Page 76
FT-
991
Operating Manual
Transmitter Convenience Features
Split-Frequency Operation
A powerful capability of the
FT-991A
is its flexibility in Split Frequency operation using the VFO-A and VFO-B fre
-
quency registers. This makes the
FT-991A
especially useful for high-level DX-peditions. The Split operation capability
is very advanced and easy to use.
1. Rotate the Main Tuning Dial knob to set the desired
RX frequency.
2. Press the
A/B
button, then rotate the Main Tuning
Dial knob to set the desired split TX frequency.
3. Press the
A/B
button, then press the
SPLIT
button.
The VFO-B frequency will be shown in the TFT dis-
play and the LED indicators will appear as below:
VFO-A
RX
Indicator: “ON” (LED glows Green)
VFO-A TX
Indicator: “OFF” (
LED Off
)
VFO-B RX
Indicator: “OFF” (
LED Off
)
VFO-B TX
Indicator: “ON” (LED glows Red)
SPLIT Button
TXW Button
A/B Button
During Split operation, the VFO-A register will be used
for reception, while the VFO-B register will be used for
transmission. If you press the
SPLIT
button once more,
Split operation will be cancelled.
Advice:
During Split operation, pressing the
A/ B
button will
reverse the contents of VFO-A and VFO-B. Press the
A/B
button once more to return to the original fre-
quency alignment.
During Split operation you may listen to the TX fre-
quency temporarily while pressing the
TXW
button
located on the bottom left of the Main Tuning Dial
knob.
While pressing the
TXW
button during split opera-
tions, the frequency of transmit on VFO-B can be
changed.
During Split operation it is also possible to set VFO-
A and VFO-B to different Amateur bands if a multi
band antenna is used.
Quick Split Operation
The Quick Split feature allows setting a one-touch offset
of +5 kHz compared to the VFO-A frequency, to be ap
-
plied to the transceiver VFO-B (transmit) frequency,
1. Start with regular transceiver operation on the VFO-A.
VFO-A RX
Indicator: “ON” (LED glows Green)
VFO-A TX
Indicator: “ON” (LED glows Red)
VFO-B RX
Indicator: “OFF” (
LED Off
)
VFO-B TX
Indicator: “OFF” (
LED Off
)
2. Press and hold in the
SPLIT
button for one second
to engage the Quick Split feature, and apply a fre-
quency 5 kHz above the VFO-A frequency to the
VFO-B frequency register.
The VFO configuration will then be:
VFO-A RX
Indicator: “ON” (LED glows Green)
VFO-A TX
Indicator: “OFF” (
LED Off
)
VFO-B RX
Indicator: “OFF” (
LED Off
)
VFO-B TX
Indicator: “ON” (LED glows Red)
3. Press and hold in the
SPLIT
switch for one second
to increment the Sub (VFO-B)
offset frequency an
-
other +5 kHz.
Quick Points:
The offset of VFO-B from VFO-A is programmed
via the Menu and is set to +5 kHz at the factory.
However, other offsets may be selected using the fol
-
lowing procedure:
1. Press the
MENU(SETUP)
button to engage the
Menu mode.
2. Rotate the
MULTI
knob to select Menu item “
035
QUICK SPLIT FREQ
”.
3. Touch [
SELECT
] on the LCD, then rotate the
MULT
knob to select the desired offset. The avail
-
able setting range is –20kHz - +20kHz
(factory de-
fault: +5 kHz
).
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