Ams Tx Mode; Rtty Shift Port; Standby Beep; Rtty Polarity-Rx - Yaesu FT-991 Operating Manual

092 AMS TX MODE

Function: Sets the operation of the AMS function.
Available Values: AUTO/MANUAL/DN/VW/ANALOG
Default Setting: AUTO
Description: When using the AMS (AUTO) function,
the transceiver selects one of the three transmission
modes automatically according to the received sig-
nal.
AUTO:
Selects one of the transmission modes automati-
cally according to the received signal.
MANUAL:
By briefly pressing the PTT switch, the operating
mode may be switched between digital and ana-
log mode.
DN:
Transmits in DN mode.
VW:
Transmits in VW mode.
ANALOG:
Transmits in FM mode (analog).

093 STANDBY BEEP

Function: Sets the Standby Beep function for digital
communications.
Available Values: OFF/ON
Default Setting: ON
Description: During a digital communication, an audible
beep sounds to indicate that the contact station has
completed a transmission (Standby Beep function).
094 RTTY LCUT FREQ
Function: Sets the low-frequency cutoff audio filter in
RTTY mode.
Available Values: OFF/100Hz - 1000Hz (50Hz/step)
Default Setting: 300Hz
Description: This is the low-frequency cutoff audio filter
in RTTY mode.
The cutoff frequency can be set at 50 Hz increments
between 100 Hz and 1000 Hz.
095 RTTY LCUT SLOPE
Function: Sets the slope of the low-frequency cutoff au-
dio filter in RTTY mode.
Available Values: 6dB/oct / 18dB/oct
Default Setting: 18dB/oct
Description: Selects the slope setting of the low-fre-
quency cutoff audio filter in RTTY mode.
096 RTTY HCUT FREQ
Function: Sets the high-frequency cutoff audio filter in
RTTY mode.
Available Values: OFF/700Hz - 4000Hz (50Hz/step)
Default Setting: 3000Hz
Description: This is the high-frequency cutoff audio fil-
ter in RTTY mode.
The cutoff frequency can be set at 50 Hz increments
between 700 Hz and 4000 Hz.
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097 RTTY HCUT SLOPE
Function: Sets the slope of the high-frequency cutoff au-
dio filter in RTTY mode.
Available Values: 6dB/oct / 18dB/oct
Default Setting: 18dB/oct
Description: Selects the slope setting of the high-fre-
quency cutoff audio filter in RTTY mode.

098 RTTY SHIFT PORT

Function: Sets the SHIFT input jack for RTTY mode.
Available Values: SHIFT/DTR/RTS
Default Setting: SHIFT
Description: Selects the SHIFT input jack for RTTY
mode.
SHIFT:
Inputs from the RTTY/DATA jack (pin 4) on the
rear panel.
DTR:
Controls the signal from the USB virtual COM/
DTR ports.
RTS:
Controls the signal from the USB virtual COM/
RTS ports.

099 RTTY POLARITY-RX

Function: Sets the shift direction for receiving in RTTY
mode.
Available Values: NOR/REV
Default Setting: NOR
Description: Sets the shift direction for receiving in
RTTY mode.
NOR:
The space frequency will be lower than the mark
frequency.
REV:
The mark frequency will be lower than the space
frequency.

100 RTTY POLARITY-TX

Function: Sets the shift direction for transmitting in
RTTY mode.
Available Values: NOR/REV
Default Setting: NOR
Description: Sets the shift direction for transmitting in
RTTY mode.
NOR:
The space frequency will be lower than the mark
frequency.
REV:
The mark frequency will be lower than the space
frequency.
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