AIRPLANE
OPERATIONS
MANUAL
NAVIGATION AND
COMMUNICATION
MARCH 30, 2001
2-18-21
Page
5
Code
01
2 - Simplex
The user programs the same frequency for receive and for transmit.
The user also assigns one of the available operating modes (USB,
LSB, AM, TEL SUP CAR, or TEL PLT CAR) to the selected
channel. Simplex operation is used by ARINC, ATC (Air Traffic
Control), and others.
3 - Receive-only
The user programs a frequency for reception and assigns one of
the available operating modes (USB, LSB, AM, TEL SUP CAR, or
TEL PLT CAR), but does not program a transmit frequency.
The transmitter and power amplifier are locked out and cannot be
used when a channel has been programmed for receive-only
operation.
Receive-only channels are used to listen to frequency standards
(W W V) for example, time, weather, Omega status, and geophysical
alert broadcasts
HALF-DUPLEX CHANNEL PROGRAMMING PROCEDURE
1 - Access channelized operation.
Apply power to the system by rotating the volume (V) knob
clockwise from the OFF position. With power applied to the system,
ensure that the CHAN/FREQ switch is in the CHAN position.
2 - Select the desired user channel.
Rotate the left outer channel select knob in either direction until
user channel 1 or 40 appears at the right side of the CHAN display.
Then use the right outer channel select knob to select the desired
channel number (from 1 to 40) that you wish to program.
3 - Initiate program mode.
Press the program (PGM) button once to initiate the programming
sequence. At this point, the entire display on the CTL-230 will slowly
begin to blink.
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