Avionics Support Equipment; Audio Control Panel; Transmitter Selector Switch; Automatic Audio Selector Switch - Cessna TR182 1979 Pilot Operating Handbook

CESSNA
MODEL TR182
SECTION 7
AIRPLANE
&
SYSTEMS DESCRIPTIONS
inspection by momentarily turning on the master switch and actuating the
vane in the wing. The system is operational if the warning horn sounds as
the vane is pushed upward.
AVIONICS SUPPORT EQUIPMENT
The airplane may, at the owner's discretion, be equipped with various
types of avionics support equipment such as an audio control panel,
microphone-headsets, and static dischargers. The following paragraphs
discuss these items. Description and operation of radio equipment is
covered in Section 9 of this handbook.
AUDIO CONTROL PANEL
Operation of radio equipment is covered in Section 9 of this handbook.
When one or more radios is installed, a transmitter I audio switching
system is provided (see figure 7-12). The operation of this switching
system is described in the following paragraphs.
TRANSMITTER SELECTOR SWITCH
A rotary type transmitter selector switch, labeled XMTR SEL, is
provided to connect the microphone to the transmitter the pilot desires to
use. To select a transmitter, rotate the switch to the number corresponding
to that transmitter. The numbers 1,2 and 3 above the switch correspond to
the top, second and third transceivers in the avionics stack.
The audio amplifier in the NAV / COM radio is required for speaker and
transmitter operation. The amplifier is automatically selected, along with
the transmitter, by the transmitter selector switch. As an example, if the
number 1 transmitter is selected, the audio amplifier in the associated
NAV/ COMreceiver is also selected, and functions as the amplifier for ALL
speaker audio. In the event the audio amplifier in use fails, as evidenced by
loss of all speaker audio and transmitting capability of the selected
transmitter, select another transmitter. This should re-establish speaker
audio and transmitter operation. Since headset audio is not affected by
audio amplifier operation, the pilot should be aware that, while utilizing a
headset, the only indication of audio amplifier failure is loss of the selected
transmitter. This can be verified by switching to the speaker function.
AUTOMATIC AUDIO SELECTOR SWITCH
A toggle switch, labeled AUTO,can be used to automatically match the
1 October 1978 7-45