WM_PRJ_Q2400_PTS_005 -007
18th January 2006
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6 EMC recommendations
The EMC tests have to be performed as soon as possible on the application to
detect any possible problem.
When designing, special attention should be paid to:
• Possible spurious emission radiated by the application to the RF receiver
in the receiver band
• ESD protection on SIM (if accessible from outside), serial link, etc. Refer to
section 2.2.6 SIM interface.
• Length of the SIM interface lines (preferably <10cm)
• EMC protection on audio input/output (filters against 900 MHz emissions),
refer to section 2.3.2 audio interface.
• Bias of the Microphone inputs, refer to section 2.3.2 audio interface.
• Ground plane : WAVECOM recommends to have a common ground plane
for analog / digital / RF grounds.
• Metallic case or plastic casing with conductive paint are recommended
Note
:
The module does not include any protection against overvoltage.
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