Automotive transient protection design tips
A protection circuit can survive the headline transient voltage and still fail because the TVS diode overheats, the return path lifts or the downstream regulato…
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Articles
Latest updates and articles.
How to write an EMC lessons-learned review
An EMC failure report tells you what failed. A useful EMC lessons-learned review explains why the project allowed the failure to reach the test laboratory. That…
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Why cable length changes your emissions result
A cable that is electrically quiet at one length can become an efficient radiator after adding half a metre. The electronics may be unchanged, yet the emissions…
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Radiated emissions troubleshooting from a noisy display module
A display can pass every functional test yet turn its interface cable, power loom and enclosure seams into an efficient antenna.This radiated emissions case stu…
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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…
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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…
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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…
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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…
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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…
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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…
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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…
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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.…
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