User guide

Designing Your Canopy Network March 2005
Through Software Release 6.1
Issue 1 Page 107 of 425
Canopy System User Guide
12.4 SELECTING SITES FOR NETWORK ELEMENTS
The Canopy APs must be positioned
◦ with hardware that the wind and ambient vibrations cannot flex or move.
◦ where a tower or rooftop is available or can be erected.
◦ where a grounding system is available.
◦ with lightning arrestors to transport lightning strikes away from equipment.
◦ at a proper height:
− higher than the tallest points of objects immediately around them (such as
trees, buildings, and tower legs).
− at least 2 feet (0.6 meters) below the tallest point on the tower, pole, or roof
(for lightning protection).
◦ in line-of-sight paths
− to the SMs and BH.
− that will not be obstructed by trees as they grow or structures that are later
built.
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NOTE:
Visual line of sight does not guarantee radio line of sight.
◦ away from high-RF energy sites (such as AM or FM stations, high-powered
antennas, and live AM radio towers).
12.4.1 Resources for Maps and Topographic Images
Mapping software is available from sources such as the following:
◦ http://www.microsoft.com/streets/default.asp
− Microsoft Streets & Trips (with Pocket Streets)
◦ http://www.delorme.com/software.htm
− DeLorme Street Atlas USA
− DeLorme Street Atlas USA Plus
− DeLorme Street Atlas Handheld
Topographic maps are available from sources such as the following:
◦ http://www.delorme.com/software.htm
− DeLorme Topo USA
− DeLorme 3-D TopoQuads
◦ http://www.usgstopomaps.com
− Timely Discount Topos, Inc. authorized maps