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ENJ OY THE FREEDOM OF WIRELESS NETWORKING
Outdoor Antenna
Site Preparation and Installation Guide
ENTERASYS.COM
P/N 9033348-05
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NOTICE Enterasys Networks reserves the right to make changes in specifications and other information contained in this document and its web site without prior notice. The reader should in all cases consult Enterasys Networks to determine whether any such changes have been made. The hardware, firmware, or software described in this document is subject to change without notice. IN NO EVENT SHALL ENTERASYS NETWORKS BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOE
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Notice Regulatory Information Canada The products included with the RoamAbout Outdoor Kit for outdoor antenna installations comply with GL-36 of Industry and Science Canada. FCC Notice Note: The devices included with the outdoor kit have been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates
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Notice When connecting RoamAbout devices to equipment other than the Enterasys Networks RoamAbout products described in this guide, the antenna installation may no longer comply with the regulations as defined above. In this case, it is the responsibility of the user to ensure that the entire antenna installation complies with local radio regulations. Consult the user documentation that came with the other equipment to determine whether additional instructions, cautions, or regulations app
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Contents Preface Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Associated Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii Getting Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents 3 Antenna Installation Installation Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Verify Component Connector Polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Grounding System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Lightning Protector Installation . . . . . . . . . . . . . . . . . . . . .
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Preface This guide describes the requirements that are needed for the successful installation of the RoamAbout outdoor antennas used in a RoamAbout wireless network. A RoamAbout wireless network consists of RoamAbout wireless products, such as the RoamAbout PC Card, RoamAbout Access Point, RoamAbout R2 Wireless Access Platform, and other wireless products that use an 802.11 Direct Sequence (DS) compliant radio. ELECTRICAL HAZARD: Only qualified personnel should perform installation procedur
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Associated Documents The documentation, drivers, and utilities can also be downloaded from the RoamAbout Wireless web site. Check the RoamAbout Wireless web site regularly for product upgrades. http://www.enterasys.com/wireless Component Information Location RoamAbout Access Point 2000 RoamAbout Access Point 2000 Hardware Installation Guide RoamAbout R2 Wireless Access RoamAbout R2 Wireless Access Platform Platform Hardware Installation Guide RoamAbout Access Point Manager RoamAbout 802.11 W
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Getting Help For additional support related to this device or document, contact Enterasys Networks using one of the following methods: World Wide Web: http://www.enterasys.com/wireless Phone: North America: (603) 332-9400 Europe: 353 61 701 910 Asia: +800 8827-2878 Internet mail: support@enterasys.com To send comments or suggestions concerning this document, contact the Enterasys Networks Technical Writing Department via the following e-mail address: TechWritin
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Document Conventions The following icons are used in this document: Icon Meaning ELECTRICAL HAZARD: Warns against an action that could result in personal injury or death. WARNING: Warns against an action that could result in WARNING personal injury or death. CAUTION: Contains information essential to avoid damage to the equipment. NOTE NOTE: Calls the reader’s attention to any item of information that may be of special importance. x
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Chapter 1 Site Preparation This chapter describes the site requirements that are needed for the successful installation of the RoamAbout outdoor antennas. It is intended for sales engineers or site evaluators. WARNING: Site prerequisites should be verified by a person familiar WARNING with national codes, local electrical codes, and with other regulations governing this type of installation. Enterasys Networks, its channel partners, resellers, and distributors assume no liability for persona
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Choosing a Wireless Network Configuration Choosing a Wireless Network Configuration The antennas you need depend on the wireless network configuration: • LAN-to-LAN, Point-to-Point This is a wireless link between two APs that connects two separate wired LANs. Typically, two directional antennas are used. • LAN-to-LAN, Point-to-Multipoint In a point-to-multipoint network, up to seven APs provide wireless links to connect up to seven LANs. One AP is designated as the central (multipoint) AP. The
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Determining the Antenna Locations Typically, the RoamAbout directional and omni-directional antennas are installed on rooftops. The directional antenna can also be installed to the side of a building. The vehicle-mount antenna is mounted to a vehicle and connected to the client with a 2.5 meter (8 foot) cable. The following sections describe the factors that affect the range of the antennas. Maximum Distances Between Antennas The following tables list the maximum distance between antennas at
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Determining the Antenna Locations Table 1-2: Distances and Line of Sight Clearance ETSI 1 1 Data 7 dBi Omni to 14 dBi Yagi to 14 dBi Yagi 14 dBi Yagi to 7 dBi Omni Rate Vehicle-Mount Mbit/s Distance Line of Distance Line of Distance Line of Sight Sight Sight Clearance Clearance Clearance 11 2.5 km 6.3 m 1.1 km 4.1 m 0.8 km 3.4 m (1.5 mi) (21 ft) (0.7 mi) (14 ft) (0.5 mi) (11.2 ft) 5.5 3.5 km 7.5 m 1.6 km 4.9 m 1.1 km 4.1 m (2.1 mi) (25 ft) (1 mi) (16 ft) (0.7 mi) (13.5 ft) 2 5 km 9.1 m 2
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Determining the Antenna Locations Other Factors That Can Reduce Antenna Range Large reflecting surfaces that are parallel or partly perpendicular to the radio signal cause reflections of the radio signal (see Figure 1-3). Examples of reflecting surfaces are buildings with low-emissivity (low-e) glass, crowded parking lots, water, moist earth, moist vegetation, and above-ground power or telephone lines. Because surrounding objects, such as trees, power lines, and other antennas, seriously red
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Determining the Antenna Locations Other Requirements The following describes other requirements to meet before installing the RoamAbout outdoor antennas. • Lightning Protection A lightning rod must be placed close to the antenna mast or wall bracket. This is required to protect the antenna from direct lightning strikes. • Grounding System Direct earth grounding of the antenna and the Lightning Protector is necessary to protect the installation from lightning and the build-up of static electr
