Site Preparation And Planning - Airspan ASWipLL Quick Installation And Configuration Manual

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Q u i c k I n s t a l l a t i o n & C o n f i g u r a t i o n G u i d e

Site Preparation and Planning

When preparing and planning the site, ensure the following:
Minimum obstructions (e.g. buildings) in the radio path between the Base Station radio (i.e. BSR) and the
subscriber radios (i.e. SPR/IDR).
Minimum incursions on Fresnel Zone (recommended minimum of 60% clearance of first Fresnel Zone).
Minimum multipath fading: Some of the transmitted signals may be reflected from a nearby building, by
water under the signal path, or from any other reflectors. This reflected ("bounced") signal can then be
received by the radio receiving the signal and superimposed on the main received signal, thereby,
degrading the signal strength. Airspan recommends installing the outdoor radios at the rear of the
building's roof instead of the front. When you install at the rear, the front of the building blocks incoming
signals from multipath reflections.
Clean frequencies selected from Spectrum Analyzer results (see Chapters 9 and 13).
Maximum received signal strength (RSS) at CPE by antenna alignment: For the IDR, RSS can be
measured by the IDR's built-in RSS LEDs; for the SPR, RSS can be measured by Airspan's WipConfig
program or by connecting Airspan's RSS LED Plug Adapter.
Radios are mounted as far as possible from sources of interference that could degrade performance of
radio. Ensure a minimum of 1-meter separation between co-located outdoor units.
Radios mounted as high as possible to avoid obstructions and to increase link quality.
BSR and SPR/IDR are within maximum range of reception.
Maximum length of 100 meters CAT-5 cable connecting outdoor radio units to indoor terminating units.
Sufficient wiring conduit and cable ties to channel and protect the CAT 5 cable connecting the outdoor
radio to the indoor hub/switch.
Required power source is available at the site.
8 Airspan Networks Inc.
AS W i p L L 9 0 0 M H z
13070311-02