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 TM 1-1510-223-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
G. AVIONICS FLIGHT CHECKS (CONT)
d.
Frequency selector switches Select required
test frequencies.
e.
Mode selector - As required.
f.
Volume control - As required.
g.
Squelch switch - As required.
h.
Fly aircraft to a point 35 nautical miles
away from test station.
i.
Communicate with test station when 20
miles away and again at 35 miles.
j.
At
35
nautical
miles
maintain
communication with test station each 10
while flying a 360flat turn (not to exceed 5
bank). Verify that communication is
uniformly loud and clear through these
tests.
k.
Repeat procedure for frequencies in low,
middle, and high ranges.
* 6. VHF radio set Check as follows
a.
Altitude - 1000 feet AGL.
b.
Transmitter selector switch (audio control
panel) - #1 or #2.
c.
Off-volume control - Turn clock- wise, set
volume as required.
d.
Frequency selector - Set desired frequency.
e.
Fly aircraft to a point 40 nautical miles away
from test station.
f.
At
40
nautical
miles,
maintain
communication with test station each 10
while flying a 360flat turn (not to exceed 5
bank). Verify that
4-14
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