Types of Operation - TM-11-5820-518-200018

TM 11-5820-518-20

receiver on, guard receiver off); transmission

and reception (main and guard receivers on);

and transmission, reception, and adf operation

(guard receiver off ). When the radio set con-

trol function select switch is set to T/R, it en-

ables selection of transmit-receive operation

(main receiver on). When the function select

switch is set to T/R+G, transmit-receive plus

guard receiver (normally fixed tuned on 243

mc) operation is possible. When the function

select switch is set to ADF, it permits trans-

mit-receive operation (guard receiver off), plus

direction finder operation when adf equipment

is used with the radio set.

2-3. Preliminary Operating Procedures

Figure 2-1. Radio Set Control C-4677/ARC-51X,

f r o n t panel contro1s.

Caution: D O not attempt operation of the

equipment unless the radio set is connected to

2-2. Types of Operation

a suitable uhf antenna or dummy load.

(figs. 2-1 and 2-2)

a. Turn on the aircraft communication

power controls.

Three types of operation are available to the

b. Set the function select switch (figs. 2-1

operator; transmission and reception (main

Figure 2-2. Radio Set Control C-6287/ARC-51BX, front panel controls.

2-2