Erik J. Borgstrom, Environ Laboratories LLC, Bloomington, Minnesota, US OVERVIEW RTCA/DO-160G, Environmental Conditions and Test Procedures for Airborne Equipment, prepared by RTCA Special Committee 135, was issued on December 8, 2010, superseding the previous version, DO-160F [1]. DO-160G covers standard procedures and environmental test criteria for testing airborne … [Read more...]
Report: EMI a Long-Term Risk in Implantable Cardioverter Defibrillators
Electromagnetic interference could play a role in the long-term risks of having an implantable cardioverter-defibrillator (ICD), according to a recently published AccessMedicine report from McGraw-Hill. While the long-term risks, including lead- or device-related malfunction, infection, and inappropriate shock, are felt to be low when compared to the benefits of a life-saving … [Read more...]
The Effects of the New ESD Standard on ESD Simulators
Bruno Straumann, Senior Development Engineer,Haefely Test AG Basel, Switzerland. INTRODUCTION The new IEC 61000-4-2 Edition 2 standard, which replaces IEC 61000-4-2 Edition 1 1995, was initially announced in December 2008. Based on the revised IEC standard, the identical European standard EN 61000-4-2:2009 was also released. The new EN standard can already be applied for ESD … [Read more...]
HEMP Filter Design To Meet MIL -STD-188-125 PCI Test Requirements
ABSTRACT Philosophies for the best method of HEMP protection have been around for a long time. MIL-STD-188-125 -1 and -2 are more recent specifications for defining requirements for HEMP protection. They specify PCI (pulse current injection) testing techniques to demonstrate the integrity of the protection system, but require specialist test equipment capable of injecting high … [Read more...]
EMC at IC Level – Part 1: Pulse Immunity of ICs in Different Packages
Note: The below article has been translated from German and can be found in its original language in the 2011 EMC Europe Guide. Part 2 of this article can be found here. Sven König, Langer EMV-Technik GmbH, Bannewitz, Germany INTRODUCTION Nowadays, micro-controllers are omnipresent. Whether in MP3 players, mobile phones, washing machines or cars, the small controllers … [Read more...]
Holding Steady
As the economy gained momentum in late 2009 and early 2010, engineering organizations, like every other business sector, sensed promise that a strong, self-sustaining recovery was kicking in. However, as government spending to stimulate the economy trailed off and businesses concentrated on rebuilding their inventories, the growth rated started to slow – a pattern that … [Read more...]
System Compatibility: An Essential Ingredient for Achieving Electromagnetic Compatibility and Power Quality for Lighting Control Systems
Philip Keebler, Kermit Phipps, Frank Sharp, EPRI Lighting Laboratory For years, lighting systems have been operating as stand-alone loads without the use of sophisticated lighting controls for energy savings in all types of facilities—residential, commercial, and industrial. Utilities and end users viewed lighting controls in the past as, luxury, systems that were used only … [Read more...]
Differential Transfer Impedance of Shielded Twisted Pairs
Michel Mardiguian, EMC Consultant, Saint-Rémy-lès-Chevreuse, France The concept of Shield Transfer Impedance (Zt), introduced by S. Schelkunoff in 1934, is a very convenient parameter for the prediction and control of EMI coupling through cable shields. Although widely applied to coaxial cables against EMI susceptibility problems, the Zt parameter can be easily extended to … [Read more...]
Understanding the Changes to FCC 5 GHz Part 15.407 Regulations
David A. Case, Cisco Systems, Richfield, OH In July of 2003, the International Telecommunications Union – Radio adopted Recommendation 229, allocating the 5150-5350 MHz and 5470-5725 MHz bands to mobile service, including RLAN systems.* The following year the FCC updated its Part 15.407 regulations to include the 5470-5725 MHz band, as well as require changes for devices that … [Read more...]
How Smaller Form Factors Exacerbate ESD Risks and How Foil Resistors Can Help
Yuval Hernik, Vishay Precision Group, Malvern, PA For most of us, electrostatic discharge (ESD) and static electricity are little more than the shocks received when touching a metal doorknob after walking along a carpeted floor, or when opening a car door. The level of the voltage produced depends on a number of factors, such as the affinity of the two bodies and the air … [Read more...]
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