TM 11-5840-281-12-1
3-6.
OPERATIONAL CHECK. (CONT)
OPERATIONAL CHECKS TABLE (CONT)
ACTION
RESULT
63.
On master control-indicator, return
Strength of close-in radar returns return to normal on both control-
STC switch to OFF position
indicators.
64.
On master control-indicator, rotate IF
Radar returns disappear on both control-indicators.
GAIN AZ and EL controls fully
counter- clockwise.
65.
On master control-indicator, rotate IF
Radar returns reappear with noise (grass) in background on both control-
GAIN AZ and EL controls fully
indicators.
clockwise.
66.
On master control-indicator, rotate
Vertical height of close-in radar returns decreases as EL TARGET control
EL TARGET control clockwise
is rotated toward NARROW position.
toward NARROW position.
67.
On master control-indicator, place
ANTENNA control to the following
positions:
a. U position
a. AZ TILT/BITE meters indications increase and blanked portion of range
marks on elevation displays go up.
b. D position
b. AZ TILT/BITE meters indications decrease and blanked portion of range
marks on elevation displays go down.
c. L position
c. Blanked portion of range marks on azimuth displays go down.
d. R position.
d. Blanked portion of range marks on azimuth displays go down.
37.
FRONT PANEL AND INDICATOR LAMP REPLACEMENT.
305NE172
3-20
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