24
Fixing the Communication Mode
To fix the transmission mode for operation, touch [
MODE
]
to switch the communication mode.
Communication Mode
Icon
Description of Modes
V/D Mode
(
Voice/Data simultaneous transmission mode)
This is the standard digital mode.
Calls are less prone to interruptions caused by detec-
tion and correction of the received digital voice signal.
Voice FR Mode*
1
(Voice Full Rate Mode)
*
1
High speed data communication using entire 12.5 kHz
band.
Enables high-quality voice communication.
FM Mode
Analog communication using FM mode.
AM Mode (receive only)*
2
The AM mode for receive only.
Data FR Mode
(High speed data Communication Mode)
High speed data communication mode using the entire
12.5 kHz bandwidth for data communication. Automati-
cally switches to this mode during image transmission.
*
1 When the Setup Menu [
TX/RX
]
[
2 DIGITAL
]
[
4 DIGITAL VW
] is set to “
ON
”
(factory default is “OFF”), the Voice FR mode (VW) may be selected.
*2 When the Setup Menu [
TX/RX
]
[
1 MODE
]
[
3 RX MODE
] is set to “
AUTO
”
(factory default setting), AM mode is automatically selected within the AIR band (108
- 136.995 MHz).
Transmission
1. While pressing and holding the
PTT
switch, speak
into the microphone.
The TX/BUSY indicator will glow red during transmis-
sion.
If the PTT switch is pressed when a frequency other than
the amateur ham radio band is selected, an alarm tone
(beep) will be emitted and “TX INHIBIT” appears on the
LCD, disabling transmission.
2. Release the
PTT
switch to return to receive mode.
When receiving a signal, the TX/BUSY Indicator
lights according to the receive mode.
Receive Band
TX/BUSY LED
C4FM receiving
Blue
Analog FM receiving
Green
TX/BUSY LED
The TX / BUSY LED blinks while receiving a signal that does not match the DG-ID or
similar tones, and when the sub-band audio is muted with the sub-band mute feature.
If transmission is continued for a long period, the transceiver overheats and the high
temperature protection function is activated. As a result, the transmitting power level is
automatically set to Low Power. If transmission continues while the high temperature
protection function is active, the transceiver will be forcibly returned to the receive mode.
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