Atas 120
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The document provides installation and operating instructions for the Yaesu ATAS-120 Active Tuning Antenna System. The ATAS-120 is a motorized mobile antenna that resonates without the need for expensive resonating whips. It mounts to standard mounts and connects to compatible Yaesu transceivers. The instructions cover installation, operation, and safety cautions such as ensuring a solid ground connection and not touching the radiating element while transmitting.
Atas 120
- 1. ACTIVE TUNING ANTENNA SYSTEM ATAS-120 INSTALLATION/OPERATING INSTRUCTIONS Thank you for choosing Yaesus 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. INSTALLATION CAUTIONS Refer to the drawing, and Element m For mounting onto s trunk lid or hatchback of a vehicle, secure the radiating ele- Insert element utilize a mount which provides secure, strong mechanical into top of ment to the top of the coil coil assembly contact to the vehicle's frame (to support the antenna's assembly, using the sup- cross-sectional area while driving, as well as for ground- plied Allen wrench. Setscrews ing purposes). Suitable mounts include the Diamond mod- Refer to the manufacturers (supplied) els TE5M and K400. instructions, and install the m In the interest of operator safety, always use the minimum mounting base assembly in Allen wrench transmitter power necessary to establish and maintain com- a location where a solid, se- (supplied) munications while operating mobile, and restrict trans- Antenna coil cure ground connection to assembly Tighten Allen screw mitter operation when pedestrians are within one meter the car body can be ob- to secure element (3.3 feet) of the radiating element. tained. m Do not allow anyone to touch the radiating element dur- Note: Installation of the ATAS-120 on a hatchback or trunk ing a transmitting session, due to the danger of burning of lid may not permit a low SWR to be obtained. A solid bond to the skin caused by the high RF voltage present. the car body is important so as to establish a counterpoise for m Do not install the ATAS-120 in a position where the radi- the vertical radiating element. ating element could come in contact with (A) any electri- Connect the coaxial cable from the mounting base to the cal wiring, which could cause lethal shock, or (B) a transceivers HF antenna jack. grounded metal surface, as this will disrupt communica- Refer to the transceivers operating manual, and set the tions and may cause arcing. transceivers Menu selections associated with the ATAS m Do not touch the bellows of the ATAS-120, so as to avoid system. undue stress to it or the mechanical components within it. For operation on the 144 and 430 MHz bands, in addition to m Do not attempt to perform the tuning process while driv- HF/50 MHz, you may wish to consider the purchase of a ing a vehicle. Diplexer (for the FT-897 and FT-100/-100D) or Triplexer m Disconnect the ATAS-120 from the vehicle when wash- (for the FT-847) device to connect to the appropriate ing your vehicle to prevent ingress of water into the ATAS- transceivers antenna jacks; the Diplexer or Triplexer will then 120. automatically pass RF power from the band in use while iso- m Because of the cross-sectional area of the ATAS-120, lating the other two antenna jacks. If you do not have a Diplexer simple magnetic mounts will not provide sufficient hold- or Triplexer, the coaxial cable connector from the ATAS-120 ing power to secure the ATAS-120 reliably, and are not will have to be moved manually to the appropriate antenna recommended. jack when you wish to operate on VHF or UHF. m The ATAS-120 is designed specifically for use with Yaesu transceivers equipped for the ATAS system, and is not OPERATION capable of automatic operation with other transceiver mod- See the Operation section of the transceivers operating els. manual for details of ATAS-120 tuning and operation. 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. VERTEX STANDARD CO., LTD. m There are no user-serviceable parts inside this antenna. 4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan VERTEX STANDARD Reckless turning of the top of the antenna coil may result US Headquarters in breakage of the antenna coil wire and/or other internal 10900 Walker Street, Cypress, CA 90630, U.S.A. International Division damage. 8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, U.S.A. YAESU EUROPE B.V. SPECIFICATIONS P.O. Box 75525, 1118 ZN Schiphol, The Netherlands FREQUENCY RANGE: 7/14/21/28/50/144/430 MHz YAESU UK LTD. Amateur Bands Unit 12, Sun Valley Business Park, Winnall Close Winchester, Hampshire, SO23 0LB, U.K. H EIGHT (Approx.): 1.4 ~ 1.6 meters (4.59 ~ 5.24 feet) VERTEX STANDARD HK LTD. WEIGHT (Approx.): 900 g (1.98 lbs.) Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road, Kwun Tong, Kowloon, Hong Kong INPUT IMPEDANCE: 50W MAX. INPUT POWER: 120 Watts (A3J) MATCHED SWR: Less than 2.0:1 (with proper counterpoise) E A C 8 1 X 7 0 0 (Specifications subject to change without notice or obligation)