Cessna TURBO CENTURION T210M 1978 Pilot Operating Handbook page 185

CESSNA
MODELT210M
SECTION 7
AIRPLANE
&
SYSTEMS DESCRIPTIONS
AUTOMATIC AUDIO SELECTOR SWITCH
A toggle switch, labeled AUTO, can be used to automatically match the
appropriate NA V / COM receiver audio to the transmitter being selected.
To utilize this automatic feature, leave all NA V / COM receiver switches in
the OFF ( center) position, and place the AUTO selector switch in either the
SPEAKER or PHONE position, as desired. Once the AUTO selector switch
is positioned, the pilot may then select any transmitter and its associated
NAV /COM receiver audio simultaneously with the transmitter selector
switch.
If
automatic audio selection is not desired, the AUTO selector
switch should be placed in the OFF (center) position.
NOTE
Cessna radios are equipped with sidetone capability (mon-
itoring of the operator's own voice transmission). Sidetone
will be heard on either the airplane 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 radio selector
switches.
AUDIO SELECTOR SWITCHES
The audio selector switches, labeled NA V / COM 1, 2 and 3 and ADF 1
and 2, allow the pilot to initially pre-tune all NA V / COM and ADF
receivers, and then individually select and listen to any receiver or
combination of receivers. To listen to a specific receiver, first check that
the AUTO selector switch is in the OFF (center) position, then place the
audio selector switch corresponding to that receiver in either the SPEAK-
ER (up) or PHONE (down) position. To turn off the audio of the selected
receiver, place that switch in the OFF ( center) position.
If
desired, the audio
selector switches can be positioned to permit the pilot to listen to one
receiver on a headset while the passengers listen to another receiver on the
airplane speaker.
The ADF 1 and 2 switches may be used anytime ADF audio is desired.
If
the pilot wants only ADF audio, for station identification or other reasons,
the AUTO selector switch (if in use) and all other audio selector switches
should be in the OFF position.
If
simultaneous ADF and NA V / COM audio
is acceptable to the pilot, no change in the existing switch positions is
required. Place the ADF 1 or 2 switch in either the SPEAKER or PHONE
position and adjust radio volume as desired.
NOTE
If the NAV/COM audio selector switch corresponding to
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