ANSI C63.4 and CISPR 22-harmony at last? [EMC test standards]

This paper compares the most prevalent emission measurement procedures used internationally-ANSI C63.4 and CISPR 22. In the past year, an amendment to CISPR 22 has been approved and published which contains much of the test setup and principles contained in ANSI C63.4. However, there are differences which may affect the test results. These differences are specifically addressed in this paper with the view of their significance in the measurement result, if any. The reader should be able to use this paper to prove that one test is possible to show conformance to the respective limits, provided the same option is selected from both standards.