Specifications

TM 11-5820-670-30
2-18. TRANSMITTER SIDETONE TEST. (CONT)
EQUIPMENT
TS-2575/ARC-131
C-1611 D/AIC
AN/URM-127
TS-723A/U
AN/URM-103
TEST PROCEDURE
CONTROL AND SWITCH SETTINGS
CONTROL OR SWITCH
MODE SWITCH
SQUELCH
VOL
FREQ sel
Transmit-lnterphone selector
Freq dial
FREQ RANGE MULTIPLIER
OUTPUT CONTROL
FUNCTION switch
RANGE
AF-RF switch
Meter RANGE
BAND SWITCH and RF TUNING CONTROL
FUNCTION switch
RF OUTPUT switch
LO-HI RF SET to LINE control and
LO RFUV
DEVIATION RANGE KH7 switch
DEVIATION control
POSITION/SETTING
T/R
DIS
Maximum (clockwise)
31.00 MHz
1
100
X 10
As specified in procedure.
SET LEVEL
X 10
AF
+ 20 db
Adjust to 31.00 MHz.
1000 Hz
LO 0-10 KUV
Adjust for 10 microvolt
output.
10
Adjust for 8 kHz deviation.
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
2-37