Section II. OPERATION UNDER USUAL CONDITIONS

TM 11-5820-509-12

Control. indicator,

Sw pos

Function

Control, indicator

Function

or receptacle

TUNE

During radio set tuning, the

or receptacle

high voltage supply is

Indicators (4)................................. Two

lamps

illuminate

the

directly enabled by this

KILOCYCLES

indicator,

one

switch.

additional lamp illuminates POWER

AMPLIFIER LOAD and POWER

AMPLIFIER TUNE controls, and

another lamp illuminates the XMTR

OUTPUT meter.

Section II. OPERATION UNDER USUAL CONDITIONS

lamps only when necessary.

3-3. General

a. Set POWER/LIGHTS switch (fig. 3-1) to ON/LO

NOTE

and allow a minimum of 5 minutes for stabilization.

Condensed operating procedures are

b. Press BATTERY TEST pushbutton, and observe

provided on the back of the panel cover

that XMTR OUTPUT meter indicates in white area of the

and may be used during emergencies.

scale.

Radio Set AN/PRC-47 provides voice (usb), telegraph

c. Adjust three frequency control knobs on receiver

(cw), or teletypewriter (fsk) communications. To operate

transmitter front panel for desired operating frequency

the receiver-transmitter properly, perform the following

indication in KILOCYCLES window.

procedures:

d. Adjust VOLUME control to provide comfortable

a. Preliminary starting procedures (para 3-4).

listening level.

b. Receive operation (para 3-5).

NOTE

c. Transmit operation (para 3-6).

Clear

reception

occasionally

d. Voice (usb) operation (para 3-7).

hampered by spurious noises (birdies)

e. Telegraph (cw) operation (para 3-8).

occurring at the top three channels of

f. Teletypewriter (fsk) operation (para 3-9).

each MHz band (2.997 MHz, 2.998

g. Remote control operation (para 3-10).

MHz, and 2.999 MHz for example).

h. Tuning the power amplifier (para 3-11).

This condition is normal for the radio

i. Tuning with 50-ohm load (para 3-12).

set.

j. Stopping procedures (para 3-13).

3-6. Transmit Operation

3-4. Preliminary Starting Procedures

Receiver Transmitter, Radio RT-67 1 /PRC-47 is operated

The following initial adjustments and control settings are

as a transmitter by performing the following procedures.

made before connecting power to the receiver-transmitter.

WARNING

a. Set POWER/LIGHTS switch (fig. 3-1) to OFF /OFF.

b. Set XMTR PWR switch to OFF.

Do not touch the antenna above the

c. Set OPR-TUNE switch to OPR.

threaded stud while transmitting.

d. Rotate M ADJ control fully cw and then turn it back

Serious injury or DEATH can result.

about a quarter turn from its stop.

a. Set POWER/LIGHTS switch (fig. 3-1) to ON /LO

e. Rotate VOLUME control about halfway clockwise.

and allow a minimum of 5 minutes of stabilization.

f. Set CW-FSK/VOICE switch to VOICE.

b. Press BATTERY TEST pushbutton and observe that

g. Connect the antenna system to the receiver- in

XMTR OUTPUT meter indicated in white area of the

accordance with paragraph 2-7b.

scale.

h. Connect Handset H-33G/PT (or any other audio

NOTE

input/output device) to the AUDIO connector on the

If the operating frequency must be

receiver-transmitter front panel.

changed, perform c below.

i. Depending on the mode of operation, connect the

c. Adjust three frequency control knobs on receiver-

appropriate power cable to the primary power source

transmitter front panel for desired operating frequency

(para 2-7 c) and then attach the other end of the cable to

indication in KILOCYCLES window.

POWER connector on the receiver- front panel.

d. Perform the procedures of paragraph 3-7 if voice

3-5. Receive Operation

(usb) operation is desired; paragraph 3-8 below if

telegraph (cw) operation is desired; paragraph 3-9 below

CAUTION

if teletypewriter (fsk)

To conserve battery power, use panel

3-3