Textron Cessna 172R - Page 487

CESSNA
MODEL
172R
SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
20
-
FAA
APPROVED
TELEPHONE MODE
(TEL)
-
The
telephone
mode
is
not
available
on
this installation.
SPLIT
MODE
(COM
1/2
OR COM
2/1)
--
Moving
the
mic selector
switch
to
COM 1/2
places
the
KM A
28
into
“split
mode”. This
places
the
pilot
on
Com
1
and the
copilot
on
Com
2.
Switching
to
COM
2/1
will
reverse
the
"split
mode*
radio
selection.
For
more
information
regarding
split
mode
operations,
consult
the
Bendix/King
Silver
Crown
Plus Avionics
Systems
Pilot’s
Guide,
P/N
006-18110-0000.
5.
SWAP
INDICATOR
-
The
swap
function
is
not
available
on
this
installation.
6.
TRANSMIT
INDICATOR
-
This
indicator
illuminates
when either
Push-
to-Talk
(PTT)
switch
is
pressed.
7.
SPEAKER SWITCH
(SPR)
-
This
switch
will
place
all selected
audio
on
the
cockpit speaker
when
selected.
8.
CREW
ICS/MUSIC
1
MUTE
BUTTON
(ICS)
-
The
front
panel
ICS
button
controls
muting
of
the
entertainment
source.
Pushing
this
button
places
the
ICS
in
Karaoke
(or
sing
along)
mode,
which
inhibits
the
soft
mute
feature.
The
soft
mute
feature
assures
that
the
aircraft
radio
transmissions
will
not
be
missed
due
to
entertainment
playing.
When
there is
radio
reception
or
intercom
conversation,
the
music
level is
dropped
to
background
level.
When the
radio
or
intercom
traffic
ceases,
the level
gradually
returns to
normal.
Karaoke allows
the
music
to
continue
uninterrupted
by
intercom
or
radio
traffic
when
cockpit
workload
is
appropriate.
Pushing
the
button
again
will
release
the
mute
inhibit
function.
In
split
mode,
the
pilot
and
copilot
are
isolated
from
each
other
on
the
intercom,
simultaneously
using
their
respective
radios.
Depressing
the
ICS
button
in
split
mode
will
activate
VOX
intercom
between the
pilot
and
copilot
positions.
This
permits
intercommunication
when
desired
between
the
crew.
Pressing
the
ICS
button
again
disables the
crew
intercom
function.
9.
PHOTOCELL FOR
AUTOMATIC
DIMMING
OF
MARKER
BEACON
LIGHTS
AND
SELECT
BUTTON
-
The
photocell
in
the
faceplate
automatically
dims the marker
lights
as
well
as
the
green
annunciators
in
the
Speaker
Audio
Select
Buttons
for
night
operation.
Figure
1
.
Bendix/King
KMA
28
Audio
Selector
Panel
(Sheet
3
of
5)
Dec
30/00
S20-7
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