Alvarion SW VERSION 5.1 system manual Equipment Positioning Guidelines

Equipment Positioning Guidelines

2.2Equipment Positioning Guidelines

This section provides key guidelines for selecting the optimal installation locations for the various BreezeACCESS VL system components.

CAUTION

ONLY experienced installation professionals who are familiar with local building and safety codes and, wherever applicable, are licensed by the appropriate government regulatory authorities should install outdoor units and antennas.

Failure to do so may void the BreezeACCESS VL product warranty and may expose the end user or Service Provider to legal and financial liabilities. Alvarion and its resellers or distributors are not liable for injury, damage or regulation violations associated with the installation of Outdoor Units or antennas.

Select the optimal locations for the equipment using the following guidelines:

„The outdoor unit can be either pole or wall mounted. Its location should enable easy access to the unit for installation and testing.

„The higher the placement of the antenna, the better the achievable link quality.

„AU-ODU units should be installed as close as possible to the antenna.

„The antenna connected to the AU-ODU unit, should be installed so as to provide coverage to all Subscriber Units (SUs) within its service area.

NOTE

The recommended minimum distance between any two antennas serving adjacent sectors is 2 meters. The recommended minimum distance between two antennas serving opposite cells (installed back-to-back) is 5 meters.

„The antenna of the SU (integrated or external)) should be installed to provide a direct, or near line of sight with the Base Station antenna. The antenna should be aligned to face the Base Station.

„In some cases it might be necessary to up/down-tilt the antenna. An optional Tilt accessory for the ODU providing a tilt range of +/-15° is available from Alvarion. The tilt option might be necessary to either improve the link conditions or, if the SU is too close to the Base Station, to reduce the receive signals strength. As a rule of thumb, if the SU is located at a distance of less than 300 meters from the Base Station, it is recommended to up-tilt the antenna by approximately 10° to 15° (especially in line-of-sight conditions) to avoid saturation of the receivers by too strong signals.

Installation

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