Nokia 6638 User Manual page 133

instrument accuracy, because test measurement and actual
use environments are different, and other variable factors.
This inherent variability is known as "measurement
uncertainty." When FCC conducts post-grant testing of a cell
phone, FCC takes into account any measurement uncertainty
to determine whether regulatory action is appropriate. This
approach ensures that when FCC takes regulatory action, it
will have a sound, defensible scientific basis.
FDA scientific staff reviewed the methodology used by FCC to
measure cell phone RF, and agreed it is an acceptable
approach, given our current understanding of the risks
presented by cellular phone RF emissions. RF emissions from
cellular phones have not been shown to present a risk of
injury to the user when the measured SAR is less than the
safety limits set by FCC (an SAR of 1.6 w/kg). Even in a case
where the maximum measurement uncertainty permitted by
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current measurement standards was added to the maximum
permissible SAR, the resulting SAR value would be well below
any level known to produce an acute effect. Consequently,
FCC's approach with measurement uncertainty will not result
in consumers being exposed to any known risk from the RF
emitted by cellular telephones.
FDA will continue to monitor studies and literature reports
concerning acute effects of cell phone RF, and concerning
chronic effects of long-term exposure to cellular telephone RF
(that is, the risks from using a cell phone for many years). If
new information leads FDA to believe that a change to FCC's
measurement policy may be appropriate, FDA will contact FCC
and both agencies will work together to develop a mutually-
acceptable approach.
Updated July 29, 2003