Rainbow Electronics GT864-PY - Manual (Page 19)

GT864-QUAD/PY Hardware User Guide
1vv0300756 Rev.0 08/ 05/07
Reproduction forbidden w ithout Telit Communications S.p.A. w ritten authorization - All Rights Reserved page 19 of 23
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
AT
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