TM 11-5840-281-12-1
3-6.
OPERATIONAL CHECK. (CONT)
ACTION
RESULT
Well-defined radar video just below bloom level on both control-indicators.
36. On both control-indicators, rotate
VIDEO GAIN control clockwise until
radar video begins to defocus
(bloom) then rotate slightly counter-
clockwise.
37. On master control-indicator, place
Radar transmitter no longer transmitting.
TRANSMITTER switch to OFF
position.
38. On both control-indicators, place PPI
Ppi display changes to offset centering on both control- indicators.
CENTERING
NORM-
OFFSET
switch to OFFSET position.
39. On both control-indicators, rotate
Adequate range of controls to offset ppi center to edge of display at all
PPI CENTERING VERT and HORIZ
compass rose bearings.
control knobs through their ranges.
40. On both control indicators, place PPI
Ppi sweep centered on both control-indicators.
CENTERING
NORM-
OFFSET
switch to NORM position and adjust
VERT and HORIZ controls to center
ppi sweep.
41. On master pulse generator, place
Ppi sweep rotates clockwise on both control-indicators.
SCAN switch to ON position.
Proper sweep lengths and correct number and linear spacing of range
42. On both pulse generators, place
marks occur for each switch position.
RANGE MILES switch to each of its
positions in turn.
43. On both pulse generators place
Presentation changes from ppi to beta display on both control-indicators.
RANGE MILES switch to position 10.
Each display has an elevation and azimuth cursor, servo data Information
On master pulse generator, place
(blanked sector in range marks), and properly spaced range marks.
SCAN MODE switch to NORM
position.
Artificial sweep trace appears on elevation display on both control-
44. On both pulse generators, place
indicators.
ANGLE VOLTS switch to EL
position.
Artificial sweep trace appears on azimuth display of both control-indicators.
45. On both pulse generators, place
ANGLE VOLTS switch to AZ
position.
3-17
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