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TM 11-6625-564-12
Control or indicator
Function
RF DET switch (two-position)
Connects either main audio or detected signal from re-
ceiver-transmitter to HDSET H101A/U and MAIN
AUDIO jacks.
OFF
Connects main audio signal to HD SET
H-101A/U jack, though audio gain
control.
ON
Disconnects main audio signal from head-
set, Applies detected rf signal from
receiver-transmitter to HDSET
H-101A/U through AUDIO GAIN
control.
POWER switch set to RESET ON:
Lights when FUNCTION SELECT switch is
T/R lamp
turned to T/R.
Lights when FUNCTION SELECT switch is
T/R+G lamp
turned to T/R+G.
Lights when FUNCTION SELECT switch is
ADF lamp
turned to ADF.
Lights when PTT switch is set to ON or MOM ON.
XMIT lamp
Provides a connection between test unit and radio set
J6 connector
(not shown; located on test unit
control during testing procedures.
at rear of
radio set control simulator. Radio
set control
simulator must be removed to
reach this
connector.
b. Test Unit Connectors. (fig. 2-2).
Function
Connector
Provides electrical connections to test unit from receiver-transmitter
J1
under test.
Provides electrical connections to test unit from receiver-transmitter
J2
under test.
Provides electrical connections to test unit from +27.5-volt dc power
J5
source.
Provides facilities for rf interconnection to receiver-transmitter.
J3
Provides a connection from test unit to either an antenna or dummy
J4
load.
Provides points for testing main audio signal. Lower jack is ground.
MAIN AUDIO
(two jacks)
Provides points for testing auxiliary audio signal. Lower jack is ground.
AUX AUDIO
(two jacks)
Provides points at which an audio oscillator signal can be applied
DUM MIC
through the test unit to receiver-transmitter. Lower jack is ground.
(two jacks)
Provides test point to check radio set ave.
AVC jack
Provides a test point to check if squelch relay K1 is energized or not.
CAR RELAY JACK
Provides a test point to check for ADF plate voltage and whether adf
+225V jack
relay K8 is energized or not.
Provides test point to check input voltage to test unit.
+27.5V jack
Provides jack to connect headset to test unit.
HDSET H-101A/U jack
20

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