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Page 128 FT-
991
OperaTing Manual
Menu MODe
039 REF FREQ ADJ
Function: Adjusts the reference oscillator.
Available Values: −25 - 0 - 25
Default Setting: 0
Description: The frequency may be calibrated when
connecting a frequency counter to the
transceiver, or when receiving a standard
frequency such as WWV or WWVH.
040 CLAR MODE SELECT
Function: Selects the clarier operation.
Available Values: RX/TX/TRX
Default Setting: RX
Description: Selects the clarifier operation when the
CLAR
button is pressed.
RX: Functions as the RX clarier which changes
only the receiver frequency without chang-
ing transmit frequency.
TX: Functions as the TX clarier which changes
only the transmit frequency without chang-
ing the receiver frequency.
TRX: Functions as the TRX clarifier which
changes the transmit frequency and the re-
ceiver frequency simultaneously.
041 AM LCUT FREQ
Function: Sets the low-frequency cutoff audio filter in
AM mode.
Available Values: OFF/100Hz - 1000Hz
(
50Hz/step
)
Default Setting: OFF
Description: This is the low-frequency cutoff audio lter
in AM mode.
The cutoff frequency can be set at 50 Hz
increments between 100 Hz and 1000 Hz.
042 AM LCUT SLOPE
Function: Sets the slope of the low-frequency cutoff au-
dio lter in AM mode.
Available Values: 6dB/oct / 18dB/oct
Default Setting: 6dB/oct
Description: Selects the slope of the low-frequency cut-
off audio lter in AM mode.
043 AM HCUT FREQ
Function: Sets the high-frequency cutoff audio lter in
AM mode.
Available Values: OFF/700Hz - 4000Hz
(
50Hz/step
)
Default Setting: OFF
Description: This is the high-frequency cutoff audio l-
ter in AM mode.
The cutoff frequency can be set at 50 Hz
increments between 700 Hz and 4000 Hz.
044 AM HCUT SLOPE
Function: Sets the slope of the high-frequency cutoff au-
dio lter in AM mode.
Available Values: 6dB/oct / 18dB/oct
Default Setting: 6dB/oct
Description: Selects the slope of the high-frequency cut-
off audio lter in AM mode.
045 AM MIC SELECT
Function: Selects the microphone input jack for AM
mode.
Available Values: MIC/REAR
Default Setting: MIC
Description: Selects the microphone input jack to be
used in AM mode.
FRONT: Audio is input from the
MIC
jack on the
front panel.
DATA: Disables the microphone circuit on the
front panel and inputs audio/data from
the
USB
jack or
RTTY/DATA
jack on
the rear panel.
046 AM OUT LEVEL
Function: Sets the level of the receive AM signal output
from the
RTTY/DATA
jack.
Available Values: 0 - 100
Default Setting: 50
047 AM PTT SELECT
Function: Sets the PTT control for the AM transmit sig-
nal.
Available Values: DAKY/RTS/DTR
Default Setting: DAKY
Description: Selects the PTT control method for the AM
transmit.
DAKY: Controls the AM transmit signal from
the
RTTY/DATA
jack
(
pin 3
)
on the rear
panel.
DTR: Controls the AM transmit signal from the
USB virtual COM/DTR ports.
RTS: Controls the AM transmit signal from the
USB virtual COM/RTS ports.
048 AM PORT SELECT
Function: Selects the input jack of the AM signal.
Available Values: DATA/USB
Default Setting: DATA
Description: Selects the input jack of the AM signal
when
045 AM MIC SELECT
is set to
DATA
”.
DATA: Inputs from the
RTTY/DATA
jack on the
rear panel.
USB: Inputs from the
USB
jack on the rear panel.
049 AM DATA GAIN
Function: Sets the level of the AM signal input when
045 AM MIC SELECT
” is set to “
DATA
”.
Available Values: 0 - 100
Default Setting: 50
130


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