Motorola MTM5400 Manuel d'installation télécharger pdf (Page 76)

76 MTM5400 Mobile Terminal Installation Manual INSTALLATION

Vehicle Antenna Installation

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 in this document, transmit only when people inside and

outside the vehicle are at least the minimum distance away from a properly installed, externally-

mounted antenna.The table below lists the minimum distance for several different ranges of rated

radio power.

Selecting an Antenna Site

1. Install the vehicle antenna external to the vehicle and in accordance with:

a. The requirements of the antenna manufacturer/supplier

b. The requirements of the vehicle manufacturer

2. The best mounting location for the antenna is in the centre of a large, flat conductive surface.

In almost all vehicles, mounting the antenna in the centre of the roof will satisfy these

requirements. A good alternate location is in the centre of the trunk lid. If you use the trunk lid,

ensure that the trunk lid is grounded by connecting grounding straps between the trunk lid

and the vehicle chassis.

3. Ensure the antenna cable can be easily routed to the radio. Ensure that the antenna cable is

routed separately and not in parallel to any other vehicle wiring or mobile radio cable wiring.

4. Check the antenna location for any electrical interference according to vehicle manufacturer

requirements.

5. Make sure the mobile radio antenna is installed at least 30 centimeters (1 foot) away from any

other antenna on the vehicle.

Table 18 Rated Power and Distance

Mobile Radio Rated Power

(see Note below)

Minimum Lateral Distance

from Vehicle Body

Less than 7 Watts 20 Centimetres (8 inches)

7 to 15 Watts 30 Centimetres (1 Foot)

16 to 39 Watts 60 Centimetres (2 Feet)

40 to 110 Watts 90 Centimetres (3 Feet)

If you are not sure of the rated power of your radio,

contact your Motorola representative or dealer and supply

the radio model number found on the radio model label.

If you cannot determine the rated power out, then assure

90 cm (3 feet) separation from the body of the vehicle.

It is recommended to mount the antenna outside the

vehicle. Also make sure your power cable is not placed

with the antenna in parallel. Interference can cause radio

to hang.

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Motorola MTM5400 Manuel d'installation Page 76