A new triple-output stepdown switching regulator IC, featuring three high-current outputs that are adjustable from 0.8 V to 5 V with a maximum current of 2 amps, has been introduced by Allegro Microsystems. Operating from an input voltage of 4.5 V to 34 V, the A4490 uses multiphase switching to reduce EMI and to minimize stress on the input capacitors by interleaving the … [Read more...]
Antenna Manufacturer Includes 60-Ft. Tapered Anechoic Chamber in New Test Facility
Dielectric Communications, a manufacturer of broadcast antenna systems has included new state-of-the-art test equipment in its new high-performance testing facility in Raymond, ME. With its new facility, company test personnel hope to expand their RF testing capabilities and to achieve full isolation of the variables that affect the performance of its antennas, filters, and … [Read more...]
EM Measurement Technology Firms Team to Create Global Presence
U.S. technology firm Orbit/RF Inc. and French technology firm SATIMO have entered into an agreement that will allow the firms to merge their technological efforts to serve a growing number of international customers. Both Orbit/RF and SATIMO provide antenna and electromagnetic measurement technology. SATIMO plans to use a "cross-fertilization" of SATIMO and Orbit/RF … [Read more...]
IEC Issues Three New EMC Standards on MV, HV, and EHV Power Supplies
The International Electrotechnical Commission (IEC) has issued three new standards on electromagnetic compatibility-specifically IEC 61000-3-6 Ed. 2.0; IEC 61000-3-7 Ed. 2.0; and IEC 61000-3-13 Ed. 1.0. All deal with the assessment of emission limits. The first 6100-3-6 is a technical report, informative in nature that provides guidance on principles that can be used as the … [Read more...]
EMI Test Software Targets Precompliance Testing
R&S®ES-SCAN EMI test software from Rohde & Schwarz has been crafted especially for precompliance and precertification EMI testing. Designed for use with R&S® ESPI test receivers, this package delivers a 32-bit application for testing in accordance with commercial standards. Its state-of-the-art MS Windows-style, straightforward user interface allows for quick … [Read more...]
Project IEC 61643-21 am1 Ed.1.0 Covers Performance & Test Methods for LV Surge Protectors
The International Electrotechnical Commission has published the draft of an amendment covering low voltage surge protection devices. The proposed change is titled "Amendment 1 - Low voltage surge protection devices - Performance requirements and testing methods."? This final draft has a voting period February 2, 2008 to April 11, 2008. Purchasers of this draft edition will … [Read more...]
FCC Issues Requirements for TCB Post-Market Surveillance
The Federal Communications Commission's Office of Engineering and Technology has issued KDB Publication 610077 detailing the requirements of telecommunications bodies (TCBs) to conduct post market surveillance of products they have certified. The document details a typical procedure that fulfills the requirements and addresses several issues that may arise in implementing a … [Read more...]
Access Homeland Security Standards Online
The Homeland Security Standards Data Base is powered online by the American National Standards Institute (ANSI). This site provides one-step access to standards critical to the jobs of first responders, code officials, and others charged with keeping the nation safe. A browsing feature lets readers access standards on threats, emergency preparedness and response, borders and … [Read more...]
Revision F of DO-160 Issued
DO-160F: Environmental Conditions & Test Procedures for Airborne Equipment was issued on December 6. 2007 and was prepared by RTCA Special Committee 135. This document provides standard procedures and environmental test criteria for testing airborne equipment for the entire spectrum of aircraft from light general aviation aircraft and helicopters through the "Jumbo Jets" … [Read more...]
On-site EMF Testing of an Emergency Network Communications Vehicle
Thorough testing requires taking measurements both inside and outside the vehicle. David A. Case, Jaime McLain and Murry Gavin Cisco Systems, Inc., Richland, Ohio, USA Experienced compliance test personnel are familiar with the usual spate of RF issues. Tasks range from performing MPE (maximum permissible exposure) studies and SAR (specific absorption rate) testing to … [Read more...]
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