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Chapter 1. INTRODUCTION - TM-11-5895-1141-340007
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TM-11-5895-1141-34 Control Radio Channel C-1 0931 (P)/FRC (NSN
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Figure 1-1. Control, Radio Channel Console, Front View


TM 11-5895-1141-34
Section II. EQUIPMENT DESCRIPTION AND DATA
SECTION CONTENTS
PAGE
Purpose and Use
Physical Description and Module Location
Description of Major Components
Electrical and Signal Characteristics
Operation
Difference Between Modules
1-4. PURPOSE AND USE
The purpose of the C-10931(P)/FRC equipment is to provide a capability of controlling 1 to 8 radio channels used in air
traffic control by means of a complete radio control operator's position. Each radio channel contains a transmitter and
receiver remotely operated through the Radio Channel Control System.
1-5. PHYSICAL DESCRIPTION AND MODULE LOCATION
The C-10931(P)/FRC equipment is a self-contained unit designed to be mounted on a flat, horizontal surface wherever
operation is convenient and necessary wiring is accessible. The console is 16-1/4 wide by 14-1/2 deep by 7-1/2 inches
high at the front, and 5 inches high at the rear. Four rubber feet, 5/8 inches high are attached to the bottom of the console
and a microphone hanger bracket is attached on the right side. All necessary wiring passes through a cutout in the rear of
the chassis. A front view of the console is shown in figure 1-1. The numbered callouts locate the various modules
mounted on the front panel. The list below identifies the modules numbered in figure 1-1.
a.
Microphone amplifier/lamp brightener module assembly
b.
Recorder-monitor module PL-1455/FRC
c.
Volume control module assembly
d.
Audio unit assembly
e.
Selector Module, Radio Channel SA-2328/FRC
f.
Blank panel assembly
g.
Selector unit assembly
h.
Headset/microphone jack panel assembly
I.
Table top console assembly
1-6. DESCRIPTION OF MAJOR COMPONENTS
What follows is a brief functional description of the major assemblies within the system.
a.  Microphone Amplifier/Lamp Brightness Assembly. This assembly is mounted on the audio unit assembly. The
audio signal inputs from the
1-2
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