4 Safety and General information
MOBILE RADIO OPERATION AND EME EXPOSURE
To assure optimal radio performance and that human exposure to radio frequency
electromagnetic energy is within the guidelines referenced earlier in this document,
transmit only when people outside the vehicle are at least the minimum lateral distance
away from a properly installed, externally-mounted antenna. Table 1 lists the minimum
lateral distance for several different ranges of rated radio power.
Table 1 Rated Power and Lateral Distance
ANTENNA INSTALLATION
MOBILE ANTENNAS
Recommended mobile antenna installations are limited to metal body vehicles at the
centre of the roof and centre of the trunk deck locations.
The antenna installation must additionally be in accordance with:
a) The requirements of the antenna manufacturer/supplier
b) Instructions in the Radio Installation Manual
FIXED SITE ANTENNAS
Mobile radio equipment is sometimes installed at a fixed location and operated as a control
station or as a fixed unit. In such cases the antenna installation must comply with the
following requirements in order to assure optimal performance and make sure human
exposure to radio frequency electromagnetic energy is within the guidelines set forth in the
above standards:
• The antenna must be mounted outside the building
• Mount the antenna on a tower if at all possible
• If the antenna is to be mounted on a building then it must be mounted on the roof.
• As with all fixed site antenna installations, it is the responsibility of the licensee to
manage the site in accordance with applicable regulatory requirements and may
require additional compliance actions such as site survey measurements, signage, and
site access restrictions in order to insure that exposure limits are not exceeded.
Rated Power of Vehicle-installed Mobile
Two-way Radio
Minimum Lateral Distance from
Transmitting Antenna
Less than 7 Watts 20 Centimetres
7 to 15 Watts 30 Centimetres
16 to 50 Watts 60 Centimetres
More than 50 Watts 90 Centimetres
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