TM 11-5840-281-12-1
36.
OPERATIONAL CHECK. (CONT)
ACTION
RESULT
WARNING
To prevent exposure to hazardous rf radiation, make sure no personnel are within an 80-
foot (24.5 m) radius of radar site when performing steps 56 through 58.
Radar transmitter transmitting.
55. On master control-indicator, place
TRANSMITTER switch to WIDE PLS
position and press HV ON indicator
switch.
56. On master pulse generator, place
Beta scans stop on azimuth and elevation displays. Ground target return
SCAN switch to OFF position,
visible on stationary beta scans on both control-indicators.
stopping antenna scan on any
convenient ground return.
Width of ground target return decreases on beta displays on both control-
57. On master control-indicator, place
indicators.
TRANSMITTER switch to NAR PLS
position and press HV ON indicator
switch.
NOTE
Perform steps 58 through 67 when operating radar set in areas where heavy precipitation is
common. These checks test the ability of radar set to reduce clutter, and therefore can only
be performed when precipitation or ground clutter is present on radar displays.
58. On master control-indicator, place
LIN indicator lamp extinguishes and CIR indicator lamp lights on both
ANT POL switch to CIR position.
control-indicators. Any precipitation clutter on radar displays is reduced.
59. On master control-indicator, return
CIR indicator lamp extinguishes and LIN indicator lamp lights on both
ANT POL switch to LIN position.
control-indicators.
60. On master control-indicator, place
Large blocks of ground and precipitation clutter are reduced, with only
FTC switch to LIN position.
leading edge of radar returns visible on both control-indicators.
61. On master control-indicator, place
Blocks of ground and precipitation clutter are further reduced.
FTC switch to LOG position.
62. On master control-indicator, place
Strength of close-in radar returns decreases on both control-indicators.
STC switch to ON position.
3-19
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