How to improve the medical device emc electromagnetic harassment

If the product radiation harassment is easy to exceed the standard, rectification is unavoidable, we must be responsible for the rectification of engineers; such as rectification engineers to master the basics of radio, understand the concept of radiation harassment, can read and understand the circuit and radiation harassment test charts, both electronic design experience or EMC industry experience, it will be easy to form a set of problem-solving approach.

Radiation harassment rectification of the general requirements: for the batch of products, semi-finished products or finished products have been a complete set of materials, circuit boards can not be changed layout, low cost, to be able to improve or produce batch; rectification measures for the next batch or similar product design has a guiding significance.

Implementation of the rectification, usually to prepare two samples, manuals, circuit diagrams, structural drawings of each; it is best to have a skilled worker to assist in the operation of the 186.209.083.48 Zhang

Re F rectification methods: First, a preliminary understanding of the characteristics of the product, as much as possible to learn about the current product radiation nuisance exceeded the standards of the specific situation; second, the rectification of the requirements for the understanding of the product Circuit principle, according to the information provided by the customer to determine what type of exceeds the standard (work required to oscillate signal harmonics exceeds the standard or other issues) and possible sources of nuisance; again, combined with circuit analysis, through the internal inspection of the product and the near-field probe probe, to specifically determine the source of radiation nuisance and the main path of radiation emission; in order to ensure that the start correct, to arrange for necessary troubleshooting tests for the further confirmation of the crux of the problem; The fourth step, comprehensive analysis of the results, take measures to rectify; if the standard is exceeded seriously (more than 6dB), it must be managed from the source (exceeding the standard of more than 12dB often have to take other measures at the same time); if the standard is not serious (not more than 6dB), you can start directly from the easier to deal with the main problem (may be the source of the nuisance may be propagation pathways); the fifth step, to verify the effectiveness of rectification ; sixth step, the effect is not ideal to return to the check, the effect is good, you can consider the program to simplify and consolidate the validation, in order to find out the most convenient and economical way to meet the standard; seventh step, make a note, a summary of the experience.