User's Manual
Table Of Contents
- Contents
- Important Information
- Notices
- Description
- Installation
- Configuration
- Overview
- Accessing the Main Menu
- Configuring with the Main Menu
- Unit Identification
- Hardware/Software Revision
- System Software ROM Images
- System Current Status
- Network Configuration
- IP Filter Configuration
- RF Station Configuration
- Viewing Current RF Station Configuration
- Setting the Operating Mode
- General Equipment Setup for Performing RF Tests
- Setting Test Mode Timer Minutes
- Performing Link Monitor Test (Normal Mode)
- Performing Transmit and Receive Tests
- Performing the RSSI Test
- Setting the RF Transmit Status
- Setting the Link Monitor Period
- Setting Maximum Remote Distance (Base Station Only)
- Setting Link Monitor Remote Station Rank
- Adjusting Throttling (Remote Station Only)
- Setting Tx Power Automatically (Remote Station Only)
- Adjusting User Output Power Ceiling (Remote Station Only)
- Setting Signal Margin (Remote Station Only)
- Viewing Current Output Power Level Adjust
- Radio Module Configuration
- Viewing the Radio Module Configuration
- Setting Config Test Minutes
- Setting the Station Type
- Setting the Station Rank
- Setting the Center Frequency
- Setting Security Passwords
- Setting the Scrambling Code
- Setting the Acquisition Code
- Adjusting the Tx Power Level
- Setting a Base to Repeater Mode (Base Station Only)
- Setting System Symmetry Type (Base Station Only)
- Setting Dynamic Polling Level (Base Station Only)
- Setting Remote Unit RF Group
- Rebooting and Saving RF Module Configurations
- RF/Ethernet Statistics
- System Security
- System Commands
- Link Monitor Display
- Logout
- Setting Operating Mode with the Mode Button
- Command Line Interface
- Troubleshooting
- Appendix A: Planning Your Wireless Link
- Appendix B: Using HyperTerminal
- Appendix C: Configuring a Simple Data Network
- Appendix D: SNMP
- Appendix E: Technical Reference Information
- Appendix F: Menu Map
- Appendix G: Upgrading Software
- Glossary
- Index
Appendix A: Planning Your Wireless Link
114 AWE 120-24 Installation & Configuration Guide
Measure the Distance Between Units
Use a mapping method or GPS (global positioning system) to measure the distance between the base station
and each remote, and check the radio path to identify any obstructions in the site path between the two
antennas. Due to the high frequency and low output power permitted in the ISM bands, no obstructions can
exist between the base station antenna and the remote unit antennas.
Determine Shelter, Power and Environmental Requirements
AWE units must be located in a weatherproof environment (a room, EMS cabinet or shelter) with an
ambient temperature between 0º and 40º Celsius, and humidity from 0 to 95% non-condensing. Consider
building, electrical power, heating and air conditioning requirements.
Determining Antenna
and Cable Requirements
If you plan to install a unit indoors, on-site testing is advised because all interiors are unique. You need to
consider several factors.
• Ensure a clear line-of-sight radio path is available between each remote and its base station.
• Ensure that Fresnel zone clearances are met. Identify obstructions that could degrade link
performance now and in the future.
• Obtain permission from building owners if you intend to install the antenna on a rooftop
• Obtain 24-hour access to antennas, cables and equipment
• Determine antenna mounting positions: the final position should be selected to enable physical
shielding of the antenna at the back and sides from radio interference in the ISM band.
• Consider potential wind load and ice loading impact on the antenna
• Be aware of possible multipath effects: installing an antenna too close to reflective surfaces can cause
signal problems.
• Check local regulatory restrictions, such as height, on antenna mast usage in the identified location
• Ensure that your antenna is properly grounded and installed according to local electrical codes.
• Determine transmission cable lengths and plan cable routes. Minimize the length of the coaxial cable
because the longer the cable, the greater the cable losses.
• Calculate the fade margin—a minimum 15 dB fade margin is required to ensure the reliability of your
wireless link.
• Determine Ethernet cable lengths and plan cable routes.
More information about antennas is provided in Antenna Basics, page 120.
WARNING
Correct antenna installation is critical to the safe operation and
performance of your system. Antennas should always be professionally
installed.
!