Cessna 172P - Page 342

21
CESSNA
4OO
MARKER
BEACON
(TYPE
n-402A)
PILOT'S
OPER,ATING
HANDBOOK
SUPPLEMENT
provides
the
pilot
with
HI-LO sensitivity
selection and a TEST
position
to
verify
operation
of aII
annunciator
lights.
The
small, inner
control knob
labeled
OFF/VOL,
turns the
set on
or off
and adjusts the
audio listening
level.
The
large,
oute¡ control
knob
tabeled BRT,
provides
light
dimming
for
the marker
beacon lights.
When
the Cessna 400
Markor
Beacon controls
are
incorporated
in
an
audio
control
panel
incorporated
with two or less
transmitters a marker
Beacon
audio
level adjustment
potentiometer
and an annunciator
lights
minimum
dimming
potentiomster
are mounted
on the audio control
panel
circuit
board.
Potentiometer
adjustments
cannot be
accomplished exter-
nally. However,
if readjustments
a,re
desired, adjustments can
be
made
in
accordance wittr
instructions
found
in the Avionics Installations Ser-
vice/Parts
Manual for this aircraft.
MARKER
FACILITIES
MARKER
IDENTTFYING
TONE
LIGHT*
Inner
&
Fan
Middle
Outer
Continuous
6 dots/Sec
(3000
Hz)
Alternate
dots
and
dashes
(1800
Hz)
2 dashes/sec (400
Hz)
\4rhile
Amber
Blue
ïVhen
the
identifying
tone
is keyed,
the respective indicating
light
will blink
accordingly.
2
30.May
1980