Installation Of The Wireless Cpu; Where To Install The Wireless Cpu; Gr64 Integrators Manual - Wavecom GR64 GSM/GPRS Integrator's Manual

7.4

Installation of the Wireless CPU

7.4.1

Where to Install the Wireless CPU

The following conditions need to be taken into consideration when designing the
application as they might affect the Wireless CPU and its function:
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7.4.1.1 Environmental Conditions
The Wireless CPU 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.
7.4.1.2 Signal Strength
The Wireless CPU 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 Wireless CPU is to a radio base station. The
integrator must ensure that the intended usage location 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. More information
about possible communication disturbances can be found in section 8.3.5, page 59.
When an application is completed, the integrator can verify signal strength by issuing
the AT command AT+CSQ or AT*E2EMM. See the AT Commands Manual for further
details.
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GR64 Integrators Manual

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Environmental conditions
Signal strength
Connection of components to Wireless CPU
Network and subscription
Before installing the Wireless CPU, use an ordinary mobile telephone to
check a possible location for it. In determining the location for the
radio device and antenna, the integrator should consider signal
strength as well as cable length.
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