Split Operation Using The Tx Clarifier - Yaesu FT-991A Operating Manual

Transmitter Convenience Features

Split Operation Using the TX Clarifier

For split TX/RX operation in "casual" pile-ups, where the split is less than 10 kHz, the TX Clarifier ( Offset Tuning ) fea-
ture may be utilized.
1. Press the MENU ( SETUP ) button to enter the Menu
mode.
2. Rotate the MULTI knob to select Menu item "040
CLAR MODE SELECT".
3. Touch [ SELECT] on the LCD, then rotate the
MULTI knob to set this Menu item to "TX" ( the de-
fault setting is "RX" ) .
4. Touch [ ENTER ] on the LCD to save the new set-
ting.
5. Press the MENU ( SETUP ) button or touch [ BACK ]
on the LCD to exit to normal operation.
6. Press the CLAR button. The "TX" icon will appear
in the TFT display.
Quick Point:
The Clarifier is frequently used for receiver offset
tuning. However, for DX pile-ups where the DX
station is using a split of less than 10 kHz, the TX
Clarifier function is usually the quickest way to set
the transmitter to the desired offset frequency.
FT- 991 Operating Manual
MENU ( SETUP ) Button
MULTI Knob
7. Rotate the CLAR/VFO-B knob to set the desired
transmitter offset. A maximum split of ±9.999 kHz
may be set.
8. To exit from TX Clarifier operation, press the CLAR
button once more. The "TX" icon will disappear
from the display.
Advice:
 When listening to a "pile-up" calling a DX station, in
order to find the station currently being worked, you
may press the CLAR button. Then, use the CLAR/
VFO-B knob to zero in on the station calling the DX
( use the SPOT function on CW for precise alignment
of your frequency ) . You may then press the CLAR
button again to cancel the RX Clarifier, and return to
reception on the DX station's frequency.
 Just as with receiver Clarifier operation, the amount
of offset from the original VFO frequency will ap-
pear in the display.
 As with receiver Clarifier operation, when you turn
the TX Clarifier off, the last-used offset is remem-
bered, and will be available if you turn the TX Clari-
fier back on. To clear the Clarifier offset, press and
hold the CLAR button for more than 1 second.
Quick Point:
When attempting to work a DX station on CW in a split
frequency pile-up, remember that a large number of
other stations may also be using Yaesu transceivers with
capability similar to that of your FT-991A. On the DX
side of the pile-up, everyone calling precisely on the
same CW frequency will sound like a single tone! So
you may have more success if you use the RX Clarifier
to find a hole in the pile-up, instead of trying to zero-
beat the last station worked by the DX station.
CLAR/VFO-B Knob
CLAR Button
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