e. Adjust the VERTICAL and HORIZONTAL GAIN controls R1701
(Figure 47) to expand the PPI display until the 10-mile range mark is
1/8 inch from the edge of the CRT and all range mark rings have the
best obtainable circularity (Figure 52).
f. You have completed the PPI display alignment.
In doing so,
you have ensured proper positioning and range of the PPI display.
4.
Using this checklist,
review
the
location
of
the
following
components and controls.
____ SEARCH VERTICAL CENTERING control R1504.
(See Figure 50.)
____ SEARCH HORIZONTAL CENTERING control R1505.
(See Figure 50.)
____ PPI GATE LENGTH control R1511.
(See Figure 47.)
____ HORIZONTAL GAIN control R1701.
(See Figure 47.)
____ VERTICAL GAIN control R1701.
(See Figure 47.)
5.
Using this checklist, review the control settings.
____ INTENSITY control R2404 clockwise for a just visible time base
sweep. (See Figure 48.)
____ RANGE MARK GAIN control R1512 for appearance of range marks.
(See Figure 49.)
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