Cabletron Systems 9033073 manual Potential Obstacles for a Directional Antenna

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Installation Guidelines

Overview of the Outdoor Installation

Figure 2-3 Potential Obstacles for a Directional Antenna

To minimize the influence of obstacles, signal interference or reflections please note the following guidelines:

Mount the antenna as high as possible above ground to allow maximum clearance:

— In open areas, ground is the actual surface of the earth

In dense urban areas ground is defined as the height of the highest obstacle in the signal path between the two antenna sites.

Avoid trees or other foliage in the signal path to prevent interference or signal absorption due to dynamic changes in seasons (leaves/ice).

Install the antenna at least 2 m (6 ft) away from all other antennas.

Other situations where reflections of the radio signal may cause interference are environments where large reflecting surfaces exist in parallel or partly perpendicular to the antenna beam.

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Outdoor Antenna Installation Guide

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Contents RoamAbout 802.11 Outdoor Antenna Installation Guide Page RoamAbout 802.11 Outdoor Antenna Installation Guide Page Regulatory Information CanadaOutdoor Antenna Installation Guide Getting Help Your email addressPage Table of Contents Determining Range & Clearance RoamAbout 14-dBi Directional Antenna Page Who Should Use This Guide IntroductionAbout This Guide Installation Guidelines Installing the AntennaOrganization of this Guide Introduction This ChapterAppendix C The Antenna Cabling System Appendix D Calculating Range & ClearanceRoamAbout Outdoor Kit Introduction Installing a RoamAbout Access Point Configuration and ManagementHardware Specifications Finding Additional InformationAdditional files on your diskettes Other Sources of InformationPage Installation Guidelines Site PrerequisitesPre-Installation Checklist Overview of the Indoor InstallationIndoor Installation Overview Selecting the Right RoamAbout PC CardRoamAbout PC Card Identification Installation Guidelines Placement of the RoamAbout Access Point Installation Guidelines Placement of the Lightning Protector Antenna Cable RouteInstallation Guidelines Overview of the Outdoor Installation Antenna Mast/Wall Bracket not included in kitAntenna Placement Potential Obstacles for a Directional Antenna Antenna Mast/Wall Bracket Tripod MountWall Side Mount Antenna Mast RequirementsGrounding System RoamAbout AntennasAntenna Polarization AP Manager Point-to-Point Diagnostics Screen Antenna AlignmentAntenna Cable Routing Before Climbing the Roof Page Determining Range Clearance Fresnel ZoneDetermining Range & Clearance Other Considerations Page Installing the Antenna Planning the Antenna InstallationSafety Precautions Electrical Hazard WarningsElectrical Hazard Warnings Installation Overview Mounting on a Mast Mounting the AntennaMounting the Directional Antenna Prevent damage to the plastic antenna mounting base Mounting on a Flat Surface Mounting the Omni-directional Antenna Mounting the 14-dBi Antenna to a WallMounting the Omni-Directional Antenna to a Mast Connecting the Antenna Cable Installing the Antenna Sealing the Cable Connectors General Description Contents of the Antenna BoxRoamAbout 14-dBi Directional Antenna Table A-1 Specifications 14-dBi Directional Antenna RoamAbout 14-dBi Directional AntennaRoamAbout 7-dBi Omni Directional Antenna RoamAbout 7-dBi Omni-Directional Antenna Outdoor Cabling Components Selecting the Correct Connector TypeAntenna Cabling System Table C-1 Selecting the Correct N-Type Connector Antenna Cabling SystemOutdoor Cabling Components RoamAbout Cable Assembly Table C-2 Cable Assembly SpecificationsTable C-3 Lightning Protector Specifications RoamAbout Lightning ProtectorInstallation Figure C-1 Lightning Protector InstallationRoutine Maintenance Table C-4 Cable Specifications for the 6m 20 ft Antenna Low-Loss Antenna CableTable C-5 Cable Specifications for the 15m 50 ft Antenna Table C-6 Cable Specifications for the 22m 75 ft AntennaPage Calculating Range Clearance IntroductionDynamic Range Budget Table D-1 Dynamic Range FCC MBit/s Omni-Directional 7-dBiTable D-2 Dynamic Range ETSI. France & Japan Link speed versus Range Determine Line-of-Sight ClearanceTable D-3 Minimum Clearance for Maximum Range Dynamic Range Minimum Clearance Maximum RangeCalculating Range & Clearance Determine Typical Range Table D-4 Actual Clearance and Typical Range Which Antenna do You Need