TM 11-5840-281-12-1
3-6. OPERATIONAL CHECK. (CONT)
OPERATIONAL CHECKS TABLE (CONT)
ACTION
RESULT
28. On both control-Indicators,
Adequate control of sweep intensity level and focus. If above
adjust FOCUS and INTENSITY
result cannot be obtained, refer to higher category of
controls as necessary for a
maintenance.
sharp, well-defined sweep.
29. On both control-indicators,
None.
adjust VIDEO GAIN control
fully counterclockwise.
30. On master control-indicator,
Ppi sweep rotates clockwise on both control-indicators.
place SCAN switch to ON
position.
31. On both control-Indicators,
Ppi display with 20-mile range on both control-indicators.
place RANGE MILES switch to
position 20.
32. On master control-indicator,
Receiver noise (grass) appears on ppi display on both
rotate IF GAIN AZ and EL
control-indicators.
controls fully clockwise.
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 33 through
36.
33. On master control-indicator,
HV ON indicator switch lights.
place TRANSMITTER switch to
WIDE PLS position and press
HV ON indicator switch.
34. On master control-indicator,
Ppi sweep stops rotating on both control-indicators. Ground
place SCAN switch to OFF
return appears in same position on ppi display of both
position to stop azimuth
control-indicators.
antenna scan on any con-
venient ground return.
35. On master control-indicator,
Maximum radar video return appears on both control-
adjust LO TUNE control for
indicators.
maximum radar video return
on both control-indicators.
3-16
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