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Latest updates and articles.

EMC troubleshooting with a portable near-field kit

A near-field probe can find the clock harmonic behind an emissions failure in minutes, but poor probe choice and inconsistent positioning can just as easily sen…

What a notified body or test lab may ask for

A sound EMC result can become difficult to defend if nobody can establish which product variant was tested, how its cables were arranged or what software was ru…

Immunity testing support equipment: what you need and why

An immunity generator is only one part of the test system. The wrong coupling device, amplifier, cable or monitoring arrangement can invalidate an otherwise wel…

EMC compliance mistakes that delay UK launches

A product can pass several EMC tests and still be unready for launch. The usual cause is not a single noisy component, but a chain of decisions involving the wr…

How to reduce noise from fast digital clocks

A 25 MHz clock rarely creates only a 25 MHz EMC problem. Fast edge rates can produce measurable harmonics hundreds of megahertz above the fundamental, with the…

Why shielding can reduce one peak and create another

A shield does not remove electromagnetic energy. It changes where the energy flows, resonates and escapes, which is why suppressing one peak can expose or creat…

How to find cable-borne noise in rail systems

A noisy rail harness can appear to implicate every connected subsystem. In practice, one converter edge, bonding defect or cable-screen termination may be drivi…

Medical device radiated immunity planning

A medical device can remain powered throughout a radiated immunity test and still fail. The harder question is whether RF exposure caused an unacceptable clinic…

How to build an EMC technical file

An EMC test report can show what happened to one sample on one day. An EMC technical file must explain why that evidence supports the compliance claim for every…

How to interpret radiated susceptibility failures

A radiated susceptibility failure is rarely explained by frequency alone. The type of upset, recovery behaviour, antenna polarisation, EUT orientation and test…

How to debug intermittent symptoms during medical EMC tests

A medical device that resets once during a three-minute RF dwell is harder to diagnose than one that fails continuously. The disturbance may last milliseconds,…

GTEM cells for radiated emissions: when they make sense

A GTEM cell can expose an emissions problem within minutes, but only if the EUT, cabling and measurement method fit the cell. Put an electrically large or poorl…

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