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LANGER
DE-01728 Bannewitz
mail@langer-emv.de
EMV-Technik
www.langer-emv.com
3.5 Modification of the module
There are various starting points for modifying a module:
a) Modifying the module's geometry with regard to
- plug-and-socket connectors and cable connections
- the layout
- the surrounding metal system
b) Changing the circuitry by
- inserting damping resistors, filters
- changing the operating procedure
The RF sources have to be modified so that the field strength is reduced (damping) or the lines of
force are kept in the immediate vicinity of the source and do not exit the module.
Having detected the potential disturbing fields on the module, you will automatically have ideas and
possibilities on how to reduce these fields. Potential modifications are:
- Confining the magnetic fields through metal surfaces
- Shielding electric fields through GND areas
- Inserting damping resistors in signal lines
Perform another measurement with the HFW 21 to check the effect of the implemented
modifications. Evaluate the modification, take other measures if necessary and only carry out a
further acceptance measurement if there is a decisive improvement in the module.
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ESA1
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