Enterasys Networks 9033348-02 manual Other Factors That Can Reduce Antenna Range

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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 reduce efficiency of the antenna, it is very important to mount the antenna as high and clear of obstacles as possible.

Figure 1-3: Large Reflecting Surfaces

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Large storage tanks which are common in industrial areas

Site Preparation 1-7

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Contents Outdoor Antenna Site Preparation and Installation Guide Page Page Regulatory Information Electrical Hazard Warnings Page Contents Antenna Installation Intended Audience PrefaceComponent Information Location Associated DocumentsAddress TechWriting@enterasys.com Getting HelpIcon Meaning Document ConventionsChapter Site Preparation Choosing a Wireless Network ConfigurationMaximum Distances Between Antennas Determining the Antenna LocationsDistances and Line of Sight Clearance FCC Line of Sight RoamAbout PC Card VariationsFresnel Zone and Line of Sight Clearance Potential Obstacles to Line of Sight not to scale Large Reflecting Surfaces Other Factors That Can Reduce Antenna RangeOther Requirements Installer is responsible for local building codesRoamAbout 5 dBi Vehicle-Mount Antenna Antenna OptionsKIT RoamAbout 14 dBi Directional AntennaExample Outdoor Yagi Antenna Configuration Antenna KIT RoamAbout 7 dBi Omni-Directional AntennaExample Omni-Directional Antenna Configuration Line of Sight Contacting an Antenna Installation CompanyLightning Protection Mounting RequirementsInstallation Requirements Page Determining the Location of the Access Point Chapter Access Point Placement ConfigurationAccess Point 2000 Installation Overview Overview of Connecting Cables to the Access PointOverview of Connecting Cables to the Access Point Settings from the RoamAbout Access Point Installation Menu Overview of the Access Point ConfigurationRoamAbout Access Point Manager Overview of the Access Point Configuration Chapter Antenna Installation Verify Component Connector Polarity Installation OverviewSelecting the Correct N-Type Connector Grounding System Lightning Protector InstallationLightning Protector Installation Mounting the Antenna Antenna Polarization Antenna Cables section on Mounting the Directional AntennaMounting the 14 dBi Antenna to a Mast Mounting the Omni-Directional Antenna Mounting the Omni-Directional Antenna to a Mast Mounting the Vehicle-Mount Antenna Mounting the Vehicle-Mount AntennaAntenna Cable Route Connecting the Antenna CablesConnecting the Cables Optimizing RoamAbout Outdoor Antenna Placement Routine Maintenance RoamAbout 14 dBi Directional Antenna Table A-1 14 dBi Directional Antenna SpecificationsRoamAbout 14 dBi Directional Antenna RoamAbout 7 dBi Omni-Directional Antenna Table A-2 7 dBi Omni-Directional Antenna SpecificationsVehicle-Mount Antenna Table A-3 Vehicle-Mount Antenna SpecificationsRoamAbout Pigtail Connection Table A-4 Pigtail Connection SpecificationsLow-Loss Antenna Cable Mechanical SpecificationsConnectors RoamAbout Lightning Protector Table A-8 Lightning Protector Specifications