Exhibit 4

0010-EX-PL-1998 Text Documents

Alligator Communications, Inc.

2002-03-11ELS_54223

[ SCaALA PROFESSIONAL ANTENNA SYSTEMS FOR TY—900 YAGI ANTENNA 10 dBd gain BROADCAST AND COMMUNICATIONS 890—960 MHz (broadband) The Scala TY—900 is a rugged broadband yagi antenna specifically designed for professional fixed—station applications in the 890—960 MHz band. The TY—900 is fabricated of 6061/T6 aluminum rod and seamless drawn pipe, anodized for maximum reliability and corrosion resistance. The hardware and fastenings are stainless steel. (asiaAd40o) b 11949ITUX4 The internal balun, coax feed and connector are sealed in a foam potting system to prevent moisture penetration and assure long service life in severe environmental conditions. The heavy aluminum mounting casting allows installation for _ ____4 V or H polarization. (Shown vertically polarized) a—~—_.4 Specifications: Frequency range 890—960 MHz (broadband) Gain 10 dBd Impedance 50 ohms K ._.__] VSWR < 1.5:1 maximum (1.35:1 typical) Polarization Horizontal or vertical Front—to—back ratio >20 dB Maximum input power 100 watts L.___] H—plane beamwidth 48 degrees (half—power) E—plane beamwidth 40 degrees (half—power) Termination N femaile H____ Weight 3 ib (1.4 kg) H—plane Dimensions 23 x 7 inches (584 x 178 mm) Horizontal pattern — V—polarization —a Equivalent flat plate area 0.31 ft? (0.03 m?) Vertical pattern — H—polarization Mpasaemamnls Wind survival rating 150 mph (240 kph) aipmanipu Aununonht Shipping dimensions 24 x 16 x 4 inches (610 x 406 x 102 mm) Shipping weight 5.0 ib (2.3 kg) Msommmmereed Mounting For masts of 1.25 to 2.375 inch # (32 to 60 mm) OD. See reverse for order information. Meaommmmmnsd Shammimacasd Bcmcmone E—plane Horizontal pattern — H—polarization SCALA ELECTRONIC CORPORATION Vertical pattern — V—polarization Post Office Box 4580 Phone: (541) 779—6500 Medford, OR 97501 (USA) Fax: (541) 779—3991 http://www.scala.net \ Mcsmm Scala Electronic Corporation is a member of the Kathrein Group 10065—B C8

[ ~ | . TY—900 SCALA YAGI ANTENNA P 10 dBd gain 890—960 MHz (broadband) ! [ !—""~! 4IqIUXZ4 [O p (esIioAa¥l) 23 inches [3 (584 mm) TCF TE TTE CCCHI 7 inches (178 mm) Y sE CC [C<I Order Information: Model Stock Code TY—900 91752—004 SCALA ELECTRONIC CORPORATION Post Office Box 4580 Phone: (541) 779—6500 Medford, OR 97501 (USA) Fax: (541) 779—3991 i http://www.scala.net o \ TCO All sp%cifications are subject to change without notice


Document Created: 2002-03-11 07:31:03
Document Modified: 2002-03-11 07:31:03
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