Alvarion BU-DS.11, RB-DS.11 Outdoor Installation Considerations

Installation

2-5

Outdoor Installation Considerations

This section describes various considerations to take into account when planning

an outdoor installation including site selection, antenna alignment, antenna

polarization, antenna seal, and cell size.

Collocating DS.11 Outdoor Units

Up to three BU-DS.11 units with omni-directional antennas (the exact number

depends on the number of non-overlapping channels available in the relevant

regulatory domain) can be collocated on the same building top or tower.

Collocating more than three units may decrease performance depending upon the

type of antenna and its direction. Each unit should be assigned to one of the non-

overlapping channels: 1, 7, or 13 in ETSI or 1, 6 or 11 in FCC.

The antennas of collocated units should be mounted at least 60 cm (2 feet) apart

when using UNI-16’s, 4.5 m (15 feet) apart when using UNI-24’s, and 21 m (75

feet) apart when using OMNI-8’s. Omni antennas must be separated also vertically.

Greater separation will improve the link distance.

Site Selection Factors

When selecting a location for outdoor units and external antennas, remember to

take into consideration the following guidelines:

♦ Minimum distance between sites.

♦ Maximum height above the ground.

♦ Maximum line of sight clearance.

Path of Clearest Propagation

A propagation path is the path that signals traverse between the antennas of any

two units. The “line” between two antenna sites is an imaginary straight line,

which may be drawn between the two antennas. Any obstacles in the path of the

“line” degrade the propagation path. The best propagation path is, therefore, a

clear line of sight with good clearance between the “line” and any physical obstacle.

Physical Obstacles

Any buildings or other physical structures such as trees, mountains or other

geographic features higher than the antenna and situated in the path between the

two sites can constitute obstructions and cause signal attenuation. Install outdoor

antennas high enough to avoid any obstacles that may block the signal.

Contents

Main Page iii Trade Names Statement of Conditions Warranties; Disclaimers Exclusive Warranty iv Disclaimer v Limitation of Liability Electronic Emission Notices FCC Radio Frequency Interference Statement vi FCC Radiation Exposure Statement Antenna Installation vii Important Notice viii Contacting Alvarion Technical Support www.alvarion.com/support.htm User Manual Table of Contents Introduction 1-1 Installation 2-1 The DS.11 Configuration Utility 3-1 Configuration Guidelines 4-1 System Troubleshooting 5-1 Technical Specifications 6-1 DS.11 FAQ A-1 Preparing the Indoor to Outdoor Cable 1 Radio Signal Propagation 1 Table of Figures Table of Tables 1-1 Chapter 1 1-2 Scope of the Manual 1-3 System Description Functional Description BU-DS.11 Wireless Base Unit 1-4 RB-DS.11 Wireless Bridge BreezeNET DS.11 Compatibility and Standards 2-1 Chapter 2 2-2 Packing List Additional Installation Requirements Installation Overview 2-4 2-5 Outdoor Installation Considerations Collocating DS.11 Outdoor Units Site Selection Factors Path of Clearest Propagation Physical Obstacles Rooftop Installation Antennas for Outdoor Applications The Point-to-Point Point-to-Multipoint Antenna Seal Cell Size/Link Distance Using Outdoor Range Tables Available Antennas Precautions Compliance with Radio Regulations 2-9 Installing the Outdoor Unit 2-10 2-11 Connecting the Ground and Antenna Cables 1. 2. Connecting the Indoor-to-Outdoor Cable Page 2-13 Installing the Indoor Unit 1. 2. 3. 4. Configuring Parameters Antenna Alignment 1. 2. 2-15 Verifying Correct Operation Verifying Correct Operation of the Indoor Unit Table 2-2: Indoor Unit LEDs Verifying Correct Operation of the Outdoor Unit 2-16 What to do if the Self Test Fails 3-1 Chapter 3 3-2 Installing and Accessing the Configuration Utility 1. 2. 3. 4. Configuration Utility Modes Unit Configuration Mode Control Window Tabs Section 3-4 Control Window Selecting Units Setting the SNMP Community String Assigning and Editing IP Addresses Manually (based on MAC addresses) 1. Application Control Buttons Configuration Utility Tabs Station Status Tab 3-6 Networking Parameters Tab Networking Parameters-General Tab IP Parameters 3-7 DHCP VLAN Support 3-8 3-9 Networking Parameters-CPE Table Tab (BU only) 3-10 3-11 SNMP Parameters Tab 3-12 Counters Tab 3-13 3-14 WLAN Parameters Tab 3-15 3-16 Table 3-1: Regulatory Domains Specifications Table 3-2: Frequency List 3-17 Station Control Tab 3-18 Security Tab Encryption Tab 3-19 3-20 ACL Table Tab (BU only) 3-21 Advanced Tab 3-22 3-23 General Parameters Tab 3-24 3-25 3-26 Auto-Config Tab 3-27 Trap Monitor Tab 3-28 Firmware Upgrade Mode 1. 2. 3. Advanced TFTP Settings 3-30 Multiple Unit Configuration Mode 3-31 Resetting the SNMP Community Strings Reloading Factory Default Settings 1. 2. Page 4-1 Chapter 4 4-2 Configuring Critical Parameters One-Click Configuration Short Preamble CW Minimum 4-3 RTS Threshold Basic Rate Range Page 5-1 Chapter 5 5-2 Troubleshooting Guide 6-1 Chapter 6 Supported Standards Configuration and Management 6-2 Radio Range Security Page Page A-1 Appendix A A-2 General A-3 A-4 Collocation and Interference A-5 Firmware A-6 Configuration A-7 Accessories A-8 Management B-1 Appendix B 1. 2. Page C-1 Appendix C RF Terms and Definitions dB RF Power Level C-2 Attenuation P For example: If, due to attenuation, half the power is lost (P Path Loss Free Space Loss Antenna Characteristics C-4 Directional Antenna Antenna Beamwidth System Characteristics Receiver Sensitivity EIRP (Effective Isotropic Radiated Power) Si = P C-5 Link Parameters Link Budget Calculation Signal Fading C-6 The Line of Sight Concept Clear Line of Sight Fresnel Zone R = :