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Automate EMC measurement

Posted: 02 Jan 2008 ?? ?Print Version ?Bookmark and Share

Keywords:automated EMC measurement? EMI test system? CISPR16-2? IF bandwidth?

Automated EMC measurement performed with suitable test and control methods can improve efficiency in the laboratory and eliminate the time spent in making repeated EMI measurements.

An integrated test system helps prevent errors caused by manually reading and recording results, and the software ensures the conformance of the instrument settings, enabling the production of highly repeatable test results. There is no difference between the accuracy of emission values measured manually and measured under software control. In both cases, the measurement uncertainty is based on the accuracy specifications of the equipment used for the test.

However, differences in the settings of instruments controlled by software may lead to varying test results. This is solved by using automated EMI measurement standards, specifically the IEC CISPR16-2 standard. There are also correction factors and automatic monitoring functions built into test systems to ensure the validity of the test results.

Chen Feng of Rohde & Schwarz China describes in this article how to establish an automated EMI test system, with an emphasis on problems encountered, solutions used and how to configure the system and parameters correctly. It also stresses the importance of normalization of the system in order to avoid differences between test results from the laboratory and from operations.

View the PDF document for more information.




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