Have the new standards improved measurement accuracy? Ken Hall Hewlett Packard, Roseville, CA, USA This article presents the results of an inter-laboratory comparison of a flicker measurement system. In the process of evaluating replacement equipment that met the new international requirements of IEC 61000-3-2,1 harmonics, and IEC 61000-3-3,2 voltage fluctuations commonly … [Read more...]
Developments in Lightning Testing Standards for Aircraft Avionics
Test standards are running behind the fast pace of technological change. Nicholas Wright EMC-Partner, Laufen, Switzerland INTRODUCTION Escalating costs and increasing complexity in modern aircraft has ensured that aircraft design and assembly is now a global phenomena. Today, subsystems can be designed, manufactured, and tested at any location around the world, then … [Read more...]
EMC Management and Design in Military and Aerospace Systems—Avoiding the Pitfalls
A systematic approach to EMC engineering and management is the best way of achieving compliance. A.S. De Beer, Ph.D Ruphus Technologies (Pty) Ltd., Lonehill, South Africa ABSTRACT This article focuses on the necessity of following a systematic engineering approach in the design and testing of military and aerospace systems that must comply with stringent EMC Standards. It … [Read more...]
EMC Pre-testing Simplifies NEBS Compliance
Introduction NEBS was developed by Bell Labs in the 1970s to standardize equipment that would eventually be installed in a phone company's central office (CO). Sorting out the acronyms, NEBS stands for "Network Equipment-Building System," a term used to describe the environment of a typical Regional Bell Operating Company (RBOC). To get a basic understanding of NEBS, visit … [Read more...]
Developments in Lightning Test Standards for Aircraft Avionics
Test standards are running behind the fast pace of technological change Nicholas Wright, EMC-Partner Laufen, Switzerland Introduction Escalating costs and increasing complexity in modern aircraft have ensured that aircraft design and assembly is now a global phenomena. Today, subsystems can be designed, manufactured, and tested at any location around the world, then shipped to … [Read more...]
Powerline Filter Cancels Surges
Series-mode filters contain residual surge voltage within normal power line voltage ranges while avoiding the inconvenience and costs of downtime J. RUDY HARFORD, Zero Surge Inc. WITHIN THE MODERN home and workplace, an ever-growing number of sensitive electronic systems are vulnerable to power line surges that can disrupt or damage vital equipment. Obviously, a filter that … [Read more...]
Cancer Institute Issues Advice Re EM Exposure
In a follow-up to a story that the eNews carried last summer, Dr. Ronald Herberman of the University of Pittsburgh Cancer Institute has listed ten important precautionary steps for limiting an individual’s exposure to electromagnetic radiation from cell phone use. According to the Institute’s website, these recommendations have been reviewed by Pitt experts in neuro-oncology, … [Read more...]
Input Power – It’s More Than Just a Line Cord
The power distribution and control function has matured into a full-fledged design discipline. Roger Edelson Edelson Associates, Los Angeles, CA, USA Power distribution and control (and the associated cable management function), while not a sexy topic, has grown into a recognizable, and important, subset of industrial equipment design. Power distribution and control … [Read more...]
Impedance Termination of Cable Shields to Reduce EMI Coupling
Surge damage as a result of long cables connected to low voltage data systems can be prevented RICHARD MEININGER & ROBERT BLOUCH This article proposes a solution to the problems encountered when long cables are used to connect low voltage data systems, and either data interference or lightning surge damage is encountered. Three separate interference regimes are addressed: … [Read more...]
EMI Filters for Cardiac Pacemakers and Implantable Defibrillators
The use of ceramic feed-through capacitors, as well as specific filter designs and installation techniques, can make cardiac pacemakers immune to EMI ROBERT A. STEVENSON, Maxwell Technologies Carson City, Nevada, USA Under the coordination of Wireless Technology Research, L.L.C. (WTR), the interaction between cellular phones and cardiac pacemakers has been widely … [Read more...]
