Cessna 172P - Page 346

21
CESSNA
4OO
MARKEN,
BEACON
(TYPE
R-402A)
PII,OT'S
OPEN,ATING
HANDBOOK
SUPPLEMENT
NOTE
Due
to
the
short distance
typical
between
the
middle
marker
and inner
marker,
audio identification
of the
inner
marker
may
not
be
possible
if
muting
is activated
over
the
middle
marker.
MAR,KER,
BEACON
OPERATING
PROCEDURES FOR
USE
WITH
AUDIO
CONTN,OL
PANELS PROVIDED
WITH THREE
TRANSMIT-
TERS.
(REF.
FIG.2)
1.
OFF/VOL
Control
--
TURN
to
VOL
position
and adjust
to
desired
listening
level.
Clockwise
rotation
increases
audio
level,
2.
HI/LO
Sen Switch --
SELECT
HI
position
for
airway
fl,ying or LO
position
for
ILS
approaohes.
3.
SPKR/PHN
Switch --
SELECT
speaker
or
phone
audio.
4. BRT
Control --
SELECT
BRT
(full
clockwisè).
ADJUST as
desired
when
illuminated
over
marker
beacon.
5.
TEST
Switch --
PRESS
to TEST
position
and verify
that
all marker
beacon
annunciator
lights
will
illuminate
fult bright to indicate
lights
are
operational.
sEcTtoN
5
PERFORMANCE
There is no change to
the airplane
performence
when this avionic
equipment
is installed.
However, the installation
of an
externally
mounted
antenna or several
related external
antennas, will result in a minor
reduction in cruise
performance.
6
30
May
1980