Quick start guide

85
Safety
exceed the emission limits for exposure
to radiofrequency (RF) energy set by the
Federal Communications Commission
(FCC) of the U.S. Government. These
FCC exposure limits are derived from
the recommendations of two expert
organizations, the National Counsel on
Radiation Protection and Measurement
(NCRP) and the Institute of Electrical
and Electronics Engineers (IEEE). In
both cases, the recommendations
were developed by scientific and
engineering experts drawn from
industry, government, and academia
after extensive reviews of the scientific
literature related to the biological effects
of RF energy.
The exposure limit for wireless mobile
phones employs a unit of measurement
known as the Specific Absorption Rate,
or SAR. The SAR is a measure of the rate
of absorption of RF energy by the human
body expressed in units of watts per
kilogram (W/kg). The FCC requires wireless
phones to comply with a safety limit of
1.6 watts per kilogram (1.6 W/kg). The FCC
exposure limit incorporates a substantial
margin of safety to give additional
protection to the public and to account for
any variations in measurements.
Tests for SAR are conducted using
standard operating positions specified
by the FCC with the phone transmitting
at its highest certified power level in all
tested frequency bands. Although SAR
is determined at the highest certified
power level, the actual SAR level of
the phone while operating can be well
below the maximum value. Because
the phone is designed to operate at
multiple power levels to use only the
power required to reach the network, in