TM 5-6675-330-12&P
10. Sighting Telescope Alignment.
Place a single prism or a triple prism cluster, with
only the center prism uncovered, at a distance of
30 to 50 meters from the EDM instrument, Using
the vertical and horizontal tangent screws,
position the telescope crosshairs on the center of
the prism. Turn the instrument power on and
select the AIM mode, If there is no signal
indication, search the area near the prism until
the signal is acquired. Using the tangent screws
maximize the signal. (see Target Acquisition,
page 14). Remove covers from vertical (10) and
horizontal (11) crosshair adjustments. Using
horizontal adjustment (11), position vertical
crosshair to center of prism. Using vertical
adjustment (10), position horizontal crosshair to a
point 4.5 inches above center of prism (see
Figure 10], After adjustments, re-maximize signal
to insure proper alignment, Replace adjustment
covers.
Figure 10 - Telescope Alignment
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