Cessna 182S Pilot Operating Handbook page 245

SECTION 9 - SUPPLEMENTS
SUPPLEMENT 1 - FAA APPROVED
CESSNA
MODEL 182S
The Comm portion incorporates an automatic squelch. To
override the automatic squelch, the Comm volume control knob is
pulled out. Push the knob back in to reactivate the automatic
squelch. A "T" will be displayed during transmit and "R" during
valid signal reception.
The Nav portion uses the pull out feature of the Nav volume
control to receive the Nav signal Ident. Pull the volume control
knob out to hear the Ident signal plus voice. Push the knob in to
attenuate the Ident signal and still hear Nav voice.
All controls for the Nav/Comm, except those for navigation
course selection , are mounted on the front panel of the receiver-
transmitter. Control lighting is provided by NAV/COMM interior
lighting and the instrument panel flood lighting system. Operation
and description of the audio selector panel used in conjunction with
this radio is shown and described in Supplement 3 in this section.
NOTE
The unit has a stuck microphone alert feature. If the
microphone is keyed continuously for greater than
33 seconds, the transmitter stops transmitting and
the active Com" m frequency flashes to alert the pilot
of the stuck mic condition .
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