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Appendix B
Regulatory
XV6600WOC User Manual148
Hardware
Specications
XV6600WOC User Manual 149
variability is known as “measurement uncertainty.” When the FCC conducts post-grant testing of
a cell phone, it takes into account any measurement uncertainty to determine whether regulatory
action is appropriate. This approach ensures that when the FCC takes regulatory action, it will
have a sound, defensible scientic basis.
The FDA scientic staff reviewed the methodology used by the 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 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, the
FCC’s approach with measurement uncertainty will not result in consumers being exposed to
any known risk from the RF emitted by cellular telephones.
The 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 the FDA to believe
that a change to the FCC’s measurement policy may be appropriate, the FDA will contact the
FCC, and both agencies will work together to develop a mutually-acceptable approach.