Cessna T182 1982 Pilot Operating Handbook page 215

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PILOT'S OPERATING HANDBOOK
AUDIO CONTROL PANELS
SUPPLEMENT
SIDETONE OPERATION
Cessna radios are equipped with sidetone capability (monitoring of
the operator's own voice transmission). While adjusting speaker sidetone,
be aware that if the sidetone volume level is set too high, audio feedback
(squeal) may result when transmitting.
When the airplane has one or two transmitters, sidetone is provided in
either the speaker or headset anytime the COM AUTO selector switch is
utilized. Placing the COM AUTO selector switch in the OFF position will
eliminate sidetone. Sidetone internal adjustments are available to the pilot
through the front of the audio control panel (see figure 1).
When the airplane has three transmitters, sidetone will be heard on
either the speaker or a headset as selected with the AUTO selector switch.
Sidetone may be eliminated by placing the AUTO selector switch in the
OFF position, and utilizing the individual audio selector switches. Adjust­
ment of speaker and headset sidetone volume can only be accomplished by
adjusting the sidetone potentiometers located inside the audio control
panel.
NOTE
Sidetone is not available on HF Transceiver (Type ASB­
125), when installed.
OPTIONAL INTERCOM SYSTEM
The optional intercom system is a pilot and copilot intercom phone
system which is only offered with the one and two transmitter type audio
control panel. The system incorporates its own audio amplifier with a
volume control (labeled INT) and a "hot mike" feature. The intercom
system is used with the headphones only.
The "hot mike" feature allows the pilot and copilot to communicate at
anytime through their microphone/headsets without having to key the
mike. However, they must key the mike button on their control wheel to
transmit over the aircraft's transceiver. Sidetone is present on the inter­
com system when the COM AUTO switch is in the PHONE position.
NOTE
Any ambient noise attenuating type padded headset and
boom mike combination may not be compatible with this
system.
21 August 1981
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