Ofcom, the United Kingdom’s telecom regulator, has issued a notice on the dangers of pirate radio and the ongoing enforcement challenges this illegal activity presents. The Ofcom statement pointed out that illegal broadcasts endanger both first responders and ordinary citizens when air traffic control and ambulance, fire, and police radio communications are unavailable because … [Read more...]
Certification Programs: What’s Behind the Terminology?
A well-defined and structured certification program is vital to assuring product quality and safety Randy Ivans, Underwriters Laboratories Inc. Melville, NY The Merriam-Webster® Dictionary defines “certify” as “to attest authoritatively, to confirm, to present in a formal communication, or to attest as being true.” Consider the implications of these words and phrases—confirm, … [Read more...]
Achieving More Accurate Measurement of Conducted RF Emissions Using Modified AMNs
Measurement uncertainty for common-mode disturbances can be reduced from about 22 dB to a maximum of a few dB Mart Coenen, Philips Applied Technologies Eindhoven, the Netherlands Introduction In early 1980, extensive discussions were held within the IEC CISPR/A working group regarding the definition of the impedance characteristics and the RF emission limits attained via the … [Read more...]
Building a State-of-the-Art 5-Meter Chamber
An efficient shield room for automotive testing progresses from design to finished structure Michael Koffink, Bob Mitchell Intertek ETL Semko Littleton, MA Four years ago, we noticed a growing demand for EMC testing from the automotive industry. As cars and trucks now feature myriad on-board electronic devices, they are increasingly susceptible to stray emissions while … [Read more...]
German Study Discounts Causal Link Between Eye Cancer & EM Exposure from Mobiles
A study appearing in the online issue of the Journal of the National Cancer Institute (JNCI) indicates that mobile phone use is not associated with an increased risk of melanoma of the eye. Earlier studies had examined the possibility of an association between mobile phone use and melanoma of the eye, also called uveal melanoma. In the recent study, Andreas Stang, MD of the … [Read more...]
Mobiles Recalled for Exceeding RF Limits
Testing by Industry Canada has revealed that the LG150 flip-phone does not meet the radiofrequency exposure limits established by the Canadian government—i.e., Safety Code 6 as referenced in the regulations of the Radiocommunications Act. An independent accredited certification body has revoked the certification for the LG 150 model, and it is no longer eligible to be … [Read more...]
More Shielding Products
Line of Silicone and Fluorosilicone Elastomers Offers Variety of Design OptionsConductive elastomers from UK-based Kemtron Ltd. are fully post cured silicones or fluorosilicones with highly conductive particles that provide low contact resistance between mating surfaces. The various fillers have been chosen to ensure galvanic compatibility between the surfaces. Extruded … [Read more...]
Boosting Lab Quality
A Memorandum of Agreement (MOA) has been executed between the international Association for Radio, Telecommunications and Electromagnetics, Inc. (iNARTE) and the ANSI-ASQ National Accreditation Board LLC (d.b.a. ACLASS). The MOA provides a framework for both organizations to cooperate in the development of training and professional certification programs intended for managers … [Read more...]
Product Environmental Regulatory Compliance: The Current Status Worldwide
The drive to protect the environment and to conserve natural resources has brought about a proliferation of regulations Tony Dibiase As the clamor for better and newer electronic products continues worldwide, there is increased concern over landfills accepting growing “mountains” of discarded electronic products. Consequently, global environmental regulatory compliance … [Read more...]
A Look at the FCC SAR Test Procedures for 802.11-based Products
We now have FCC SAR test procedures for 5-GHz WLAN David A. Case, Cisco Systems, Inc. Richland, OH The engineers involved with certifying 802.11-based products, specifically portable devices, are aware of the headaches that Specific Absorption Rate (SAR) testing can cause. Until recently there was not a clear test procedure for qualifying such devices for Federal … [Read more...]
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