A
CTIVE
T
UNING
A
NTENNA
S
YSTEM
ATAS-120
I
NSTALLATION
/O
PERATING
I
NSTRUCTIONS
Thank you for choosing Yaesu’s exciting new
ATAS-120
Active Tuning Antenna System. We hope and trust that you will enjoy
many years of enjoyable mobile operation with the
ATAS-120
!
The
ATAS-120
is a unique mobile antenna designed for use with Yaesu the transceivers equipped for the ATAS system, such as the
FT-897, FT-847 and FT-100/-100D. The
ATAS-120
utilizes a motorized tuning system which resonates the radiating element for
lowest SWR without the need for expensive, inconvenient monoband resonating whip assemblies. The
ATAS-120
is designed to
mount directly onto a standard mobile antenna mount (not supplied) which is compatible with its Type “M” (“
m/m pitch only
”) base
connector. Your Dealer will be pleased to help you select the ideal mobile mounting assembly for your vehicle.
I
NSTALLATION
•
Refer to the drawing, and
secure the radiating ele-
ment to the top of the coil
assembly, using the sup-
plied Allen wrench.
‚
Refer to the manufacturer’s
instructions, and install the
mounting base assembly in
a location where a solid, se-
cure ground connection to
the car body can be ob-
tained.
Note:
Installation of the
ATAS-120
on a hatchback or trunk
lid may not permit a low SWR to be obtained. A solid bond to
the car body is important so as to establish a counterpoise for
the vertical radiating element.
ƒ
Connect the coaxial cable from the mounting base to the
transceiver’s HF antenna jack.
„
Refer to the transceiver’s operating manual, and set the
transceiver’s Menu selections associated with the ATAS
system.
For operation on the 144 and 430 MHz bands, in addition to
HF/50 MHz, you may wish to consider the purchase of a
“Diplexer” (for the FT-897 and FT-100/-100D) or “Triplexer”
(for the FT-847) device to connect to the appropriate
transceiver’s antenna jacks; the Diplexer or Triplexer will then
automatically pass RF power from the band in use while iso-
lating the other two antenna jacks. If you do not have a Diplexer
or Triplexer, the coaxial cable connector from the
ATAS-120
will have to be moved manually to the appropriate antenna
jack when you wish to operate on VHF or UHF.
O
PERATION
See the “Operation” section of the transceiver’s operating
manual for details of
ATAS-120
tuning and operation.
C
AUTIONS
m
For mounting onto s trunk lid or hatchback of a vehicle,
utilize a mount which provides secure, strong mechanical
contact to the vehicle's frame (to support the antenna's
cross-sectional area while driving, as well as for ground-
ing purposes). Suitable mounts include the Diamond mod-
els
TE5M
and
K400
.
m
In the interest of operator safety, always use the minimum
transmitter power necessary to establish and maintain com-
munications while operating mobile, and restrict trans-
mitter operation when pedestrians are within one meter
(3.3 feet) of the radiating element.
m
Do not allow anyone to touch the radiating element dur-
ing a transmitting session, due to the danger of burning of
the skin caused by the high RF voltage present.
m
Do not install the
ATAS-120
in a position where the radi-
ating element could come in contact with (A) any electri-
cal wiring, which could cause lethal shock, or (B) a
grounded metal surface, as this will disrupt communica-
tions and may cause arcing.
m
Do not touch the bellows of the
ATAS-120
, so as to avoid
undue stress to it or the mechanical components within it.
m
Do not attempt to perform the tuning process while driv-
ing a vehicle.
m
Disconnect the
ATAS-120
from the vehicle when wash-
ing your vehicle to prevent ingress of water into the
ATAS-
120
.
m
Because of the cross-sectional area of the
ATAS-120
,
simple magnetic mounts will not provide sufficient hold-
ing power to secure the
ATAS-120
reliably, and are not
recommended.
m
The
ATAS-120
is designed specifically for use with Yaesu
transceivers equipped for the “ATAS” system, and is not
capable of automatic operation with other transceiver mod-
els.
m
Note that the bellows may become slightly distorted dur-
ing the Auto-Tuning process; this does not affect opera-
tion of the antenna, however.
m
For base station operation, if you do not have a good coun-
terpoise system such as a townhouse balcony, VHF/UHF
performance can be enhanced by the installation of the
optional Yaesu
ATBK-100
Antenna Base Kit.
m
There are no user-serviceable parts inside this antenna.
Reckless turning of the top of the antenna coil may result
in breakage of the antenna coil wire and/or other internal
damage.
S
PECIFICATIONS
F
REQUENCY
R
ANGE
:
7/14/21/28/50/144/430 MHz
Amateur Bands
H
EIGHT
(Approx.):
1.4 ~ 1.6 meters (4.59 ~ 5.24 feet)
W
EIGHT
(Approx.):
900 g (1.98 lbs.)
I
NPUT
I
MPEDANCE
:
50
W
M
AX
. I
NPUT
P
OWER
: 120 Watts (A3J)
M
ATCHED
SWR
:
Less than 2.0:1
(with proper counterpoise)
(
Specifications subject to change without notice or obligation
)
Element
Antenna coil
assembly
Tighten Allen screw
to secure element
Insert element
into top of
coil assembly
Allen wrench
(supplied)
Setscrews
(supplied)
E
A
C
8
1
X
7
0
0
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD
US Headquarters
10900 Walker Street, Cypress, CA 90630, U.S.A.
International Division
8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, U.S.A.
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P.O. Box 75525, 1118 ZN Schiphol, The Netherlands
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
VERTEX STANDARD HK LTD.
Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,
Kwun Tong, Kowloon, Hong Kong
