Outdoor Installation Considerations; Co-Locating Ds.11 Outdoor Units; Site Selection Factors - Alvarion BreezeNET DS.11 User Manual

Installation

2.6 Outdoor Installation Considerations

This chapter describes various considerations to take into account when planning
an outdoor installation including site selection, antenna alignment, antenna
polarization, antenna seal, and cell size.
Refer to Appendix B for further information.

2.6.1 Co-locating DS.11 Outdoor Units

Up to 3 BU-DS.11 units (the exact number depends on the regulatory domain) can be
co-located on the same building top or tower for best performance. Each unit is
assigned to one of the non-overlapping channels, 1, 7, or 13 in ETSI;
1, 6 or 11 on FCC.

2.6.2 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
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.
User's Guide 2-6 BreezeNET BU-DS.11/RB-DS.11