(2) MODE switches - As required.
(3) RANGE switches - 80.
(4) 120/60 degree button - OFF.
(5) TILT control - Move up
or down to observe targets above or
below aircraft. Echo display will change in
shape and location only. Weather targets
will not change shape or location. Ground
targets are selected as a function of tilt.
Test procedure: Observe screen
for proper display.
Test display consists of two
green, two yellow, and a red band on a 120 degree
scan. The word TEST will be displayed in upper
right corner. Operating mode selected by MODE
switches, either MAP, WX, or WXA will be
displayed in lower left corner. If WXA has been
selected, red band in the test pattern will flash on
and off. Range will be displayed in upper right
corner beneath TEST and appropriate range mark
distances will appear along right edge of the
screen. Complete test patterns may be seen only
on 80 mile range or