Most successful electronics companies have adopted a strategy for the testing of electromagnetic compatibility (EMC). A key part of any such strategy is testing of radiated and conducted emissions, both of which are subject to government regulation in most countries. To help ensure success during formal compliance testing by an accredited lab, a growing number of companies are revising their product development process to include pre-compliance testing of electromagnetic interference (EMI).

According to some test specialists, a product that hasn’t been through pre-compliance testing has about a 10-percent chance of passing compliance testing on the first try. With narrow or shrinking windows of opportunity in the marketplace, the delays caused by design changes and the expense of retesting can put a new product at a deep disadvantage in a highly competitive market.

In pre-compliance testing, a manufacturer’s in-house engineers perform preliminary assessments in accordance with the relevant standards. Although the measurements provide an approximation of expected EMI performance, they offer meaningful reassurance regarding the likelihood of successful compliance testing.

This paper introduces typical configurations for EMI pre-compliance radiated and conducted emission measurements, as well as EMI design troubleshooting. You can now start from here to set up your in-house EMI pre-compliance testing.

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