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EMC Design/Troubleshooting: Radiated Emissions Fundamentals and Pre-Compliance Testing Pt.2 [2017 Webinar Recording]

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Radiated Emissions Fundamentals and Pre-Compliance Testing (Part 2, 1.5 hours)

Presented by Ken Wyatt

Picking up where we left off in Part 1, the discussion continues with current probes and why they are so important to help diagnose radiated emissions. We’ll show you how to build your own current probes and how to use simple antennas for measuring and troubleshooting emissions. We’ll discuss a simple three-step process for analyzing the source – path – antenna structure that may be causing your product to fail. Finally, we’ll show you how to set up a radiated emissions pre-compliance range at your own facility, along with several selected EMI troubleshooting techniques to help analyze radiated.

PCB Webinars Presented by Ken Wyatt

Kenneth Wyatt is president and principal consultant of Wyatt Technical Services LLC, as well as the senior technical editor for Interference Technology Magazine. He has worked in the field of EMC engineering for over 30 years with a specialty in EMI troubleshooting and pre-compliance testing. He is a co-author of the popular EMC Pocket Guide and RFI Radio Frequency Interference Pocket Guide. He also coauthored the book with Patrick André, EMI Troubleshooting Cookbook for Product Designers, with forward by Henry Ott. He is widely published and authored The EMC Blog hosted by EDN.com for nearly three years. Kenneth is a senior member of the IEEE and a longtime member of the EMC Society. 


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Included Modules

EMC Design/Troubleshooting: Radiated Emissions Fundamentals and Pre-Compliance Testing Pt.2 [2017 Webinar Recording] (module)

 

This Course is from a multi-part series. Below is a description of the complete series. Each of the following parts/sessions can be purchased separately at http://wll.coggno.com/shop:

Introduction to EMC, EMI, and Troubleshooting Philosophy (45 minutes)

Presented by Ken Wyatt

We’ll explore some of the basics of EMC, the difference between EMC and EMI, EMC standards, and a systematic approach to resolving EMI issues with products, including the source – path – receptor (victim) model, the four possible coupling paths, and how to organize the information to solve EMI issues quickly.

Important EMI Product Design Concepts (1 hour)

Presented by Ken Wyatt

This module will concentrate more on the fundamentals of EMC and how it applies to product design. We’ll discuss how energy from digital signals move through PC boards, why discontinuous return paths are so bad, differential- versus common-mode currents, coupling paths, proper cable shield termination and pigtails, shielding tips, and hidden antenna-like structures. We’ll follow this with some interesting case studies. 

Radiated Emissions Fundamentals and Pre-Compliance Testing (Part 1, 1 hour)

Presented by Ken Wyatt

We’ll continue with the importance of wavelength, differential mode emissions versus common mode emissions, why high-speed digital signals can cause emissions, analysis of clock harmonics, and measuring emissions. We’ll describe how to start assembling your own EMI troubleshooting kit, along with acquiring low cost spectrum analyzers and probing tools. We’ll show you how to construct your own near field probes and how to use them to identify energy sources and potential coupling paths. 

Radiated Emissions Fundamentals and Pre-Compliance Testing (Part 2, 1.5 hours)

Presented by Ken Wyatt

Picking up where we left off in Part 1, the discussion continues with current probes and why they are so important to help diagnose radiated emissions. We’ll show you how to build your own current probes and how to use simple antennas for measuring and troubleshooting emissions. We’ll discuss a simple three-step process for analyzing the source – path – antenna structure that may be causing your product to fail. Finally, we’ll show you how to set up a radiated emissions pre-compliance range at your own facility, along with several selected EMI troubleshooting techniques to help analyze radiated.

Workbench Immunity Testing and Troubleshooting (1 hour)

Presented by Ken Wyatt

We’ll concentrate on radiated immunity, as that is by far the most common of all the immunity issues. Several low-cost broadband and narrow band RF sources will be shown, including low cost walkie-talkies and small pocket-sized frequency synthesizers that have proven themselves as valuable troubleshooting tools. We’ll also briefly cover conducted immunity, electrically fast transient (EFT), and surge testing that can be done in-house. We’ll finish this segment up with the use of low cost TEM cells for both radiated emissions and radiated immunity troubleshooting.

