Page 87
FT-450 O
PERATION
M
ANUAL
I
NSTALLATION
OF
O
PTIONAL
A
CCESSORIES
A
UTOMATIC
A
NTENNA
T
UNER
ATU-450 O
PERATION
The
ATU-450
Automatic Antenna Tuner responds to control commands from the
FT-450
Transceiver, providing
microprocessor-based impedance matching on the 160 through 6 meter amateur bands. The impedance matching
range is from 16.5 ohms to 150 ohms (up to 3:1 SWR). Accordingly, the
ATU-450
should not be expected to
match “Long wire” type antennas unless you have taken specific design steps to ensure that the impedance
presented to the
FT-450
is within this specification.
Important Note
Ì
Please be careful to avoid any short-circuit to any metal object.
Ì
Please install with great care to prevent injuries from sharp corners of metal objects.
Ì
Please practice standard grounding techniques and do not touch semiconductor components unnecessarily
to avoid breakage or damage by static electricity etc.
Cable Information
Connect the interconnecting Control Cable from the
FT-450
.
Connect the TMP plug (marked green) from the
ATU-450
to J5402 on the MAIN Unit.
Connect the other TMP plug (marked gray) from the
ATU-450
to J5404 on the MAIN Unit.
Installation
1. Turn off the
FT-450
’s POWER switch by pressing
and holding the [
POWER
(
ON/OFF
)] switch for one
second, and then turn off the External DC Power
Supply’s POWER switch.
2. Disconnect the power cable from the ~DC IN Jack
on the rear panel, and then disconnect all cables
from the
FT-450
.
3. Remove the two screws from each side and four
screws from the top case of the transceiver. Slide
the top case upward about 1 inch, then discon-
nect the speaker plug from the MAIN Unit and
remove the top case.
N
OTE
:
Because the speaker cable is connected to the
top case, please be careful not to break the
speaker cable.
4. Remove the two screws from each side and four
screws from the bottom case of the transceiver
and then remove the bottom case.
5. The
ATU-450
mounting location is on the right side
of the bottom chassis. Insert the two coaxial cables
from the
ATU-450
into this hole.
6. Connect the 6-pin plug from the
ATU-450
to the
6-pin Jack.
7. Install the
ATU-450
to the chassis while pulling
the two coaxial cables thru the chassis.
Through Hole
6-pin Connector
8. Mount the
ATU-450
with the supplied four screws.
N
OTE
:
At the front side of the
ATU-450
, carefully lift the
rubber packing, which is around the transceiver
front panel, and install the two front screws. Do
not damage the packing or the top case may not
close.
Rubber Packing
ATU-450
