Simple square wire loops may be well suited for injecting signals into circuit boards by inductive coupling. Douglas C. Smith, D.C. Smith Consultants, Los Gatos, CA CONSTRUCTION DETAILS Square magnetic loops are very useful troubleshooting tools. This article will describe the construction and characteristics of shielded magnetic loops and compare them to unshielded magnetic … [Read more...]
The IET’s Guide on EMC for Functional Safety
When correctly applied, real financial savings can be expected, along with a significant reduction in financial risks. Keith Armstrong, Cherry Clough Consultants, Stafford, UK Electronic complexity is increasing with no end in sight, increasing self-generated noise levels, while the feature sizes in silicon integrated circuits continue to shrink, making them emit more noise … [Read more...]
In-situ EMC Testing Using Surface Current Sense Wires
Mart Coenen, EMCMCC bv, Eindhoven, the Netherlands Tim Maas, ASML bv, Veldhoven, the Netherlands Yili Hu, Student Eindhoven University of Technology, the Netherlands Arthur van Roermund, Eindhoven University of Technology, the Netherlands ABSTRACT In-situ EMC testing is, for large fixed systems and installations within the scope of the European EMC Directive, not a primary … [Read more...]
Choosing the Right Chamber for Your Test Requirements
Martin Wiles, Vince Rodriguez, ETS-Lindgren Developments within standards community has led to new chamber validation procedures above 1 GHz and alternative test methods using FARs. INTRODUCTION Anechoic chambers are used today for performing EMC measurements according to a variety of published EMC standards. There are many different fields of application, including … [Read more...]
Test Group Expands Business with Acquisition
EM TEST Group continues its growth strategy with the recent acquisition of Lüthi Elektronik-Feinmechanik AG, a Frenkendorf, Switzerland-based manufacturer of coupling/decoupling networks for conducted immunity testing and emission measurement as well as of EMC measuring clamps and accessories. With this acquisition, Lüthi AG becomes a part of the EM TEST Group of companies; … [Read more...]
Instrumentation Amplifier Debuts with On-Chip Diagnostics
National Semiconductor Corp. recently unveiled a zero-drift, programmable instrumentation amplifier with on-chip diagnostics. The LMP8358 is equipped with electromagnetic interference suppression filters to reduce unwanted radio frequency interference from external sources, such as cell phones or nearby antennas. Additional filtering can be added with one external … [Read more...]
Pulse Probe Approved For FORD-EMC-CS-2009 Specification
AR/RF Microwave Instrumentation has the distinction of having the only commercially availablepulsed E-field probe that is approved by name in the new FORD-EMC-CS-2009 specification. The new specification, which addresses the pulse e-field probe method calibration for ALSE method bands 6 & 7, singles outAR Model PL7004 (800 MHz – 3.6 GHz / 80 – 800 V/m)as the only commercial … [Read more...]
Electromagnetic Noise from 10 Hz to 40 GHz Covered in Revised Standard
A major revision is now available for IEEE C63.2™, "American National Standard for Electromagnetic Noise and Field Strength Instrumentation, 10 Hz to 40 GHz Specifications." The standard provides electromagnetic compatibility techniques and requirements for instruments measuring quasi-peak, peak, rms, and average values for electrical and electronic equipment for various … [Read more...]
IEC 61000-4-7 Ed. 2.1: Updated Standard for Harmonics Measurements
Testing and measurement techniques - General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto.IEC 61000-4-7:2002+A1:2008 applies to instrumentation intended for measuring spectral components in the frequency range up to 9 kHz which are superimposed on the fundamental of the power supply systems at … [Read more...]
3-Channel Power Meter Covers 10kHz – 40 GHz Range
AR RF/Microwave Instrumentation’s new Model PM2003 3-channel power meter delivers 200 readings per second with one channel; and 100 readings per second when two channels are used. Two channels at a time can be simultaneously displayed and recorded; the third channel can be easily switched in to be displayed or recorded. Its dynamic range extends to 90dB when diode power heads … [Read more...]
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