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FT-450 O
PERATION
M
ANUAL
I
NSTALLATION
OF
O
PTIONAL
A
CCESSORIES
A
CTIVE
-T
UNING
A
NTENNA
S
YSTEM
(
ATAS-100/-120/120A
)
O
PERATION
The optional
ATAS-100
,
ATAS-120
, or
ATAS-120A
Active-Tuning Antenna System permits operation on a num-
ber of HF bands (7/14/21/28 MHz) plus 50 MHz.
The
FT-450
provides microprocessor control of the tuning mechanism in the ATAS antenna for convenient
automatic tuning.
Interconnections to FT-450
“ATAS-120A” is connected referring to the figure below.
A
DVICE
:
Always turn off the power switch on the
FT-450
and the external power supply before you connect any cables.
A
TTENTION
:
Ì
Do not touch the cables or connectors with wet hands.
Ì
Do not touch the cables or connectors when you transmit. There is danger of electric shock or other serious
injury.
Ì
It is not possible to use an
ATU-450
or the
FC-30
with an
ATAS-120A
at the same time.
Installation
Before operation can begin, you must instruct the
FT-450
’s microprocessor that the ATAS-100/-120/-120A is
being used. This is done using the Menu Mode:
1. Press and hold the [
F
] button for one second to
enter the Menu Mode.
The “
” icon will appear in the display.
2. Rotate the [
DSP/SEL
] knob to select the Menu
Item “
TUNER
”.
3. Press the [
DSP/SEL
] knob to enable this selected
Menu Item.
4. Rotate the [
DSP/SEL
] knob to change the setting
to “
ATAS
”.
5. Press and hold the [
F
] button for one second to
return to normal operation.
Operation
A
UTOMATIC
T
UNING
1. Press the [
TUNE
] button briefly to activate the
Automatic Antenna Tuner.
The “
” icon will appear in the display.
If the transceiver frequency is out of the amateur
band, the “
” icon will not appear.
If the antenna SWR is High (more than 1:2.0), the
“
” icon will blink.
2. Press and hold the [
TUNE
] button for one second
to begin automatic tuning. The transmitter will be
engaged, and the “
” icon will blink while tun-
ing is in progress.
3. Tuning will stop automatically when a low SWR is
achieved. You may Press and hold the [
TUNE
]
button for one second while tuning is in progress,
to cancel the automatic tuning.
[
DSP/SEL
] Knob
[
F
] button
[
TUNE
] button
