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 TM 55-1510-218-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
Echo display will change
in shape and location
only. Weather targets will
not change shape or loca-
tion. Ground targets will
not change shape or loca-
tion. Ground targets are
selected as a function of
tilt.
c. Test procedure: Observe
screen for proper display. Test
display consists of two green,
two yellow, and a red band on
a 120 scan. The word TEST
will be displayed in upper
right corner. Operating mode
selected by MODE switches
(either MAP, WX, or WXA)
has been displayed in lower
left corner. If WXA has becn
selected, red band in the test
pattern will flash on and off.
Range will be displayed in up
per right comer beneath
TEST and appropriate range
mark distances will appear
along right edge of screen.
Complete test patterns may
be seen only 80 mile range
or higher. Flying level at an
altitude of 8,000 to 10,000
feet will allow mapping of
ground targets to a range of
approximately 100 miles.
d. Antenna stabilization check:
4-39
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