Yaesu FT-991A, Руководство по эксплуатации

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Page 41 FT- 991 Operating Manual
Convenience Features
AMS
(
Automatic Mode Select
)
Operation
Setting the Operation of the AMS Function
Using the AMS function switches the communication mode to match the received signal but you can alternatively
select and lock the transmission mode.
Toggling to the Digital Communication Mode
Without using the AMS function, you can select and lock the digital communication mode (DN or VW).
1. Press the MENU(SETUP) button to enter the
Menu mode.
2. Rotate the MULTI knob to select Menu item “
090
AMS TX MODE
”.
3. Touch [ SELECT ] on the LCD, rotate the MULTI
knob to select the desired operation (see the fol-
lowing table).
MULTI Knob
MENU(SETUP) Button
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1. Touch [ AMS ] on the screen to set the AMS func-
tion to “OFF”.
2. Touching [ DIGITAL ] on the screen switches the
digital communication mode between the follow-
ing modes.
DN (V/D Mode) : As the audio signal error is de-
tected and repaired at the same time as the
transmission of the digital audio signal,
it becomes more difficult for conversa-
tions to be cut off. A basic digital mode of
C4FM FDMA.
4. Touch [ ENTER
] on the LCD to save the new set-
ting.
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5. Press the MENU(SETUP) button or touch
[
BACK
] on the LCD to exit to normal operation.
Available
Settings
Explanation of Function
AUTO TX/RX The operating mode is automatically selected from the three communication modes to match the received signal.
MANUAL TX/RX The operating mode is automatically selected from three communication modes to match the received signal.
Pressing the Microphone
PTT
switch momentarily, toggles between the Digital (C4FM) and Analog (FM)
communication modes.
DN RX The RX mode is automatically selected from the three communication modes to match the received signal.
TX The TX mode is automatically changed to the “DN” mode.
VW RX The RX mode is automatically selected from the three communication modes to match the received signal.
TX The TX mode is automatically changed to the “VW” mode.
ANALOG RX The RX mode is automatically selected from the three communication modes to match the received signal.
TX The TX mode is automatically changed to the “FM” mode.
VW (FR Mode) : Digital voice data is transmit-
ted using the entire 12.5 kHz bandwidth.
High quality voice communication is pos-
sible.