Installation Guide

BBXHardwareInstallationGuide 1_3.doc
November 25, 2004
Page 12 of 16
Suite 230, 2891 Sunridge Way NE, Calgary Alberta, T1Y 7K7
♦ Phone: [phone] ♦ Fax: [phone]
RF RADIATION SPECS
1 FCC Radio Frequency Exposure Rules
Based on FCC rules 2.1091 and 2.1093 and FCC Guidelines for Human Exposure to
Radio Frequency Electromagnetic Fields, OET Bulletin 65 and its Supplement C, all radio
units are subject to routine environmental evaluation for radio-frequency (RF) exposure
prior to equipment authorization or use.
For mobile devices, defined as a transmitting device designed to be generally used such
that a separation distance of at least 25 cm is maintained between the 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 mW/cm
2
.
2 How to Comply with FCC SAR/MPE Guidelines
In order to comply with FCC SAR/MPE Guidelines the antenna must be placed a
minimum of 25 cm from the vehicles edge. To accomplish this, and to ensure optimum
antenna performance Mentor Engineering recommends that antenna be installed in the
center of the vehicle rooftop.
WARNING
The user should be instructed to maintain the minimum distance from the antenna.
3 SAR and MPE Limits
SAR limits for General Population/Uncontrolled exposure is 1.6W/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 BBX applications.
The limit for MPE is 0.6mW/cm
2
at 900 MHz.
RF exposure distance is based on normal operating proximity to the user’s or nearby
persons’ body. This distance is measured from any part of a radiating structure, generally
the antenna, to the closest part of the body.
4 Labelling
If the antenna is installed at least 25 cm from the vehicle’s edge no warning label is
required.
If the antenna is not at least 25 cm from any vehicle edge, an additional RF radiation
hazard label that warns the user or nearby persons to keep away from the antenna by the
specified distance is required. This is because the minimum separation distance of the