LESSON 3
SYSTEM ALIGNMENT
TASK
The soldier will define the principles of system alignment, noise, interference and fading.
CONDITIONS
Given information and diagrams about the principles of system alignment, noise, interference and
fading.
STANDARDS
Demonstrate competency of the objective by responding to 85 percent of the multiple-choice test
covering the principles of system alignment, noise, interference and fading in lesson 3.
REFERENCE
FM 24-21
Learning Event 1:
CONTROL OF ALIGNMENT
1.
General.
The overall microwave multichannel system must be aligned in accordance with instructions
contained in the appropriate equipment technical manuals (TM). Both the radio system and the
multiplexer system are included in the overall system alignment.
2.
Control of alignment.
a. All alignments are supervised by the controlling terminal, designated terminal A. The
remaining terminal in the system is designated terminal B. The multichannel equipment operators at
terminal A will supervise the overall system alignment.
b. During system alignment, intermediate or repeater stations report all readings to the
controlling terminals.
c. Permission to make alignment adjustments must be obtained from the control terminal. If
equipment is being used that requires critical signal levels to be transmitted over the system, the control
terminal must ensure that no more than a 2 dB change will result in the system as a result of any one
alignment.
38
Previous Page
