Alcatel OmniPCX Enterprise R7.1 Manuale di Installazione Scaricare il pdf (Pagina 118)

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4.8.2 Safety rules

4.8.2.1 ENVIRONMENTAL PROTECTION

For an exterior installation, it is necessary to take precautions against lightning affecting the

location of the Alcatel-Lucent 4070 IO/EO.

4.8.2.1.1 Conditions for using lightning protection:

Protection of Alcatel-Lucent 4070 IO/EO against lightning should be used when they:

- are less than 1.5 m from a wall more than 2 m below the antenna.

- use an external airborne connection between the base station and the system.

4.8.2.2 RECOMMENDATIONS FOR EXPOSURE OF THE PUBLIC TO THE

ELECTROMAGNETIC FIELD

4.8.2.2.1 MAGNETIC ABSORPTION RATE

Exposure of the public to the electromagnetic field from DECT sets and base stations is

measured using the Specific Absorption Rate (SAR) measuring unit. 2W/kg is the SAR limit

value indicated in international recommendations and also in the European recommendation

(1999/519/EC).

The DECT authorised SAR limit value is 2 Watts/kilogram on 10g of body tissue (local SAR).

International recommendations include a safety margin for the public and take account of

possible measuring variations.

SAR values

- Set: as the average power emitted from a set is lower than 20mW, the set is considered to

comply without having to undergo any tests (see: EN 50371). The SAR value for DECT

sets (e.g.: Mobile Reflexes) is not significant.

- Base station: the local SAR (head and chest) on 10g of body tissue for DECT base

stations (e.g.: 4070) is lower than 0.5 W/kg (this is with an integrated omni-directional

antenna).

4.8.2.2.2 ANTENNAE CHARACTERISTICS

Integrated antennae

The following is a list of characteristics for integrated antennae:

- Bandwidth: 1.88 to 1.93 Ghz

- Impedance: 50 Ohms

- TOS: 1.5:1

- Gain: 3 dBi (maximum)

- Polarization: vertical (axis of the antenna)

- Width of the beam at 3 dB (vertical): 90º

- Radiation diagram: omni-directional in the horizontal plane.

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Alcatel OmniPCX Enterprise R7.1 Manuale di Installazione Pagina 118