EMC recommendations
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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged
without prior written agreement.
WM_PRJ_Q24NG_PTS_002-001 June
2006
7 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 3.2.6 SIM interface.
•
Length of the SIM interface lines (preferably <10cm)
•
EMC protection on audio input/output (filters against 900 MHz
emissions), refer to section 3.3.2 audio interface.
•
Bias of the Microphone inputs, refer to section 3.3.2 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
Warning:
The Q24NG does not include any protection against over voltage.
