ACTIVE TUNING ANTENNA SYSTEM
ATAS-120A
INSTALLATION/OPERATING INSTRUCTIONS
The 
is a unique mobile antenna designed for use with Yaesu the transceivers equipped for the ATAS system, such as the FT-897, FT-847, FT-857 and FT-100/-100D. The 
utilizes a motorized tuning system which resonates the radiating element for lowest SWR without the need for expensive, inconvenient monoband resonating whip assemblies. The 
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.
Thank you for choosing exciting new 
Active Tuning Antenna System. We hope and trust that you will enjoy many years of enjoyable mobile operation with the 
!
INSTALLATION
c Inset the top whip element through the hole in the waterproof cap.
d Insert the whip element into
the Antenna Coil assembly. e Slide the waterproof cap
down the element and on to the Antenna Coil assembly.
f Press the waterproof cap snugly on top of theAntenna Coil assembly, ensuring an accurate fit to the contours of
the assembly.
g Refer to the manufacturer’s
instructions, and install the mounting base assembly in a location where a solid, secure ground connection to the car body
can be obtained. |
|
Note: Installation of the |
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.
h Connect the coaxial cable from the mounting base to the transceiver’s HF antenna jack.
iRefer 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 “Duplexer” (for the FT-857, FT-897 and FT-100/-100D) or “Triplexer” (for the FT-847) device to connect to the appropriate transceiver’s antenna jacks; the Duplexer or Triplexer will then automatically pass RF power from the band in use while isolating the other two antenna jacks. If you do not have a Diplexer or Triplexer, the coaxial cable connector from the
will have to be moved manually to the appropriate antenna jack when you wish to operate on VHF or UHF.
OPERATION
See the “Operation” section of the transceiver’s operating manual for details of 
tuning and operation.
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.
YAESU EUROPE B.V.
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
VERTEX STANDARD (AUSTRALIA) PTY., LTD.
Normanby Business Park, Unit 14/45 Normanby Road Notting Hill 3168, Victoria, Australia
E A C 8 1 X 7 0 1
CAUTIONS
For mounting onto a 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 grounding purposes). Suitable mounts include the Diamond models TE5M and K400.
In the interest of operator safety, always use the minimum transmitter power necessary to establish and maintain communications while operating mobile, and restrict transmitter operation when pedestrians are within one meter (3.3 feet) of the radiating element.
Do not allow anyone to touch the radiating element during a transmitting session, due to the danger of burning of the skin caused by the high RF voltage present.
Do not install the 
in a position where the radiating element could come in contact with (A) any electrical wiring, which could cause lethal shock, or (B) a grounded metal surface, as this will disrupt communications and may cause arcing.
Do not touch the Antenna Coil Assembly of the 
, so as to avoid undue stress to it or the mechanical components within it.
Do not attempt to perform the tuning process while driving a vehicle.
Disconnect the 
from the vehicle when washing your vehicle to prevent ingress of water into the 
due to the high water pressure, or damage from the brushes.
Because of the cross-sectional area of the 
, simple magnetic mounts will not provide sufficient hold-
ing power to secure the 
reliably, and are not recommended.
The 
is designed specifically for use with Yaesu transceivers equipped for the “ATAS” system, and is not capable of automatic operation with other transceiver models.
For base station operation, if you do not have a good counterpoise system such as a townhouse balcony, VHF/UHF performance can be enhanced by the installation of the optional 
Antenna Base Kit.
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.
SPECIFICATIONS
FREQUENCY RANGE: |
7/14/21/28/50/144/430 MHz |
HEIGHT (Approx.): |
Amateur Bands |
1.4 ~ 1.6 meters (4.59 ~ 5.24 feet) |
|
WEIGHT (Approx.): |
900 g (1.98 lbs.) |
INPUT IMPEDANCE: |
50Ω |
MAX. INPUT POWER: |
120 Watts (A3J) |
MATCHED SWR: |
Less than 2.0:1 |
|
(with proper counterpoise) |
(Specifications subject to change without notice or obligation)
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