Overview: Failures during EMC product qualification testing can result in expensive delays and possible redesign. Understanding simple EMC design basics go a long way towards minimizing these risks. This webinar will review the most common design issues and demonstrate simple troubleshooting techniques to identify issues early in the design process. What You Will Learn: - … [Read more...]
View Our Webinar, Cost-Effective Use of Close-Field Probing Part I
This webinar – number 1 in a series of 2 – describes simple, low-cost, cost-effective, qualitative EMC bench-testing techniques for emissions and immunity, using close-field probes (that many people make themselves) and low-cost portable measuring instruments. These practical techniques can be used in every stage of a product’s life cycle, from proof-of-principle to … [Read more...]
Webinar Questions & Answers
Editor’s note: This question was asked in response to Interference Technology’s recent webinar by Keith Armstrong. To view the webinar, click here. Q1. What did it take to fix the supercomputer immunity? A1. Can’t remember now, long time ago (22 years or so). Did I say immunity? I think it was actually emissions. But I do remember that it wasn’t very difficult, really, just … [Read more...]
View Our Latest Webinar and Q&A Session: Understanding EMC Basics 3
On August 28, 2013, Keith Armstrong presented a live webinar on “Basics: Grounding, Immunity, Overviews of Emissions and Immunity, and Crosstalk.” This webinar – number 3 in a series of 3 – describes a simple, easy non-mathematical engineering understanding of the physical underpinning of electromagnetics. Watch the first and second webinar in this series here. This … [Read more...]
How do we identify which is the dominant: E-factor or H-factor?
Editor’s note: This question was asked in response to Interference Technology’s recent webinar by Keith Armstrong. To view the webinar, click here. Question: How do we identify which is the dominant: E-factor or H-factor? Answer: In any circuit, if we measure the voltage of the noise it has picked up from its electromagnetic environment, we can then load the circuit with a low … [Read more...]
IEC 60204-31 ed4.0: Safety of Machinery – Electrical Equipment of Machines – Part 31
IEC 60204-31 ed4.0: Safety of Machinery - Electrical Equipment of Machines - Part 31: Particular safety and EMC requirements for sewing machines, units and systems From the International Electrotechnical Commission webstore: "IEC 60204-31:2013 applies to electrical and electronic equipment, sewing machines, units and systems designed specifically for professional use in the … [Read more...]
What are Best Practices for Qualification of Homemade Antennae to 'Calibrate' Pre-Compliance Measurements?
Editor’s note: This question was asked in response to Interference Technology’s recent webinar by Keith Armstrong. To view the webinar, click here. Question: What are best practices for qualification of homemade antennae to 'calibrate' pre-compliance measurements? Answer: Apart from ‘sniffer’ probe antennas, I have always used antennas that I have purchased, complete with … [Read more...]
2005 EMC Directory & Design Guide
The 2005 Interference Technology EMC Directory & Design Guide includes technical articles, information on professional societies, a directory of government personnel involved in EMI/EMC, a recap of standards published and the EMC Buyers’ Guide, which includes a Products & Services Index and Company Directory. Click here to view the issue. … [Read more...]
If the Mains Lead Positive and Negative are Balanced to 'Ground,' Does this Reduce CM Noise?
Editor’s note: This question was asked in response to Interference Technology’s recent webinar by Keith Armstrong. To view the webinar, click here. Question: If the mains lead positive and negative are balanced to 'ground' does this reduce CM noise? I assume ‘positive’ and ‘negative’ mean live and neutral, or Phase 1 and Phase 2 in the case that the neutral is a centre-tap in … [Read more...]
Metal Planes – How Does Metal Material Affect E and H Shielding as a Function of Frequency? Is Iron Best Shield?
Editor’s note: This question was asked in response to Interference Technology’s recent webinar by Keith Armstrong. To view the webinar, click here. Question: You talked of metal planes. How does the metal material affect E and H shielding as a function of frequency? 50 and 60 Hz are problem areas. Is iron the best shield for that frequency? Answer: Yes, the type of metal can … [Read more...]
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