Protective earth is mandatory for safety, but in many power electronic systems it forms the dominant return path for common-mode current, which can increase conducted emissions if not carefully managed.

In-house bench-top conducted emissions testing is a highly effective pre-compliance method for design engineers developing electronic products. Before sending a product to an accredited EMC lab, a proper conducted emissions test setup enables early detection of noise problems that can lead to test failures and design iterations. This article explains how to establish a bench-top conducted emissions test setup for mains-powered products, following CISPR 32 / CISPR 25-aligned p

When you buy coaxial cables from a trusted distributor, you typically review the datasheet, ensure the specifications meet your requirements, and place your order. But as a seasoned engineer, do you fully trust the cables without testing them first? Most engineers take a “trust but verify” approach, so in this blog, we’ll present a method for testing coaxial cables.   The equipment you’ll need:   A spectrum analyser; in this case, we used a Siglent SSA 3032X-R model. An RF cu

Introduction If your job involves electronics design, system development, electromagnetic interference (EMI) testing and troubleshooting, you might encounter the terms "noisy ground" and "clean ground." Technically, there is no such thing as "noisy or clean ground." However, these terms are commonly used in the engineering world despite their inaccuracies. They often give engineers the impression that the earth/ground is an infinite sink of electrical noise, disregarding the

A step-by-step guide to excellent engineering practice Bench-top EMC pre-compliance testing is often carried out under time pressure, yet the quality of the test report directly determines how effective troubleshooting will be Before committing to writing this article, I had two main thoughts: First, I’ve seen far too many subpar test reports from engineers. They often do excellent work but aren’t given enough time to document it properly. As a result, when teams sit down to

Conducted emissions testing on a bench-top setup is a valuable pre-compliance method that helps engineers assess and debug EMC performance before formal lab submissions. In automotive applications, this test setup follows the CISPR 25 standard, where the ground plane represents the vehicle chassis and requires direct LISN bonding to the test plane to achieve accurate results. Previously, we discussed how to set up a conducted emissions test for a consumer product. This requir