Sony Ericsson GTR-64 manual How to install the modem, Antenna

GTR64 http://www.matrix.es/GTR64

Tip! Before installing the modem, use an ordinary mobile telephone to check a possible location for it. In determining the location for the modem and antenna, you should consider signal strength as well as cable length.

7.1.3 Connections of components to GTR64 Terminal

The integrator is responsible for the final integrated system. Incorrectly designed or installed, external components may cause radiation limits to be exceeded. For instance, improperly made connections or improperly installed antennas can disturb the network and lead to malfunctions in the modem or equipment.

7.1.4 Network and Subscription

Before your application is used, you must ensure that your chosen network provides the necessary telecommunication services. Contact your service provider to obtain the necessary information.

•If you intend to use SMS in the application, ensure this is included in your (voice) subscription.

•Consider the choice of the supplementary services

7.2 How to install the modem

7.2.1 Power supply

•Use a high-quality power supply cable with low resistance. This ensures that the voltages at the connector pins are within the allowed range, even during the maximum peak current.

•When the unit is powered from a battery or a high current supply, connect a fast 1.25A fuse in line with the positive supply. This protects the power cabling and modem.

7.2.2 Securing the modem

Before securing the modem take into account the amount of additional space required for the mating connectors and cables that will be used in the application.

•Where access is restricted, it may be easier to connect all the cables to the modem prior to securing it in the application.

•Securely attach the GTR64 Terminal modem to the host application using two 3mm diameter pan-head screws

7.3 Antenna

7.3.1 General

The antenna is the component in your system that maintains the radio link between the network and the modem. Since the antenna transmits and receives electromagnetic energy, its efficient function will depend on:

•the type of antenna (for example, circular or directional);

•the placement of the antenna;

•communication disturbances in the vicinity in which the antenna operates.

In the sections below, issues concerning antenna type, antenna placement, antenna cable, and possible communication disturbances are addressed. In any event, you should contact your local antenna manufacturer for additional information concerning antenna type, cables, connectors, antenna placement, and the surrounding area.

You should also determine whether the antenna needs to be grounded or not. Your local antenna manufacturer might be able to design a special antenna suitable for your the application.

GTR64 Integrators Manual V.1.2 Pag. 28

Preliminary. Subject to change without prior notice