TM 11-5840-208-30-1
the two readings should be numerically the same as the field correction. If it is not, the error should be
noted and a correction carried until the radar can be correctly boresighted.
Azimuth Orientation. The purpose of azimuth orientation is to obtain the correct reading on the azimuth
b.
counters.
(1)
Azimuth orientation (electrical method).
(a) Place the RANGE SELECTOR switch in the 3750 M position and the EXPANDED SWEEP DELAY
switch to the range which will display the orienting point. Rotate the antenna until it is pointed
generally toward the orienting point. Move the antenna in elevation, if necessary, until the orienting
point shows up as a target on the B-scope.
(b) Set the DETENT switch to the OFF position, and place the A AZIMUTH control in detent.
(c) Rotate the LOWER BEAM AZIMUTH control until the azimuth strobe bisects the target (orienting
point) on the B-scope.
Note: It may be necessary to adjust the IF GAIN con-trol to reduce the size of the echo
so that it can be more easily bisected.
(d) Hold the RADAR LOCATION AZ ORIENT switch in the ADD (or SUBT) position until the AZIMUTH
counter reads the azimuth to the orienting point.
(e) Set the DETENT switch to the AZIMUTH ORIENT position, and place the A AZIMUTH and LOWER
BEAM AZIMUTH controls in detent.
(f) Apply the field correction (a(l) above) with the sign changed to the reading on the computer
AZIMUTH counter. Set the resulting figure into the azimuth counter on the frame of the radar.
(2)
Azimuth orientatioh (optical method).
(a) Position the antenna so that the orienting point is centered in the orienting telescope. (Comply with
the instructions in the note in a (3) above.)
(b) Set the azimuth to the orienting point into the azimuth counter bn the frame of the radar.
(c) Set the DETENT switch to the AZIMUTH ORIENT position, and place the A AZIMUTH and LOWER
BEAM AZIMUTH controls in detent.
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