CEP HT63 E Manuel de l'utilisateur - Page 20

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5.1.4 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

5.2.1 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.

5.2.2 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 HT63-E Terminal modem to the host application using two 3mm diameter pan-

head screws

5.3 Antenna

5.3.1 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 the application.