For the electronic and electricical products, electromagnetic compatibility should be considered during the design stage, which can reduce the possibility of the EMC problem caused in the production stage to a lower degree. Whether it meets the requirement, it finally depends on the EMC inspection test of EMC conformance.
Due to EMC complexity, even for a comprehensive EMC design problem, there are some electromagnetic interference factors in the design process. This may finally cause the disqualification of the EMC testing. This situation is common to be seen.
Of cause, in order to solve the problem of disqualification, we can completely follow the normal EMC design idea and redesign the product based on the EMC design specification method and system method to solve electromagnetic compatibility hidden trouble from the source. This belong the EMC design category.
At present, the general situation of the domestic electronic and electrical products is as the following: when doing the EMC testing, the product design has been finalized, the product shell has been open, PCB board has been designed and produced, component interface card has been processes, even the product has been produced an was waiting for the shipment and release.
For the electro magnetic compatibility problem existed in this kind of product, we can only take the corresponding measure to solve the corresponding problems to meet the requirement of electro magnetic compatibility at the minimum changes. This belongs to the category of the emc corrective measures. This is also the question we need to discuss.
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