Table 3-1. AN/GRC-171 Controls and Indicators (Sheet 4 of 4)

TO 31R2-2GRC171-2

TM 11-5820-815-14

NAVELEX 0967-LP-544-5010

CONTROL OR

REFERENCE

INDEX

INDICATOR

DESIGNATION

FUNCTION

RADIO RECEIVER-TRANSMITTER RT-980/GRC-171 (Figure 3-2) (Cont)

PWR ON/OFF

Toggle switch. Enables receiver-transmitter dc-to-dc

switch

converter.

NOTE

PWR ON/OFF switch S1 is operative only when RT-980/GRC-171

POWER ON/OFF switch SI is in the ON position.

READY

DS1

Indicator lamp. When lit, indicates receiver-transmitter tuning

complete.

NOTE

READY lamp DS1 is operative only when REMOTE/LOCAL switch

S3 on RT-980/GRC-171 is in the REMOTE position.

VOL

Potentiometer. Controls receiver-transmitter audio out-

put level at remote speaker or headset location.

SQLCH ON/OFF

Toggle switch. Selects squelch operation.

switch

NOTE

SQLCH ON/OFF switch S2 is operative only when

REMOTE/LOCAL switch S3 on RT-980/GRC-171 is in the

REMOTE position.

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