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to the transmitter the pilot has selected for use.
terlocking transmitter selector switches labeled "TR 1" and "TR 2" are
prOVided.
"TR 1" selects the upper transmitter and "TR 2" selects the
lower transmitter.
The installa tion of Cessna radio equipment provides certain audio
back-up capabilities and transmitter selector switch functions that the
pilot should be familiar with.
labeled "TR 1" or "TR 2" is depressed, the audio amplifier of the corres
ponding tran sceiver is utilized to provide the speaker audio for all radios.
If
the audio amplifier in the selected transceiver fails, as evidenced by
loss of speaker audio for all radios, depress the transmitter selector
switch for the transceiver not in use.
utilized for headphones, a malfunctioning amplifier will not affect head
phone operation.
SPEAKER-PHONE SWITCHES.
The speaker-phone switches such as "COM 1", "NAV 1"
radios), or "REC 1", "REC 2"
output of the receiver in use is fed to the headphones or through the audio
amplifier to the speaker.
obtain speaker operation, or release it if headphone operation is desired.
AUTOPILOT·OMNI SWITCH.
When a Nav-O-Matic autopilot is installed with two compatible omni
receivers, two autopilot-omni switches labeled "AP 1" and "AP 2" are
utilized.
These switches select the omni receiver to be used for the omni
course sens ing function of the autopilot.
ing the selector s witch corresponding to the receiver which is to be used.
A microphone-headset combination is offered as optional equipment.
USing the microphone-headset and a micro phone keying switch on the left
side of the pilot's control wheel, the pliot can conduct radio communica
tions without interrupting other control operations to handle a hand-held
microphone.
Also, passengers need not listen to all communications.
The microphone and headset jacks are located near the lower left corner
of the instrument panel.
When the transmitter selector switch
(300
Depress the switch for the desired receiver to
MICROPHONE-HEADSET
To accomplish this, in
Since an audio amplifier is not
series radios) determine whether the
This is accomplished by depress
(400
series
7-5
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