CONTROL AND SWITCH SETTINGS - TM-11-5820-670-300129

TM 11-5820-670-30

2-18. TRANSMITTER SIDETONE TEST. (CONT)

CONTROL AND SWITCH SETTINGS

POSITION/SETTING

CONTROL OR SWITCH

EQUIPMENT

T/R

MODE SWITCH

TS-2575/ARC-131

DIS

SQUELCH

Maximum (clockwise)

VOL

31.00 MHz

FREQ sel

Transmit-lnterphone selector

C-1611 D/AIC

100

Freq dial

AN/URM-127

X 10

FREQ RANGE MULTIPLIER

As specified in procedure.

OUTPUT CONTROL

SET LEVEL

FUNCTION switch

TS-723A/U

X 10

RANGE

AF-RF switch

+ 20 db

Meter RANGE

Adjust to 31.00 MHz.

BAND SWITCH and RF TUNING CONTROL

AN/URM-103

1000 Hz

FUNCTION switch

LO 0-10 KUV

RF OUTPUT switch

LO-HI RF SET to LINE control and

Adjust for 10 microvolt

LO RFUV

output.

DEVIATION RANGE KH7 switch

Adjust for 8 kHz deviation.

DEVIATION control

TEST PROCEDURE

1. Adjust AN/URM-127 OUTPUT CONTROL for 0.39 volts output.

2. With TS-723A/U function switch at SET LEVEL, adjust signal INPUT control for a 0 db indication

on the meter

3. Place test set WIDEBAND-NAR BAND switch to WIDEBAND.

4. Disconnect CG-3370/U (W8) from fuseholder MX-1730/U and connector J112 on test set.

5. Connect CG-3370/U (W6) to J112 and J113 on the test set.

6. Place test set TRANSMIT switch to ON.

7. Measure db level change on TS-723A/U meter output with reference to step 2.

STANDARD. With a 0 db reference, change in db should be 6 + _2db.

8. If reading on spectrum analyzer is not within limits of the standard, see troubleshooting

chart 2-21.

9. Place test set TRANSMIT switch to OFF and reinstall CG-3370/U (W8) from J112 to fuseholder

MX-1730/U

10. Repeat steps 2 through 9 adjusting frequency selectors of test set for frequencies of 51.50 MHz

and 6895 MHz

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