ESC Con 2015

The EMC Blog

- January 31, 2014

Kenneth Wyatt is an independent consultant and specialist in electromagnetic compatibility (EMC) design, test and troubleshooting. In The EMC Blog, he discusses issues, trends, EMC design, and product troubleshooting techniques. One specialty is his use of do-it-yourself probes and use of low-cost test equipment and measurement techniques for evaluating EMI issues on the workbench. He's also the coauthor of The EMC Pocket Guide and coauthor for EMI Troubleshooting Cookbook for Product Designers, both published by SciTech Publishing and available on Amazon.


Wi-Fi network interference, analysis, and optimization

  • 02.15.2015

One aspect related to EMC today is that, with the proliferation of embedded wireless systems in all imaginable products, comes the risk of increasing interference and resulting slowdown in data transfer. We'll discuss how wireless networks work, the typical interfering sources and how best to manage your system.Read More...


EMC questions answered (part 6)

  • 01.16.2015

Several questions on EMC measurements and product design were asked during my recent webinar on troubleshooting EMI problems. Unfortunately, we ran out of time to answer them all, so here they are with answers.Read More...


High-powered radiated immunity pre-compliance testing on your workbench

  • 01.10.2015

There may be occasions when it’s desirable to perform radiated immunity pre-compliance testing to levels higher than the near field probing methods I’ve described in an earlier blog posting. This posting shows how you may achieve up to 50 V/m on your bench top.Read More...

Review: Spectrum and Network Measurements (2nd Edition)

  • 12.22.2014

Spectrum and Network Measurements, by Robert Witte, is destined to become a classic work on the subject. If you are a new RF or EMI engineer, or are a product designer incorporating wireless into your designs, and you’re not quite sure how to use or optimally set up a spectrum or network analyzer, then this is the book for you!Read More...

Review: Tektronix RSA306 spectrum analyzer (part 2)

  • 12.16.2014

In part 2 of this review, we’ll cover some of the more advanced features and measurements.Read More...


Review: Tektronix RSA306 spectrum analyzer (part 1)

  • 12.01.2014

The spectrum analyzer has always been a vital tool for the EMC engineer. Until the last few years, these instruments have been rather large and heavy desktop instruments, weighing up to 60 pounds, or more. With the breakthroughs in components used for wireless technology, the size and weight of these instruments has decreased dramatically. In this review, we'll check out the new Tektronix RSA306 spectrum analyzer and run it through its paces.Read More...

Using a differential probe to troubleshoot EMI

  • 11.07.2014

One other tool you may want to consider when troubleshooting and EMI issue is a high frequency differential probe. We’ll use the Rohde & Schwarz RT-ZD10 1 GHz bandwidth probe, but similar probes from other manufacturers should work equally well.Read More...

Review: Rohde & Schwarz HZ-15 near field probes

  • 10.20.2014

One of my most used EMI tools is a good set of near field probes. These may be used to quickly identify potential sources of radiated or conducted emissions and are designed to respond to either E-fields or H-fields. Many companies sell probe kits and I’d like to review the HZ-15 kit from Rhode and Schwarz, as being above average.Read More...

Case study: radiated interference to industrial controller

  • 10.09.2014

As an EMC consultant, I seem to be running into more and more issues with ESD and radiated susceptibility. I believe this is due to the fact noise margins are gradually being reduced as supply voltages move from 5 to 3.3 to 1.8 to 1.2 volts. In addition, products are scaling down in size, and quite frankly, designers still don’t understand basic EMC design principles.Read More...


A visit to ARRL headquarters

  • 09.22.2014

I had a chance to visit the American Radio Relay League (ARRL) headquarters in Newington, CT. The ARRL is the national organization of radio amateurs in the U.S., and provides training, resources and representation of radio amateurs in Washington, D.C.Read More...


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