CM-42 Technical Description
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SEM/CX-02:0076/DES A
2.5.6 Over The Air Service Provisioning (OTA)
The CM-42 supports TIA/EIA/IS-683-A: Over-the-Air Service Provisioning of Mobile Stations in Spread Spectrum
Systems.
2.6 Hints For Integrating The Module
This section, which gives you advice and helpful hints on how to integrate the CM-42 with the application, should be
taken as a guide.
Note!
The circuits on the test board are not shielded. Therefore, take proper precautions for avoiding ESD and
EMI.
2.6.1 Precautions
Here is a list of preparations that you should make before beginning the integration work that is described in this
section.
•
Where to install the module.
•
Safety standards
•
Network and subscription
•
Antenna
2.6.2 Where To Install The Module
Make sure that the module is installed so that the environmental conditions, such as temperature, humidity,
vibration, etc., are not beyond the limits specified for it
Make sure that the signal strength is sufficient. To improve signal strength, move the antenna to another position.
Signal strength may depend on how close the module is to a radio base station. Degradation in signal strength
could be a result of disturbance from another source, for example, an electronic device nearby.
You can verify signal strength by issuing the AT command AT+CSQ. See the CM-42 AT Command Manual for a
descriptions of this and other useful AT commands.
Tip!
Before installing the module, use an ordinary mobile telephone to check a possible location for it. Consider
signal strength as well as cable length in determining the location for the module and antenna. That way, you will
find out if it is practical to install the module where you intended.
2.6.3 Safety Standards
You are responsible for observing your country’s safety standards and the relevant wiring rules, where applicable.
