain efficient and effective fighting forces, a large volume of logistical and administrative
data must be exchanged among the various command headquarters throughout the world.
The Defense Communications System is a worldwide point-to-point communications network
designed for operations on a global scale. It provides data, teletypewriter, voice, and facsimile facilities.
It is a system of interconnected fixed radio stations and leased or allocated long-distance wire channels.
The system does not include local tactical and special-purpose communications circuits, but its facilities
are available for use by all echelons of the Army, and long-distance circuits may be permanently or
temporarily allocated to any approved user.
Although the Defense Communications System is controlled by the Department of Defense,
portions of the system are operated by the three military departments. The Army portion is operated by
the US Army Communications Command, one of the major commands of the US Army.
The purpose of this subcourse is to familiarize you with the principles involved in long-distance
radio systems, the problems associated with establishing and maintaining these systems, the operational
equipment used, and the duties of those individuals responsible for them.
This subcourse consists of seven lessons and an examination, as follows:
Lesson 1.
Lesson 2.
Introduction to High-Frequency Radio Communications Systems
Communications Circuit Quality
1

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