User guide

Canopy System User Guide Selecting Sites for Network Elements
pmp-0229 (Mar 2013)
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• 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:
o higher than the tallest points of objects immediately around them (such as trees,
buildings, and tower legs).
o at least 2 feet (0.6 meters) below the tallest point on the tower, pole, or roof (for lightning
protection).
• away from high-RF energy sites (such as AM or FM stations, high-powered antennas, and
live AM radio towers).
• in line-of-sight paths
o to the SMs and BH.
o that will not be obstructed by trees as they grow or structures that are later built.
NOTE:
Visual line of sight does not guarantee radio line of sight.
Surveying Sites
Factors to survey at potential sites include
• what pre-existing wireless equipment exists at the site. (Perform spectrum analysis.)
• whether available mounting positions exist near the lowest elevation that satisfies line of site,
coverage, and other link criteria.
• whether you will always have the right to decide who climbs the tower to install and maintain
your equipment, and whether that person or company can climb at any hour of any day.
• whether you will have collaborative rights and veto power to prevent interference to your
equipment from wireless equipment that is installed at the site in the future.
• whether a pre-existing grounding system (path to Protective Earth ) exists, and what is
required to establish a path to it.
• who is permitted to run any indoor lengths of cable.
Assuring the Essentials
In the 2.4-, 5.2-, 5.4-, and 5.7-GHz frequency band ranges, an unobstructed line of sight (LOS)
must exist and be maintainable between the radios that are involved in each link.