Figure 2-4. Test cable receptacle shelf, when removed, top view.

TM 11-6625-409-12

2-5.

Radio Set Control 614U-6, Controls and

Indicators

Control or indicator

Function

Control, or indicator

Function

FREQ MC indicator

Indicates transmitter or receiver

POWER switch

Turns primary power to remote

window.

Frequency selected.

control unit on or off.

SCS-DCS/DCD switch a

Selects single channel simplex

VOL control knob

Controls Receiver 51X-2B

or double channel

(under test) radio volume

simplex/double

level to headset.

channel duplex type of

SQ control knob

Adjusts squelch threshold level

operation for AN/ARC-73

on Receiver 51X-2B output.

under test.

Megacycle dial control

Selects transmitter or receiver

Panel lamps

Illuminate translucent panel

knob.

Frequency in 1-megacycle

markings.

increments.

Kilocycle dial control

Selects transmitter or receiver

knob.

Frequency in 50-kilocycle in-

crements.

Figure 2-5. Radio Set Control 614U-6, front panel.

2-8