Rated Power of Vehicle-installed Mobile
Two-way Radio
Recommended Minimum Lateral Distance
from Transmitting Antenna
25 Watts with 1/4 dipole (2.14 dBi gain) 40 cm (15.75 inches)
Table B: Rated Power and Recommended Lateral Distance for Occupational/Controlled Exposure for
SDM600AC (150 MHz to 174 MHz).
Rated Power of Vehicle- installed Mobile
Two-way Radio
Recommended Minimum Lateral Distance
from Transmitting Antenna
25 Watts with 1/4 dipole (2.14 dBi gain) 75 cm (29.5 inches)
Table C: 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 1/4 dipole (2.14 dBi gain) 34 cm (13.5 inches)
Table D: Rated Power and Recommended Lateral Distance for Occupational/Controlled Exposure for
SDM600TU and SDM600UW (406.1 MHz to 512 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:
n All passengers must be sitting under a solid metal roof.
n 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).
Document Number: TNM-U-E-0145 Issue: 1.0 Page xiv
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