Electrostatic Discharge (ESD) Testing and Troubleshooting (1 hour)

Presented by Ken Wyatt

In this final module we’ll cover ESD testing and troubleshooting. We’ll start off with some basic testing techniques, discuss product design aspects to help control the path of ESD current, show you several low-cost tools to help in the troubleshooting process. We’ll show you how to construct your own ESD detector and follow up with several case studies of some difficult ESD problems. 

Integration of Control Measures

Presented by Steven Ferguson

This session makes use of the design and troubleshooting tutorials presented during this series and adds discussion of implementation. Topics include:

  • Shielding materials and effectiveness along with controlling shield leakage (ventilation, holes, clamshells, and various openings)
  • Component variances and the hidden schematic
  • Gasket implementation for effective treatment of slots and seams
  • Wiring and cable management to avoid filter bypassing and controlling the loop area
  • Filter pin connectors for low speed and high speed signal lines.
  • Transient control – pros and cons of various device types
  • Developing the EMC Control Plan to provide the overall approach for the entire design team and to bring test and production into the product development and manufacturing phase of the product life cycle

Ken Wyatt

Kenneth Wyatt is president and principal consultant of Wyatt Technical Services LLC, as well as the senior technical editor for Interference Technology Magazine. He has worked in the field of EMC engineering for over 30 years with a specialty in EMI troubleshooting and pre-compliance testing. He is a co-author of the popular EMC Pocket Guide and RFI Radio Frequency Interference Pocket Guide. He also coauthored the book with Patrick André, EMI Troubleshooting Cookbook for Product Designers, with forward by Henry Ott. He is widely published and authored The EMC Blog hosted by EDN.com for nearly three years. Kenneth is a senior member of the IEEE and a longtime member of the EMC Society. 

Steven Ferguson 

Steven Ferguson is Executive V.P. at Washington Laboratories, Ltd (WLL) and has been working in EMC, Safety, MIL-STD, Nuclear, Energy and related compliance engineering and test for over 35 years at test laboratories and manufacturers. His work includes designing products, developing procedures, performing tests and advising developers on routes and techniques for attaining product compliance. He has been directly involved with EMC design and compliance evaluation for many systems including several power plants (facilities and equipment qualification), hospitals, presidential aircraft, the Space Shuttle and Hubble Space Telescope. He presents various courses on EMI/EMC compliance including EMC for Nuclear Power Facilities, Architectural Shielding and a hands-on course MIL-STD-461 testing at the WLL facility in Maryland and on-site for multiple government and industrial clients. His work also includes EMC, Environmental and Safety evaluations for commercial, military and medical devices and training of hundreds of personnel on test and evaluation techniques. He has authored several papers on equipment qualification and evaluation techniques with presentations at many conferences. He is a member of the TR-102323 Working Group and supported preparation of Revision 4.

 

About WL Academy, the Electronics Industry's learning resource:
From EMC to Product Safety, from Radio Frequency to Compliance and Environmental Design, we can help manufacturers get the compliance training your design and testing engineers and technicians need. The WL Academy specializes in comprehensive webinars, seminars and workshops that combine practical real-world engineering insights and solutions for today's engineering challenges. Taught by experienced engineers, WL Academy Seminars feature two to five day courses in compliance design, engineering, testing and measurement subjects. WL Academy's free workshops provide snapshot training days for current design and testing challenges. We also feature ancillary courses from nationally recognized partners in the electronics testing industry. Let us help your company ease your journey to product compliance.

WL Academy Engineering Courses:
The WL Academy has a slate of national training courses geared to meeting the demands of today's progressive electronics designs and the needs of the professional engineers who must bring them to market on time and on budget. From the complex military systems to the state of the art ITE, from crucial medical and ever-changing wireless, from unique RF to telecommunications equipment our training suite of courses will help these industry engineers gain the practical training they need in an easy to learn environment. WL Academy instructors are engineers themselves in challenging, fast-paced manufacturing and service industries - they get it. http://wll.com/us/academy/



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