User's Manual

6 Introduction – FCC radio frequency exposure rules
Integrator’s Guide – RIM 902M OEM Radio Modem
body of the user and the transmitting radiated structure, the human exposure to
RF radiation can be evaluated in terms of Maximum Permissible Exposure
(MPE) limits for field strength or power density in mWatts/cm
2
.
RIM will submit module specific information and test reports for a generic
MPE compliance. For an end product not covered by RIM testing and
submission, the integrator will submit for a separate FCC ID. The submission
should include end product information, end product SAR/MPE test report and
a reference to RIM module FCC ID for all other Part 90 requirements.
SAR and MPE limits
SAR limits for General Population/Uncontrolled exposure is 1.6 W/kg for
partial body exposure, averaged over 1 g of tissue and 4 W/kg for hands, wrists
and feet averaged over 10 g of tissue. The limits for Occupational/Controlled
exposure are more relaxed, i.e., 8 W/kg for partial body and 20 W/kg for hands,
wrists and feet. The 1.6 W/kg limit applies for most of RIM OEM integrators.
The limit for MPE is 0.6 mW/cm
2
at 900 MHz.
Guidelines
RF exposure distance is based on normal operating proximity to the user’s
body. This distance is measured from the feed point of the antenna to the
closest body part. A test need to be performed to determine the passing distance
that meets the exposure limits.
Operating manual compliance statement
The integrator should include a statement in their operation/user/installation
manual making the user aware of RF exposure issues and insuring that the
users keep a passing distance from the antenna while transmitting.
Also the integrator should provide instructions or diagrams in the manual for
proper antenna mounting and position, when applicable, to ensure a safe
exposure distance to the operator and nearby persons.