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Table 5-3. Radio Receiver-Transmitter RT-980/GRC-171 Performance Tests (Sheet 15 of 17)
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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 17 of 17)


TO 31R2-2GRC171-2
TM 11-5820-815-14
NAVELEX 0967-LP-544-5010
Table 5-3. Radio Receiver-Transmitter RT-980/GRC-171 Performance Tests (Sheet 16 of 17)
CONTROL SETTINGS
OPERATION OF TEST
AND OPERATION
PERFORMANCE
STEP
EQUIPMENT
POINT OF TEST
OF EQUIPMENT
STANDARD
TRANSMITTER KEYING (Cont)
70
Disconnect audio
RT-980/GRC-171.
RADIO RECEIVER-TRANSMITTER OPERATIONAL PERFORMANCE
71
Connect RT-980/GRC-
Set RT-980/GRC-171
171, C-7999/GRC-171,
switches as follows:
and antenna as for nor-
REMOTE/LOCAL
mal operation. Connect
to LOCAL,
Handset H-169U to
SQUELCH to ON,
RT-980/GRC-171
PTT/CARRIER TEST
DYNAMIC MIC jack.
to PTT, TEST
meter selector to
OFF, POWER to ON,
and frequency selec-
tor to an authorized
assigned frequency.
72
TEST meter
Key transmitter and
(A10A1M1)
rotate the TEST
meter selector
through the follow-
ing settings and
verify readings:
FWD PWR
16 to 24 watts.
RFLD PWR
Not more than 25%, of
forward power.
% MOD (talk into
Observe needle
handset micro-
movement.
phone on this
setting)
TEMP
Meter does not read
in OVER TEMP range.
+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.
73
Connect digital multi-
Key transmitter.
meter to the following
RT-980/GRC-171 front
panel test points and
verify readings:
TUNE VOLT
TUNE VOLT
-0.54 to -0.60 V dc
(Cont)
(A10A1TP3)
(300.000 MHz).
5-22


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