Sony Ericsson TT4031 (SE-GM29) - Manual (Page 42)

Owner’s Manual Rev 1.0 Page 42 of 42
5. Installation of the Modem
This chapter gives you advice and helpful hints on how to integrate
the TT4031 (SE-GM29) into your application from a hardware
perspective. Please read the information given in Safety and Product
Care
and then the read the information in this section before starting your
integration work.
5.1 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:
5.1.1 Environmental Conditions
The modem must be installed so that the environmental conditions stated
in the Technical Data chapter, such as temperature, humidity and vibration
are satisfied. Additionally, the electrical specifications in the Technical Data
section must not be exceeded.
5.1.2 Signal Strength
The modem has to be placed in a way that ensures sufficient 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.
5.4.5 Degradation in signal strength can be the result of a disturbance from
another source, for example an electronic device in the immediate vicinity.
More information about possible communication disturbances can be found
in section Possible Communication Disturbances
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