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 TM 55-1510-218-MTF
TROUBLESHOOTING
PROCEDURE
REFERENCE
120 without jumping Ab-
sence of the strobe line indi-
cates that the antenna is not
operating.
j. Scan/stab switch - HOLD po-
sition. Strobe line should dis-
appear and the test pattern
display should freeze on the
indicator.
k. Scan/stab switch - 60. Scan
area should now be limited to
60. Strobe line should reap
pear and sweep 30 about
the aircraft centerline.
l. Scan/stab switch - 120.
m. Mode selector - 25.
n. Wx/GAIN control - Wx.
o. Antenna tilt control - +4.
p. BRT control - As desired. Am-
ber fault lamp should be ex-
tinguished, indicating satisfac-
tory transmitter power and
satisfactory receiver gain.
q. Antenna tilt control - Vary be-
tween 0. and+ 15 and note
that close-in "ground clutter"
appears at lower tilt settings
and any local moisture-laden
weather appears at higher tilt
settings.
4-37
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