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17FT-70DR/FT-70DE Operating Manual
Fixing the Communication Mode
1. To fix the transmit operation mode, press and
hold the
[
AMS
]
key to turn the AMS function OFF.
The “AMS” icon turns off.
2. Press the
[
MODE
]
key to change the commui-
cation mode.
Current 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 detection 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.
*1 When the Set Mode
[
16 DIG VW
]
(
36
)
is set to “ON
(
factory default is “OFF
)
, the Voice FR mode
(
VW
)
may be selected.
*2 When the Set Mode
[
47 RX MOD
]
(
37
)
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 MODE/STATUS Indicator lights during the
transmission.
Transmission mode
Left
portion
Right
portion
Analog FM
Red
Red
Digital C4FM mode Blue
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 “ERROR
appears on the LCD, disabling transmission.
2. Release the PTT switch to return to receive mode.
When receiving a signal, the MODE/STATUS
Indicator lights according to the receive mode.
Microphone
Mode/Status indicator
Receive mode
Left
portion
Right
portion
Analog FM
Green
Green
Digital C4FM mode Blue
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.
19


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