TM 11-6625-2950-13
Table 2-1. Operating Controls, Indicators. Connectors, and Test Points
Control, indicator,
Function
connector, or test point
Protects the uhf receiver-transmitter and uhf radio control from a direct
Circuit breaker CB1 DC
current (over 25 amperes) overload.
Protects the fan in the air cooler from an alternating current (over 0.5
Circuit breaker CB2 AC
ampere) overload.
NOTE
The 115-vac, 60-Hz power activates a relay (K1). The relay
prevents the uhf receiver-transmitter from operating until the fan
is operating.
Turns the uhf receiver-transmitter on and off.
RT ON switch S1
Measures the current of the uhf receiver-transmitter and uhf radio
INPUT CURRENT meter M1
control.
Provides ground for the tone keyline to activate the uhf receiver-
TONE ON switch S2
transmitter.
(Three position toggle switch)
Function
Position
Grounds tone keyline.
ON
MOM ON
M o m e n t a r i l y grounds tone keyline (spring-loaded
position).
Opens tone keyline.
OFF
Function
Position
XMT KEY switch S3
Grounds XMT keyline.
ON
(Three position toggle switch)
M o m e n t a r i l y grounds XMT keyline (spring-loaded
M O M ON
position).
Opens XMT keyline.
OFF
Provides ground for the x-mode enable line to activate the uhf receiver-
X-MODE ENABLE switch S4
transmitter to the x-mode condition.
Function
Position
ENABLE Grounds x-mode line.
D I S A B L E Opens x-mode line.
Provides ground for the guard on/off line to activate the guard receiver
GUARD ON switch S5
in the uhf receiver-transmitter.
Provides ground for 100-watt disable line.
100 WATT-30 WATT switch S6
Function
Position
30 WATT Grounds 100-watt disable line and provides approxi-
mately 30-watts of output power.
100 WATT Opens 100-watt disable line and provides approxi-
mately 30-watts of output power.
Provides a ground for the preset frequency read line..
PRESET FREQ switch S7
(Two position pushbutton switch)
Function
Position
Pressed
Grounds the preset frequency read line and activates
the uhf radio control and indicator to read the
frequency that is programed on the selected preset
channel (spring loaded position).
Released
Opens the preset frequency read line.