CONTROL AND SWITCH SETTINGS - TM-11-5820-670-300099

TM 11-5820-670-30

2-5. AUDIO POWER OUTPUT AND DISTORTION TEST. (CONT)

INITIAL EQUIPMENT CONTROL SETTINGS

Set equipment controls as indicated in the following table.

CONTROL AND SWITCH SETTINGS

POSITION/SETTING

CONTROL OR SWITCH

EQUIPMENT

T/R

MODE SWITCH

TS-25751ARC-131

Maximum (clockwise)

VOL

DIS

SQUELCH

60.05 MHz

FREQ sel

Freq dial

AN/URM-127

X 100

FREQ RANGE MULTIPLIER

As required in test

OUTPUT CONTROL

procedures.

METER

FUNCTION switch

TS-723A/U

AF-RF switch

Meter RANGE

X 10

Freq RANGE

100

Coarse FREQUENCY

Adjust to 60.05 MHz.

BAND SWITCH and RF TUNING CONTROL

AN/URM-103

EXT MOD

FUNCTION switch

LO 0-10 KUV

RF OUTPUT switch

LO-HI RF SET to LINE control

Adjust for 10 microvolt

and LO RF UV

output.

DEVIATION RANGE KHZ switch

Midrange position

DEVIATION control

NOTE

With mode switch in T/R position, external power is applied to the receiver-transmitter.

The receiver-transmitter requires a 1-minute warmup before measurements are made.

TEST PROCEDURE

Set FUNCTION switch on signal generator AN/URM-103 to EXT MOD and adjust frequency for a

60.05 MHz, 10 microvolt output.

2. Adjust AN/URM-127 for 8 kHz deviation as indicated on AN/URM-103 DEVIATION KHZ meter.

3. Determine that RECEIVER AUDIO OUTPUT J107 HI-LO are connected to METER terminals of

spectrum analyzer TS-723A/U.

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