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Basic Operations
Receiving
When operating in a fixed communication mode, switch to the communication mode using
.
The communication mode will switch in sequence as follows each time is pressed.
“
▀
○○ (AMS)” → “DN (V/D mode)” → “VW/DW (FR mode)” → “FM (Analog)”
Operating mode
Display
Explanation of modes
AMS
(Automatic Mode Select)
▀
○○
The operating mode is automatically selected from four communication
modes to match the signal received.
(The ○○ part display differs according to the signal received)
The AMS feature settings may be changed via Set-up Menu ( P.174).
V/D mode
(simultaneous voice and data
communication mode)
DN
As the audio signal error is detected and repaired at the same time as
the transmission of the digital audio signal, it becomes more difficult
for conversations to be cut off. A basic digital mode of C4FM FDMA.
Voice FR mode
(Voice full-rate mode)
VW
Digital voice data is transmitted using the entire 12.5 kHz bandwidth.
High quality voice communication is possible.
Data FR mode
(high speed data
communication mode)
DW
High speed data communication mode using the entire 12.5 kHz
bandwidth for data communication.
Automatically switches to this mode for video communication.
Analog FM mode
FM
Analog communication mode using the FM mode.
This mode is effective for communication when the signal strength is
so weak that the voice is cut off midway in the digital mode.
Caution
In the V/D mode (“DN” displayed), the position information is included in the transmitted signal during
the conversation, but in the Voice FR mode (“VW” displayed), the position information is not included.
Switching the modulation mode
The modulation mode can be selected from “FM”, “NARROW FM” and “AM” in the analog
mode.
When shipped from the factory, the mode is set to “AUTO” where the most optimal
modulation mode is automatically selected according to the frequency.
1
Choose the operating band
2
Press for one second or longer
The set-up menu will be displayed.
