User Guide

AB-Access Config & User Guide 5.5 Axxcelera Broadband Wireless
July 27, 2004 Company Confidential Page 3 of 129
PLEASE READ THESE SAFETY PRECAUTIONS!
RF Energy Health Hazard
Professional installation required. The radio equipment described in this guide uses radio
frequency transmitters. Although the power level is low, the concentrated energy from a directional
antenna may pose a health hazard.
Use the following chart for determining the minimum safe distance. Do not allow
people to come within the minimum safe distance of the antenna while the transmitter is
operating.
Peak Gain of
Antenna
Minimum
Safe Distance
18 dBi 20 cm
20 dBi 20 cm
23 dBi 25 cm
25 dBi 32 cm
30 dBi 56 cm
37.6 dBi 135 cm
Protection from Lightning
Article 810 of the US National Electric Department of Energy Handbook 1996 specifies that
radio and television lead-in cables must have adequate surge protection at or near the point of entry
to the building. The code specifies that any shielded cable from an external antenna must have the
shield directly connected to a 10 AWG wire that connects to the building ground electrode.