Yaesu FT-991 Operating Manual page 144

i
nstallation of
A -t
ctive uning
Settings Before Operating the Tuner
1. Press the MENU(SETUP) button to enter the Menu
mode.
2. Rotate the MULTI knob to select the Menu item "143
TUNER SELECT".
3. Touch [ SELECT ] on the LCD, then rotate the
MULTI knob to set this Menu item to "ATAS". The
"ATAS" icon will appear in the display.
4. Touch [ ENTER ] on the LCD to save the new setting.
5. Press the MENU(SETUP) button or touch [ BACK ]
on the LCD to exit to normal operation.
Tuning Operation
The tuning of the ATAS-120A is carried out automati-
cally.
1. Press the TUNE button to begin automatic tuning.
The transmitter will be engaged, and the "ATAS"
icon will blink while tuning is in progress.
Press the TUNE button to stop the tuning in the middle
of the process.
n :
ote
r Check the grounding and installation conditions if
"HI-SWR" is flashing (tuning cannot be carried out).
r As transmit signals are emitted during tuning, take
note not to interfere with any communication that is
already in progress on the frequency.
Page 142
o
ptional
A S
ntennA ySteM
a
ccessories
( AtAS-120A ) o
MENU(SETUP) Button
MULTI Knob
Manual Tuning
Carry out the tuning of the ATAS-120A manually.
Press the PTT switch on the microphone to transmit and
then press the UP/DWN button on the microphone to
adjust the antenna until the meter indicates the minimum
SWR.
The meter on the screen will automatically change to a
SWR meter.
FT-991 O
perAtion
TUNE Button
M
peraTing anual