Rainbow-electronics GT864-PY User Manual download pdf (Page 19)

GT864-QUAD/PY Hardware User Guide

1vv0300756 Rev.0 08/05/07

8 Installation of the modem

This chapter gives you advice and helpful hints on how to integrate the GT864-QUAD/PY Terminal

into your application from a hardware perspective. Please read the information given in “Safety and

Product Care”, chapter 7 and then read the information in this section before starting your integration

work.

8.1 Where to install the modem

There are several conditions which need to be taken into consideration when designing your

application as they might affect the modem and its function. They are:

Environmental conditions: The modem must be installed so that the environmental conditions stated

in the GT864-QUAD/PY Product Description, such as temperature, humidity and vibration are

satisfied. Additionally, the electrical specifications in the Technical Data section must not be exceeded.

GSM Signal strength:

The modem has to be placed in a way that ensures sufficient GSM signal

strength.

To improve signal strength, the antenna can be moved to another position. Signal

strength

may depend on how close the modem is to a radio base station. You must

ensure that the location at

which you intend to use the modem, is within the network

coverage area. Degradation in signal

strength can be the result of a disturbance from

another source, for example an electronic device in

the immediate vicinity. When an application is completed, you can verify signal strength by issuing the

command AT+CSQ. See “AT+CSQ Signal Strength”.

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.

Connections of components to GT864-QUAD/PY 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.

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

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