Appendix D Electromagnetic Radiation; Introduction; Maximum Permissible Exposure - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station

Appendix D Electromagnetic Radiation

D.1 Introduction
The BTS has RF radiation (Radiation Hazard). Although there is no scientific evidence
of possible health risks to persons living near the BTSs, some recommendations are
giving below for the installation and operation of BTS.
Maximum Permissible Exposure (MPE) limits are specified by the Federal
Communications Commission (FCC). FCC CFR part 1, subpart I, section 1.1307
requires operator to perform a Enviromenta Assemessmet (EA).
Equipment listed in the table 1 of before mentioned part are subjected to routine
environmental evaulation.
licensees and manufactuere are required tto ensure that their facility and equipment
comply with IEEE C95.1-1991.
The objective of the Environmental Evaluation is to ensure that human exposure to RF
energy does not go beyond the maximum permissible levels stated in the standard.
Therefore certain sites do not require an evaluation by nature of its design. It could be
that the antennas are placed high enough thereby resulting in extremely low RF fields
by the time it reaches areas that would be accessible to people.
Environmental evaluations are required, for Paging and Cellular Radiotelephone
Services, Part 22 Subpart E and H.
Non-rooftop antennas: height of radiation center < 10m above ground level and
total power of all channels > 1000 W ERP (1640 W EIRP)
Rooftop antennae: total power of all channels > 1000 W ERP (1640 W EIRP)
D.2 Maximum Permissible Exposure
Maximum Permissible Exposure (MPE) refers to the RF energy that is acceptable for
human exposure. It is broken down into two categories, Controlled and Uncontrolled.
Controlled limits are used for persons such as installers and designers that are in
control of the hazard and exposed to energy for limited amounts of time per day.
Occupational/controlled limits apply in situations in which are persons are exposed as a
consequence of their employment provided those persons are fully aware of the
potential for exposure and can exercise control over their exposure. Limits for
occupational/controlled exposure also apply in situations when an individual is
Appendix D Electromagnetic Radiation
For facilities and operations licensed under part 22,
D-1
System Principle