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Figure 5-1. Radio Receiver-Transmitter RT-980/GRC-171, Test Point Location
Up
TM-11-5820-815-14 Service and Circuit Diagrams RADIO SET AN/GRC-171 Manual
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Table 5-3. Radio Receiver-Transmitter RT-980/'GRC-171 Performance Tests (Sheet 2 of 17)


TO 31R2-2GRC171-2
TM 11-5820-815-14
NAVELEX 0967-LP-544-5010
Radio Receiver-Transmitter RT-980.GRC-171 and Radio
5-7. PERFORMANCE TESTS.
Set Control C-7999/GRC-171 respectively. If any step
results in an incorrect response, trouble-
shoot the radio set using Radio Set AN/GRC-171
5-8. PERFORMANCE STANDARDS. Tables 5-3 and
troubleshooting procedures, figure 5-9, and block
Radio Receiver-Transmitter RT-980/GRC-171 and 5-4
diagrams and schematic diagrams in chapters 4 and 6.
list the step-by-step procedures to be followed Radio Set
Control C-7999/GRC-171 respectively, when performing
performance standards tests on
Table 5-3. Radio Receiver-Transmitter RT-980/GRC-171 Performance Tests (Sheet 1 of 17)
CONTROL SETTINGS
OPERATION OF TEST
AND OPERATION
PERFORMANCE
STEP
EQUIPMENT
POINT OF TEST
OF EQIPMENT
STANDARD
POWER SUPPLY
1
Connect rf load to RT-980/
GRC-171 antenna connec-
tor (J9 rear panel).
2
POWER lamp
Set RT-980/GRC-171
POWER lamp and
(A10A1DS1)
switches as follows:
READY lamp are
and READY
lit.
lamp
REMOTE/LOCAL to
(A10A1DS2)
LOCAL, PTT/
CARRIER TEST to
PTT, SQUELCH to
OFF, TEST meter
selector to OFF,
POWER to ON.
3
TEST
Rotate TEST meter
meter
selector through
(A10A1M1)
the following settings-
and verify the readings:
+26V
26 1.5 V dc.
+22V
22 1.5 V dc.
+12V
12 + 1.0 V dc.
+5V
5.1 0.5 V dc.
-12V
12 1.0 V dc.
TEMP
Meter does not read in
OVER TEMP range.
4
Connect dvm to RT-980/
RECT DC
21 to 60 V dc.
GRC-171 RECT DC test
(A10A1TP13)
point.
RECEIVER MAIN AUDIO (NARROW BAND) OUTPUT
5
Connect equipment as
shown in figure 5-2.
5-7


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