TM 11-5840-281-12-1
4-27. PRELIMINARY SERVICING AND ADJUSTMENT. (CONT)
CONTROL
POSITION
LO TUNE
Midrange
FTC
OFF
TRANSMITTER
OFF
STC
OFF
VIDEO GAIN
fully counterclockwise
POWER
OFF
4.
Direct second person to set following controls on pulse generator to positions indicated.
CONTROL
POSITION
RANGE MILES
5
SCAN
OFF
SCAN MODE
SEARCH
5.
On transmitter control panel, set all four switches to OFF.
6.
On transmitter control-indicator, press CONTROL LOCAL/REMOTE switch to indicate LOCAL.
7.
On local control monitor, place controls below to positions indicated.
CONTROL
POSITION
LOCAUREMOTE
RT
SCAN MODE
SRCH
ANT PLZN
LIN
FTC
OFF
STC
OFF
IF GAIN
Midrange
8.
On receiver-transmitter main power panel, set all four switches to OFF.
9.
On receiver, adjust R11 LINEAR GAIN control fully clockwise and R8 LO TUNE ADJ control to midrange
position.
10.
Carefully disconnect waveguides (3 and 5) from their respective filters (2 and 4) by loosening two waveguide
plug connectors.
11.
Remove filter FL5 (2) by removing four screws, flat washers, and lockwashers from FL5 flange (6), and two
screws, flat washers, and lockwashers from clamp (7). Retain hardware for reinstallation.
12.
Remove filter FL6 (4) by removing four screws, flat washers, and lockwashers from FL6 flange (8), and four
screws, flat washers, and lockwashers securing two clamps (9). Retain hard-ware for reinstallation.
13.
Install appropriate replacement filters on waveguides. Installation is reverse of removal procedure in steps 10
through 12.
4-79
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