Section II. INSTALLATION INSTRUCTIONS - TM-11-5895-1141-340042

TM 11-5895-1141-34

Section II. INSTALLATION INSTRUCTIONS

SECTION CONTENTS

Page

Special Tools and Test Equipment..........................................................................................

Installation ...............................................................................................................................

Equipment Interconnections ....................................................................................................

Test and Adjustment of Equipment .........................................................................................

Circuit Alignment .....................................................................................................................

3-3. SPECIAL TOOLS AND EQUIPMENT

There are no special tools or test equipment required for installation of the radio channel control.

3-4. INSTALLATION

The radio channel control is equipped with a headset/microphone jack panel assembly located below the audio and

selector units. The audio unit assembly is located on the left side of the console front panel opening. The selector unit

assembly fills the right side of the opening. The units are supported by angle brackets, slotted screws are supplied to be

used for securing the units to the console. Place the screws through the corner mounting holes in each unit, the insert

them into the console chassis captive nuts and tighten.

3-5. EQUIPMENT INTERCONNECTIONS

Installation consists of making connections between the equipment and the outside lines to the radio transmitters and

receivers and then connecting the equipment to the +24 volt dc power supply source. See figure 3-1. If a recorder is to be

used, it is connected to J104; the connections will be found in figure FO-6. There are two options for connecting the

transmitter/receiver lines to the equipment; one requiring four wires per channel, the other six wires. In the four wire mode,

jumpers are connected from terminals E15 to E16, E50 to E49, and E51 to E48 on selector unit assembly circuit board,

figure FO-12. In this mode, the transmitter audio wire pair is operated in a phantom mode, the center tap of the output

transformer T2 being grounded by keying relay K1 to the transmitter. The equipment is shipped, wired in the four wire

mode. In the six wire mode, a separate pair of wires is used for keying the transmitter. The transmitter/receiver wires are

connected to connectors P201 and P202 which mates the connectors J201 and J202 on the rear of the selector unit

assembly. Up to eight channels may be accommodated and the channels to be used are connected in accordance with

table 3-1. A radio channel selector module SA-2328/FRC is inserted in the selector unit assembly for each channel, any

unused positions being covered with a blank panel. External power supply connections are made to connector J105 on

the back of the audio unit assembly. Mating plugs P103, P104, P105 are furnished

3-2