Mobile Antennas; Approved Accessories - Motorola GM338 Service Manual

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Table 1 lists the minimum lateral distance for bystanders in an uncontrolled environment from the
transmitting antenna at several different ranges of rated radio power for mobile radios installed in a
vehicle.
Rated Power of Vehicle-Installed
Less than 7 watts
7 to 15 watts
16 to 50 watts
51 to 110 watts

Mobile Antennas

• Install antennas at the center of the roof or the center of the trunk deck. These mobile antenna
installation guidelines are limited to metal body vehicles.
• The antenna installation must additionally be in accordance with:
a. The requirements of the antenna manufacturer/supplier
b. Instructions in the Radio Installation Manual
• Use only Motorola approved supplied antenna or Motorola approved replacement
antenna. Unauthorized antennas, modifications, or attachments could damage the radio and
may violate FCC regulations.

Approved Accessories

For a list of approved Motorola accessories please contact your dealer, or local Motorola
representative.
Fixed Site Antennas
If mobile radio equipment is installed at a fixed location and operated as a control station or as a fixed
unit, the antenna installation must comply with the following requirements in order to ensure optimal
performance and compliance with the RF energy exposure limits in the above standards and
guidelines.
• The antenna should be mounted outside the building on the roof or a tower if at all possible.
• 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 compli-
ance actions such as site survey measurements, signage, and site access restrictions in order to
insure that exposure limits are not exceeded.
ELECTROMAGNETIC INTERFERENCE/COMPATIBILITY
NOTE Nearly every electronic device is susceptible to electromagnetic interference (EMI) if inadequately
shielded, designed, or otherwise configured for electromagnetic compatibility. It may be necessary
to conduct compatibility testing to determine if any electronic equipment used in or around vehicles
or near fixed antenna sites is sensitive to external RF energy and if any procedures need to be fol-
lowed to eliminate or mitigate the potential for interaction between the radio transmitter and the
equipment or device.
Table 1: Rated Power and Lateral Distance
Mobile Two-way Radio
Minimum Lateral Distance
from Transmitting
Antenna
8 inches (20 centimeters)
1 foot (30 centimeters)
2 feet (60 centimeters)
3 feet (90 centimeters)
SAFETY INFORMATION