Articles

Latest updates and articles.

What makes an EMC lab suitable for pre-compliance work

A quiet chamber and an expensive receiver do not automatically make a useful EMC pre-compliance lab. If the layout, operating mode or cable configuration cannot…

Shielding effectiveness testing for equipment enclosures

A cabinet can look electrically continuous and still leak badly through a display aperture, door seam or filtered cable entry. Shielding effectiveness testing f…

How to specify a turnkey EMC test system

A turnkey EMC test system can be fully operational yet still be wrong for the product, ports, frequency range or evidence you need.The specification must define…

Why industrial systems need both emissions and immunity checks

An industrial controller can produce a clean emissions plot and still reset whenever a nearby contactor opens. Emissions and immunity examine opposite sides of…

MIL-STD-461 emissions vs susceptibility: what to expect

A unit can pass every emissions test and still fail susceptibility within minutes. The two test families examine different coupling mechanisms, failure modes an…

Medical device EMC basics for UK manufacturers

A medical device can pass a familiar immunity test level and still present an unacceptable clinical risk. The missing link is often not another test, but a defe…

How to compare radiated emissions pre-scan results fairly

A 6 dB improvement on a radiated emissions pre-scan is meaningless if the cable position, detector, antenna geometry or equipment operating mode changed between…

How to choose between a chamber and a pre-compliance rig

A compact rig can reveal an EMC problem in minutes, but it can also conceal one if the coupling path, ambient environment or test geometry is poorly controlled.…

EMC troubleshooting for mixed-signal boards

A mixed-signal board can pass every functional test yet fail EMC because the same clock edge corrupting an ADC reading is also driving common-mode current onto…

Radiated emissions and clock spread spectrum

A spread-spectrum clock can lower the highest point on an emissions plot without reducing the total RF energy leaving the product. That distinction explains bot…

How to choose EMC equipment by frequency range

An instrument covering the stated frequency is not necessarily suitable for the test. Transducer factors, power output, detector behaviour and coupling method o…

EFT vs surge vs ESD: what each test finds

An EUT can fail EFT, surge and ESD at the same external connector, yet each failure may come from a different coupling path and require a completely different d…

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