Specifications

TM 11-5820-670-30
2-14. TRANSMllTER DISTORTION NARROW BAND TEST. (CONT)
INITIAL EQUIPMENT CONTROL SETTlNGS
Set equipment controls as indicated in the following table.
CONTROL AND SWITCH SETTINGS
EQUIPMENT
TS-2575/ARC-131
AN/URM-127
ME-57/U
TS-723A/U
C-1611 D/AIC
CONTROL OR SWITCH
MODE SWITCH
VOL
SQUELCH
FREQ sel
TRANSMIT switch
HI-LO switch
Freq dial
FREQ RANGE MULTIPLIER
OUTPUT CONTROL
TUNING
DEVIATION RANGE – KC
FREQUENCY RANGE – MC
Selector switch
FUNCTION switch
RANGE
AF-RF switch
Transmit-lnterphone selector
RECEIVER 1 switch
POSITION/SETTING
T/R
Maximum (clockwise)
DIS
30.00 MHz
OFF
LO
10
X 100
As specified in test
procedure.
30 MHz
20
20.55 MHz
TUNE
DISTORTION
X 10
AF
1
ON
TEST PROCEDURE
1. Adjust AN/URM-27 OUTPUT CONTROL for a 0.39 volt output level as indicated on ME-30(E)/U
voltmeter.
2. Place test set TRANSMIT switch to ON.
3. Measure transmitter distortion at the output of ME-57/U.
STANDARD. 10 percent maximum
4. If reading on modulation meter is above 10 percent, see troubleshooting chart 2-17.
5. Set test set TRANSMIT switch to OFF.
6. Set test set FREQ sel to 75.95 MHz.
7. Repeat steps 1 through 5.
2-29