TM 11-5840-208-30-1
b.
Check the azimuth controls and the B-scope indicator as follows:
(1)
Set the DETENT switch at OFF, and place the A AZIMUTH control in detent.
(2)
Rotate the LOWER BEAM AZIMUTH control clockwise. The AZIMUTH counter reading increases, and
the azimuth strobe moves to the right.
(3)
Rotate the LOWER BEAM AZIMUTH control counterclockwise.
The AZIMUTH counter reading
decreases, and the azimuth strobe moves to the left.
(4)
Make a short, very thin vertical mark with a grease pencil on the B-scope.
(5)
Using the LOWER BEAM AZIMUTH control, superimpose the azimuth strobe on the mark, with the last
movement of the control in the clockwise direction. Note the reading of the AZIMUTH counter.
(6)
Repeat the step in (5) above, with the last movement of the control in the counterclockwise direction.
The same AZIMUTH counter reading should be obtained.
(7)
Set the DETENT switch to DETENT RELEASE and check to see that the SET DETENT light is on.
(8)
Rotate the A AZIMUTH control clockwise. The AZIMUTH counter reading decreases, and the strobe
moves to the right.
(9)
Rotate the A AZIMUTH control counterclockwise. The AZIMUTH counter reading increases, and the
strobe moves to the left.
c.
Check the range controls and the B-scope as follows:
(1)
Rotate the LOWER BEAM RANGE control clockwise. The RANGE counter reading increases, and the
range strobe moves. up.
(2)
Rotate the LOWER BEAM RANGE control counterclockwise. The RANGE counter reading decreases,
and the range strobe moves down.
(3)
Rotate the A RANGE control clockwise. The RANGE counter reading decreases, and the range strobe
moves up.
(4)
Rotate the A RANGE control counterclockwise. The RANGE counter reading increases, and the range
strobe moves down.
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