Cessna 172 - Radio Selector Switches; Transmitter Selector Switch

RADIO SELECTOR · · swtTCHES
RADIO SELECTOR SWITCH OPERATION.
..
Operation of the radio equipment is normal as covered in the respec,...
tive radio manuals. When more than one radfo is installed, an audio
switching system ·is
necessary. The operation of this switching system is
described be low. · · ·
TRANSMITTER SELECTOR SWITCH.
The transmitter selector switch, labeled TRANS, -has two· positions.
When two transmitters are installed, it is necessary to switch the· micro-
phone to the radio unit' the pilot desires to use for transmission. This is .
accomplished
by placing the transmitter selector switch in the position ·
corresponding to the
radio unit which is to be used. The up position
selects the upper
transmitter and the down position selects the lower
transmitter.
I RADIO SELECTOR SWITCHES I
--~~~~SPEAKER~~~~--
~
~
~
.. · ..
COM 1
M 2 DME
ADF
--~~~·1--PHONEs~~~~--
TRANSMITTER
SELECTOR SWITCH
SPEAKER-PHONE SWITCH (TYPICAL)
SWITCHES CONTROL SPEAKER-PHONE
FUNCTION OF COMMUNICATION AND
NAVIGATION EQUIPMENT IN RADIO
STACK ON INSTRUMENT PANEL.
Figure 7-1.