User's Manual

Installation
User's Manual 2-8 BreezeNET DS.11
2.3 Outdoor Installation Considerations
This chapter describes various considerations to take into account when planning
an outdoor installation. This includes site selection, antenna alignment, antenna
diversity, antenna polarization, antenna seal, and cell size.
2.3.1 Site Selection Factors
When selecting a location for external antennas, remember to take into
consideration the following guidelines:
Minimum distance between sites
Maximum height above the ground
Maximum line of sight clearance
Maximum separation between antennas (diversity option)
Path of Clearest Propagation
A propagation path is the path that signals traverse between the antennas of any
two bridges. 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 physical object in the path between two bridges can cause signal attenuation.
Common obstructions are buildings and trees. If a bridge’s antenna is installed
indoors, the walls and/or windows between the two sites are physical obstructions.
If the antenna is positioned outdoors, any buildings or other physical structure such
as trees, mountains or other natural geographic features higher than the antenna and
situated in the path between the two sites can constitute obstructions.