Rated Power of Vehicle- installed
Mobile Two-way Radio
Recommended Minimum Lateral Distance from
Transmitting Antenna
25 Watts with l/4 dipole (2.14 dBi
gain)
75 cm (29.5 inches)
Table 6: Rated Power and Recommended Lateral Distance for General Population Uncontrolled Exposure
for SDM600TU and SDM600UW (406.1 MHz to 512 MHz).
Rated Power of Vehicle- installed
Mobile Two-way Radio
Recommended Minimum Lateral Distance from
Transmitting Antenna
25 Watts with l/4 dipole (2.14 dBi
gain)
34 cm (13.5 inches)
Table 7: Rated Power and Recommended Lateral Distance for Occupational/Controlled Exposure for
SDM600TU and SDM600UW (406.1 MHz to 480 MHz).
Vehicle Installation Instructions
The antenna(s) used for the SDM600 series of mobile two-way radios must be installed
to provide a separation distance of at least 90 cm (35.5 inches) from all persons for
SDM600AC (150 MHz -174 MHz), 75 cm (29.5 inches) for SDM600TU and SDM600UW
(406.1 MHz – 512 MHz). The gain of the antenna(s) may not be greater than 0 dBd
(2.14 dBi).
If the required separation distance extends beyond the physical boundary of the
vehicle, the antenna must be installed on the centre of the roof ONLY and must be
installed in a vehicle having the following characteristics in order to prevent
bystanders from being exposed to levels exceeding the limits set for General
Population/Uncontrolled exposure environment:
• All passengers must be sitting under a solid metal roof.
• The rooftop width must be at least 180 cm (71 inches) for SDM9000AC (150 MHz
– 174 MHz), 150 cm (59 inches) for SDM600TU and SDM600UW (406.1 MHz – 512
MHz).
Mobile Antenna
• Install the antenna at the centre of the roof or the centre of the trunk deck,
taking into account the bystander exposure conditions of backseat passengers and
recommended minimum lateral distances in Tables 1(a) and 2(a). These mobile
antenna installation guidelines are limited to metal body motor vehicles or vehicles
with appropriate ground planes.
• The antenna installation must additionally be in accordance with:
o The requirements of the antenna manufacturer/supplier.
o Instructions in the Radio Installation Manual, including minimum antenna
cable lengths.
o The installation information of how to install the antenna to facilitate
recommended operating distances to all potentially exposed persons.
Doc Number: TNM-U-E-0055 ISSUE 4.0 Page 78
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