Specifications

TM 11-5820-670-30
2-15. TRANSMITTER SIGNAL PLUS NOISE-TO-NOISE RATlO TEST. (CONT)
INITIAL EQUIPMENT CONTROL SETTINGS
Set equipment controls as indicated in the following table.
CONTROL AND SWITCH SETTINGS
EQUIPMENT
RT-823/ARC-131
TS-2575/ARC-131
AN/URM-127
ME-30(E)/U
TS-723A/U
C-1611 D/AIC
CONTROL OR SWITCH
XMTR HI-LO
MODE SWITCH
VOL
SQUELCH
FREQ sel
HI-LO switch
TRANSMIT 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
LO
T/R
Maximum (clockwise)
DIS
30.00 MHz
LO
OFF
10
X 1000
As specified in procedure.
30.00 MHz
20
20-55 MHz
TUNE
SET LEVEL
X 10
AF
1
ON
PROCEDURE
1. Adjust AN/URM-127 OUTPUT CONTROL for a 0.39 volt output level as indicated on
ME-30(E)/U.
2. Place test set TRANSMIT switch to ON.
3. Adjust TS-723A/U signal INPUT control for 0 db reference on meter.
4. Remove the modification from the receiver/transmitter by disconnecting AN/URM-127 from test
set J104 HI-LO terminals.
5. Observe difference in TS-723A/U meter indication from the 0 db reference established in
step 3.
STANDARD. 35 db difference
6. If meter indication on spectrum analyzer does not indicate 35 db, see troubleshooting
chart 2-18.
2-31