Yaesu FT-991A Operating Manual page 24

Front Panel Controls & Switches
A=B Button
Pressing this button momentarily, sets the same fre-
quency and data values of VFO-A to VFO-B.
A/B Button
Pressing this button momentarily, exchanges the
frequency and memory channel data, of VFO-A and
VFO-B.
RCL/STO Button
Press and hold this button for more than one second
to write the frequency and data currently set for
VFO-A onto the quick memory bank ( QMB ) ( see
page 103 ) .
m 5 channels are available for QMB memories.
Press the button briefly to recall the data written onto
the quick memory banks ( QMB ) one by one.
TUNE Button
This is the on/off switch for the FT-991A Automatic
Antenna Tuner.
m Press the [ TUNE ] button briefly to display the
"TUNER" indicator on the touch panel and acti-
vate the antenna tuner.
Press the [ TUNE ] button briefly again to turn the
"TUNER" indicator off and disable the antenna
tuner.
m Press the [ TUNE ] button for about 1 second to
start "automatic tuning". The "TUNER" indica-
tor will flash.
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Note:
 Since the transceiver transmits automatically dur-
ing automatic tuning, make sure to connect an
antenna or dummy load before tuning up.
 When the antenna or dummy load does not match
the impedance, "HI-SWR" will appear on the
touch panel.
C.S Button
Press this button momentarily to directly recall a fa-
vorite Menu Selection.
m To program a Menu selection to the C.S button,
press the MENU ( SETUP ) button to enter the
Menu. Select the Menu item you want to set as
the short cut. Press the C.S button, then press the
MENU ( SETUP ) button; this will lock in the se-
lected Menu item as the short cut.
TXW Button
During a split operation, press and hold the TWX
button to listen on the transmitter frequency while
holding the button.
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