Audio Selector Switches; Com Auto Audio Selector Switch - Cessna 1980 182Q Pilot's Operating Handbook And Flight Manual

CESSNA
MODEL 182Q
SECTION 7
AIRPLANE & SYSTEMS DESCRIPTioNS
The action of selecting a particular transmitter using the transmitter
selector switch simultaneously selects the audio amplifier associated with
that transmitter to provide speaker audio. For example, if the number one
transmitter is selected, the .audio amplifier in the number one NAV / COM
is also selected and is used for ALL speaker audio. In the event the audio
amplifier in use fails, as evidenced by loss of all speaker audio, selecting
an alternate transmitter will reestablish speaker audio using the alternate
transmitter audio amplifier. Headset audio
IS
not affected by audio
amplifier operation.
AUDIO SELECTOR .SWITCHES
Both audio control panels (see figure 7-10) incorporate three-position
toggle-type audio selector switches for individual control of the audio
from systems installed in the airplane. These switches allow receiver
audio to be directed to the airplane .speaker or to a headset, and heard
singly or in combination with other receivers. To hear a particular
receiver on the airplane speaker, place that receiver's audio selector
switch in the up (SPEAKER) position. To listen to a receiver over a
headset, place that receiver's audio selector switch in the down (PHONE)
position. Thecenter (OFF) position turns off all audio from the associated
receiver.
NOTE
Volume level is adjusted uSing the individual receiver
volume controls on each radio.
A special feature of the audio control panel used when one or two
transmitters are installed is separate control of NA V and COM audio from
the NA V / COM radios. With this installation, the audio selector switches
labeled NAV, 1 and 2 select audio from the navigation receivers of the
NAV /COM radios only. Communication receiver audio is selected by the
switches labeled COM, AUTO and BOTH. Description and operation of
these switches is described in later paragraphs.
When the audio control panel for three transmitters is installed, audio
from both NAV and COM frequencies is combined, and is selected by the
audio selector switches labeled NA V / COM, 1, 2 and 3.
• . r
COM AUTO AUDIO SELECTOR SWITCH
The audio control panel used with either one or two transmitters
incorporates a three-position toggle switch, labeled COM AUTO,.which is
provided to automatically match the audio of the appropriate NAV / COM
communications receiver to the transmitter selected by the transmitter
selector switch. When the COM AUTO selector switch is placed in the up
1 October 1979·
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