Cessna 172P Pilot's Operating Handbook And Flight Manual page 258

9
AUDIO CONÎROL PANELS
PII,OT'S
OPER,ATING HANDBOOK
SUPPLEMENT
3.
COM
BOTH Selector
Su¡ttch
--
SELECT
the
sa,ûre SpEAKE!R,
or
PHONE
position which
was
eet on the COM AUTO
Felector
switch
to allow both COM recsivers to
be
monitored at the
same
tlme.
NOTE
The
combinatiou of placingthe
COM AUTO
switcb in the
SPEAKER
positlon
and the COM BOTH switch
ln
the
PHONE
position (or
vice versa) is not
nomally
recom-
mended as
it
will
oa,uae
audio
from
both communicotions
receivers (and any otheruavigation
reoelver with its audlo
selector
switch in
the PHONE
position) tobeheardonboth
the airplane speaker
and
the headset
simultaneously.
4.
Audio SPEAKE¡R/PHONE Selector Switchos --
SELECT
desired
SPEAKER or PHONE
audio
position only if
COM
AUTO
switch
is
not
used.
ã.
INT Control Knob -- ROTATE
as deeired
to increase or
deorease
intercom audio volume.
6.
ANN LTS Switch:
a,,
TEST
Position
--
SELECT
to verlfy
operation
of
marker
beacon,
BC and RN annunciator lights (when installed).
b.
DAY
Position --
SELECT
for typical daytime tighting.
c.
NITE Position --
SELECT
for typical night lighting.
NOTE
In
the
NITE position, fu¡ther lighting adjustment for the
Mkr Bcn, BC and RN
(when installod)annunoiator lights
can
be
obtained using the RADIO LT dimming rheoetat
knob.
sEcTroN
5
PERFORMANCE
There
is
no change
to the
airplane
performanoe
when either
of these
audio
control panels
is
instolled.
8 90
May
1980