Andrew ION-B Series, Руководство пользователя

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167 MN024-010
Health and Safety Warnings
Please be aware that each country or governmental body has established its own specifi c
limits for RF exposure, to which the installation of any radiating antenna must conform. When
installing your ION-B system, take care to comply to your local regulations and guidelines about
RF exposure limits.
Antenna installation must conform to the following guidelines to meet FCC RF exposure limits,
otherwise an environmental evaluation is required if:
RSS Canadian standards
To meet RSS Canadian standards the following guidelines have to be taken into account:
• For any situation where multiple carrier signals are present, take care to reduce the single-
carrier output rating at least by 3.5dB, especially when the output signal is reradiated and
can cause interference with adjacent band users. This power reduction can be achieved
by reducing the input power which enters the TFLN input ports, not through an attenuator at
the output of the ION-B devices.
• To comply with the FCC exposure compliance requirements, the following antenna
installation and device operating conditions must be satisfi ed: The antenna(s) used in the
system must be installed to maintain at least a 20-cm separation distance from any person.
The highest allowed antenna gain, including coaxial cable loss, is 12dBi. RF exposure
compliance may need to be addressed at the time of licensing, as required by the
responsible FCC Bureaus(s), including antenna co-locating requirements of 1.1307(b)(3).
Electromagnetic Fields and RF Power
The ION-B system generates electromagnetic radiation, which can exceed safety levels in the
immediate vicinity of the antenna.
The most widely accepted standards are those developed by the International Commission on
Non-Ionizing Radiation Protection (ICNIRP) and the Institute of Electrical and Electronics Engineers
(IEEE).
Formula for minimum safety distances
The formula for calculating the minimum safety distances uses the specifi cations of a particular
antenna that could be driven by TFAx.
(6.1)
√
10 P
(G-L)
10
4•π•S
r
min
=