EMC Bench Notes

Harmonic comb generators are essential EMC lab tools that produce harmonically-related signals for chamber verification and troubleshooting. Learn why every test lab needs one, how to build a simple DIY version for under $50, and discover the best commercial options with unique features. From measuring cable resonances to portable chamber validation, these versatile devices belong in every EMC engineer's toolkit.

Field failures traced to ESD-induced USB hub damage in deployed POS terminals. Through systematic H-field probe analysis, we identified poor connector-to-chassis bonding as the root cause—a preventable design oversight with expensive retrofit implications.

ESD failures are increasing as products shrink and use lower voltages with smaller noise margins. Learn how to trace ESD current paths using H-field probes and oscilloscopes to quickly identify where discharge energy flows, enabling targeted fixes like bonding and shielding to solve immunity problems efficiently.

Three real-world case studies show how RF power amplifiers and creative benchtop setups solve complex radiated immunity failures in hours instead of weeks. From military-grade testing to runaway medical motors, discover techniques that save time and money while identifying root causes traditional methods miss.

Troubleshooting RF immunity failures at your workbench allows you to identify susceptibility issues in hours instead of weeks. These focused techniques pinpoint exact coupling mechanisms, saving thousands in test lab costs while providing more efficient solutions than traditional anechoic chamber testing.

Learn how to perform in-house conducted emissions testing for DC-powered devices like automotive and medical equipment, using simple test setups and filters to reduce electromagnetic noise across various frequency ranges.

Learn to set up in-house conducted emissions testing for line-operated products using basic equipment like spectrum analyzers and LISNs. This practical guide helps engineers perform pre-compliance EMC testing right on their benchtop, potentially saving time and money.

A revealing EMI analysis of the popular BeagleBone Black processor board uncovers concerning radiation levels and design flaws, suggesting potential challenges for industrial applications. The detailed investigation includes near-field scans, cable current measurements, and PCB design review.

This month's EMC Bench Notes reviews three affordable pre-compliance measurement software options that can simplify and automate the process of conducting in-house radiated emissions testing, saving time and costs compared to manual methods.

Discover pre-compliance testing for automotive and military EMC standards. Learn key differences from commercial testing, setup techniques, and tips for dealing with ambient signals. Save thousands in wasted compliance testing.