BFW
Installation Guide
AN-30e & AN-50e Systems
Chapter
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2.1 Site
Survey
The RF signal path profile is required to determine the location, height, and aiming
requirements for installation of the wireless system radio/antenna.
2.1.1 Site Path Survey
Before the installation of the equipment, a site survey should be completed. Copies
of this survey data must be provided to the installation team. This data should
include the following:
1. Copies of the path profile so that the installation height requirements of ODU
can be determined. The path profile should show the clearance above natural
and man-made objects by at least 60% of the First Fresnel zone. This will
provide a clear line-of-sight (LOS) path.
Figure 1: Fresnel Zone Radius
2. The Redline system is very robust and will work without performance
degradation in an optical line-of-sight (OLOS) path where a straight path is
clear between the two end points but the 60% of the First Fresnel zone is not
clear. If the straight path is blocked, the non-line-of-sight (NLOS) path can still
operate using reflections and diffraction.
Figure 2: Fresnel Zone Obstruction
A critical parameter to consider is the range at which communicating wireless
systems are required to operate. Range performance is determined by empirical
formulas that consider a number of equipment and environmental factors.
70-00042-01-02
Proprietary Redline Communications © 2005
August
2005
Page 9 of 34
