Manual Yaesu ATAS-120A (page 1 of 1) (English)

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ACTIVE TUNING ANTENNA SYSTEM

ATAS-120A

NSTALLATION/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

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

Inset the top whip element

through the hole in the wa-

terproof cap.

Insert the whip element into

the Antenna Coil assembly.

Slide the waterproof cap

down the element and on to

the Antenna Coil assembly.

Press the waterproof cap

snugly on top of the Antenna

Coil assembly, ensuring an

accurate fit to the contours of

the assembly.

Refer to the manufacturer’s

instructions, and install the mounting base assembly in a loca-

tion 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.

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 “Du-

plexer” (for the FT-857, FT-897 and FT-100/-100D) or

“Triplexer” (for the FT-847) device to connect to the appro-

priate 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 appropri-

ate 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.

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 ground-

ing purposes). Suitable mounts include the Diamond mod-

els TE5M and K400.



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.



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.



Do not install the

in a position where the

radiating element could come in contact with (A) any elec-

trical wiring, which could cause lethal shock, or (B) a

grounded metal surface, as this will disrupt communica-

tions 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 driv-

ing a vehicle.



Disconnect the

from the vehicle when wash-

ing 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 trans-

ceiver models.



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

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:

/14/21/28/50/144/430 MHz

Amateur Bands

EIGHT (Approx.): 1.4 ~ 1.6 meters (4.59 ~ 5.24 feet)

EIGHT (Approx.): 900 g (1.98 lbs.)

NPUT IMPEDANCE:50Ω

AX. INPUT POWER: 120 Watts (A3J)

ATCHED SWR: Less than 2.0:1

(with proper counterpoise)

(Specifications subject to change without notice or obligation)

Element

Insert element

through hole in

Waterproof cap

Waterproof Cap

(supplied)

Antenna coil

assembly

Tighten Allen screw

to secure element

Allen wrench

(supplied)

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

EAC81X701

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Yaesu ATAS-120A Manual

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