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 TM
11-6625-564-45
4-6. Radio Set Simulator Test
a. Test Equipment and Materials.
(1) Voltmeter, Meter ME-30(*)/U.
(2) Multimeter ME-26B/U.
(3) Audio Oscillator TS-421/U.
(4) Charger, Battery PP-1451/U.
(5) Matching pad, 600-ohm/5-ohm (C, fig. 4-1).
(6) Matching pad, 600-ohm/150-ohm (D, fig. 4-1).
(7) Resistor, 150-ohm, 1/2-watt.
(8) Resistor, 9.5-ohm, 1/2-watt.
(9) Test unit (part of maintenance kit).
( 10) Dummy load (part of maintenance kit).
(11) Cables W1, W2, W5 (part of maintenance kit).
b. Test Connections and Conditions.
(1) Remove the dust cover from the radio set simulator.
(2) Connect the test setup shown in figure 4-3.
(3) Set the switches and controls on the front panels of the radio set simulator and the test
unit as indicated in the chart below.
Item
Position
Switch or control
Test unit
POWER switch
OFF
Test unit
PTT switch
OFF
Test unit
RF DET switch
OFF
Test unit
HDSET
MIC SELECT switch
Test unit
FUNCTION SELECT switch
OFF
Test unit
AUDIO GAIN control
Fully clockwise
Radio set
simulator
POWER switch
OFF
Radio set
simulator
XMIT LOAD switch
OFF
TEST SELECT switch
Radio set
simulator
OFF
Radio set
simulator
Fully clockwise
AUDIO GAIN control
c. Procedure.
Step
No.
Test Equipment
Test procedure
a. POWER: RE-
1
a. None.
a. Turn on battery charger,
a. POWER: RESET ON.
SET ON.
and adjust output for
+27.5 vdc.
b. Meter must read in green
b. Observe meter on radio
b. FUNCTION
b. TEST SELECT: ADF.
set simulator.
SELECT :
band of scale A.
T.R.
c. Observe T/R indicator
c. T/R indicator and
and + 27.5V indicator
+27.5V indicator will
on radio set simulator.
light.
2
Test unit
Controls remain as at end
a. Turn test unit FREQ
a. Two far left numbers of
Three FREQ SE-
of step 1.
SELECT 10-megacy-
readout mechanism
LECT switches
cle switch to all of its
will read same as set-
to any position.
positions, and observe
ting of switch.
readout mechanism of
radio set simulator.
77
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