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Page Title:
Table 3-1. AN/GRC-171 Controls and Indicators (Sheet 3 of 4) |
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|  TO 31R2-2GRC171-2
TM 11-5820-815-14
NAVELEX 0967-LP-544-5010
Table 3-1. AN/GRC-171 Controls and Indicators (Sheet 3 of 4)
CONTROL OR
REFERENCE
INDEX
INDICATOR
DESIGNATION
FUNCTION
RADIO RECEIVER-TRANSMITTER RT-980/GRC-171 (Figure 3-1) (Cont)
11
SQUELCH ON/
A10A1S5
Toggle switch. Selects squelch operation.
OFF switch
NOTE
SQUELCH ON/OFF switch S5 is operative only when
REMOTE/LOCAL switch S3 is in LOCAL position.
12
VOL
A10A1R1
Potentiometer. Controls audio output level to HEADSET
jack J3 and DYNAMIC jack J4.
13, 14
POWER AC
A10A1F2,
Indicator fuseholders. When lit, indicates ac power fuse
A10A1F3
is blown.
15
POWER DC
A10A1F1
Indicator fuseholder. When lit, indicates dc power fuse
is blown.
16
POWER
A10A1DS1
Indicator lamp. When lit, indicates dc-to-dc converter
is operating.
17
POWER ON/OFF
A10A1S1
Toggle switch. Applied ac or dc primary power to the
switch
receiver-transmitter power supply.
RADIO SET CONTROL C-7999/GRC-171 (Figure 3-2)
1
FREQUENCY
S7
8-position thumb-wheel switch. Selects tuned frequency
switch
in 100-MHz steps.
2
FREQUENCY
S6
10-position thumb-wheel switch. Selects tuned frequency
switch
in 10-MHz steps.
3
FREQUENCY
S5
10-position thumb-wheel switch. Selects tuned frequency
switch
in 1-MHz steps.
4
FREQUENCY
S4
10-position thumb-wheel switch. Selects tuned frequency
switch
in 0.1-MHz steps.
5
FREQUENCY
S3
8-position thumb-wheel switch. Selects tuned frequency
switch
in 25-kHz steps.
NOTE
FREQUENCY switches S3 through S7 are operative only when
REMOTE/LOCAL switch S3 on RT-980/GRC-171 is in the
REMOTE position.
3-4
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