Cessna 172N - Page 142

SECTION
7
AIRPLANE
&
SYSTEMS
DESCRIPTIONS
CESSNA
MODEL
172N
and
its
associated
NAV/COM
receiver
audio
simultaneously
with
the
trans-
mitter
selector
switch,
If automatic
audio
selection
is
not desired,
the
Auro
selector
switch
should
be
placed
in
the
oFF
(center)
position.
AUDIO
SETECIOR
SWIICHES
The
audio
selector
switches,
labeled
NAv/coM
1,
a
and
3
and ADF
1
and
2, allow
the
pilot
to
initiaily
pre-tune
all
NAv/iou
and
ADF
re-
_ceivers,
and
then
individually
select
and
listen
to any
receiver
or
com-
bination
of
receivers.
To
listen
to a specific
receiver,
first
check
that
the AUTO
selector
switch
is
in the
OFF
(center)
positibn,
then
place
the
audio
selector
switch
corresponding
to
that
receiver
in
either
the
SpEAKEp
(up)
or
PHONE
(dourn)
position.
To turn
off
the
audio
of the
selected
re-
ceiver,
place
that
switch
in the
oFF
(center)
position.
If
desired,
the
audio
selector
switches
can
be
positioned
to-pbrmit
the
pilot
to
listen
to
one
receiver
on
a headset
while
the
passengers
listen
to
another
receiver
on
the
airplane
speaker.
The ADF
1
and
2
switches
may
be used
anytime
ADF
audio
is
desired.
If
the
pilot
wants
only
ADF
audio,
for station
identiJication
or
other
rea-
sotls'
the
AUTO
selector
switch
(if
in use)
and
all other audio
selector
switches
should
be in
the
OFF
position.
If
simuttaneous ADF
and
NAV/
coM
audio
is acceptable
to
the
pilot,
no
change
in the
existing
switch
positions
is
required.
Place
the
ADF
1 or
2
switch in
either
Ine
SpneKER
or
PHoNE position
and
adjust
radio
volume as
desired.
NOTE
rf
the
NAv/coM
audio
selector
switch
corresponding
to
the
selected
transmitter
is in
the
pHoNE
position
with
the
Allro
selector
switch
in
the
SPEAI(ER
position,
all
audio
selector
switches
placed
in the
pHoNE
position
will automatically
be
connected
to
both the
airplane
speaker
and
any
headsets
in
use.
MICROPHONE-HEADSET
-
_The
microphone-headset
combination
consists
of
the microphone
and
headset
combined
in a
single
unit
and
a
microphone
keying
switch
located
on
the
left
side
of
the
pilotts
control
wheel.
the
micr-ophone-headset
per-
mits
the
pilot
to
conduct
radio
communications
withotrt
internrpting
otfier
control
operations
to handle
a
hand-held
microphone.
Also,
frssenge"s
need
not
listen
to
all
communieations.
The
mi-crophone
and
triaaset-jacks
are
located
near
the
lower
left
corner
of
the instrriment
panel.
7
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