AIRPLANE
OPERATIONS
MANUAL
NAVIGATION AND
COMMUNICATION
MARCH 30, 2001
2-18-21
Page
3
Code
01
HF NORMAL OPERATION
There are two types of operation:
- Discrete frequency tuning.
- Programmable channel.
DISCRETE FREQUENCY TUNING OPERATION
In the discrete frequency mode of operation, the user may directly tune
any one of 280,000 frequencies over the range of 2.0 to 29.9999 MHz.
1 - Access discrete frequency 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 FREQ position.
This can be confirmed by noting that four dashes appear in the
CHAN display.
2 - Enter the frequency.
Use the four frequency select knobs to enter the desired frequency
in the FREQ kHz display.
3 - Select the transmission mode.
Pull out and rotate the left inner (PULL MODE) knob in either
direction, to assign one of the available operating modes (USB,
LSB, AM, TEL SUP CAR, or TEL PLT CAR).
4 - Tune the antenna.
Momentarily key the PTT to initiate the antenna coupler tuning
cycle. A steady 1000-Hz tone will be heard in the headset or
speaker while the antenna coupler is been tuned. Approximately 1
second after antenna coupler tuning cycle is completed (tuning
cycle may require from 5 to 30 seconds), the 1000-Hz tone will
cease, indicating that the system is ready for use on the selected
frequency. Adjust volume (V) and squelch (S) controls as desired.
NOTE: - The discrete frequency mode always provides simplex
operation (transmit and receive frequencies are the same).
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