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Figure 5 Emission measurements using a near-field probe inside the cabinet, allowing identification of noisy coupling paths and relatively quiet areas.

The Tekbox TBCP5-150K400 RF Current Monitoring Probe is a highly effective tool for EMC measurements in high-power systems, particularly where conventional probes fall short.

Over the past year, we have been running our EMC training courses and gathering valuable feedback from delegates across a range of industries. Based on this experience, we have made an important update to our training structure to better support design engineers in developing practical EMC skills. Why We Made the Change Traditionally, we offered a 3-day EMC design course covering a wide range of topics. While comprehensive, we found that many engineers were looking for a more

In this article, I would like to share some observations on conducted emissions testing, focusing on practical pitfalls and lessons learned.

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.

Insertion loss is often treated as a simple datasheet value, but in real systems it strongly depends on source and load impedance. This article explains why off-the-shelf EMI filters can underperform—or even worsen EMC issues—when applied to variable speed drives and power converters.

Update (March 2026): Our March two-day course was a great success, and we would like to thank everyone for their strong support and participation. Due to high demand, our next course has already received several pre-bookings ahead of the official announcement. If you are interested in attending, please contact us or Telonic Instruments directly to secure your place, as availability is limited to 7 seats. Join the course now: https://telonic.co.uk/product/2-day-emc-troubleshoo

Min Zhang, PhD As future propulsion systems continue to push towards higher power, higher power density, higher efficiency, and reduced size, the industry has good reason to be excited about what lies ahead. The adoption of high-speed switching devices such as GaN and SiC is enabling products with significantly improved performance, efficiency, and functionality. However, beyond the PowerPoint pitches and technology roadmaps, engineers and engineering managers alike under

Rod Macpherson When using transient voltage suppressor (TVS) diodes for surge protection, particular care must be taken with PCB layout—especially the tracking between supply rails and the TVS device. For example, in systems with a 12 V rail and a separate 0 V reference (not chassis ground), a TVS diode may be placed between 12 V and 0 V to clamp surge events. In such cases, the routing to the TVS must not be implemented as a spur branching off the main power tracks. Spur con

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