Redline Access Node-50 User Manual page 13

AN-50 User Manual
some construction and electrical work, which can be best performed by
professional installers.
The following site survey steps should be followed:
Determine the optimum location: The first key step in the deployment exercise
is to determine and identify building candidates that can be used to support the
PTP link. A critical parameter to consider is the range at which the two terminals
are required to operate. Range performance is determined by empirical formulas
that consider a number of equipment and environmental factors described in
Section 8 of this manual. Ensure that the installation sites meet the above range
performance requirements before moving to the next step. There are a number of
cell planning tools available in the market today, which make use of topographic
data to help with the cell planning.
Obtain a copy of the facility blueprints and verify their accuracy. The
installation process will require penetrating the building to run the IF cable
between the outdoor and indoor units. In this regard, it is imperative that the
blueprints of the building are up to date and accurate.
Identify a Clear Line of Sight Path. For maximum performance, it is
recommended to mount the antenna in a location where there is line of sight to the
remote terminal. If possible, the antenna should be positioned such that there is
maximum clearance within the first Fresnel zone of the direct path. Refer to
Section 8 for a full description of Fresel zone clearance and its impact on signal
propagation. The best means of achieving Fresnel zone clearance is to mount the
antennas as high as possible, on either a tall building or tower, as shown in Figure
4. Although the system is designed to operate in obstructed line of sight (NLOS)
conditions, as a result of the OFDM technology it incorporates, LOS deployments
provide much greater throughput capability.
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