User's Manual
64
derived from the recommendations of two expert
organizations, the National Council 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, generally, the closer you are to a wireless base
station antenna, the lower the power output. Before a
phone model is available for sale to the public, it must be
tested and certified to the FCC that it does not exceed
the limit established by the government adopted
requirement for safe exposure. The tests are performed










