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Interference Technology

For EMI / EMC Engineers

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ACIL Industry-wide Survey on RF Device Compliance

 

The certification community has a unique perspective on the compliance of new wireless devices. As the number of FCC-certified devices grows to over 10,000 in the past year — and growing year-on-year — the number of intentional radiators marketed each year will approach 20,000 at some time in the near future. To ease access to markets and allow technologies (particularly mature … [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...]

ETSI EN 301 839 Part 1

 

Technical characteristics and test methodsETSI EN 301 839-1 V1.3.1, published in October, is part 1 of a multi-part deliverable covering Short Range Devices; Ultra Low Power Active Medical Implants (ULP-AMI) and Peripherals (ULP-AMI-P) operating in the frequency range 402 MHz to 405 MHzElectromagnetic compatibility and Radio spectrum Matters; Short Range Devices; Ultra Low … [Read more...]

Integrated Protection and Signal Termination Device

 

STMicroelectronics has announced its new SCLT3-8BT8 integrated protecton and signal-termination device. The device combines field signal-termination and protection functions, enabling designers of industrial control and building-automation equipment to increase system performance and EMI robustness while simultaneously cutting power consumption, size, and heat dissipation.Read … [Read more...]

Optically Isolated Power Relay Avoids EMI Issues

 

Clare Inc. recently announced the availability of an AC solid state switch utilizing dual optically isolated power SCRs as an integrated alternative to discrete optocoupler and Triac circuits. The company says that optically coupled circuitry provides exceptional noise immunity and 3750Vrms of isolation between the control and the output and that the product is well suited for … [Read more...]

COTS Filters Perform in Extended Temperature Range

 

LCR Electronics recently announced that it now offers a line of single phase 300 VAC 50/60Hz COTS filters ideal for high reliability applications as found in the lighting, military and medical industries. Operating over an ambient temperature range of -40°C to +85°C (-40°F to +185°F), the new RoHS-compliant Single Stage 0913 Filters and Double Stage 0923 Filters are used where … [Read more...]

Just Another Day in a Faraday Cage

 

For some engineers, going to work some days means closing themselves into tomblike rooms that let in no light, little sound and, most importantly, hardly any of the multitude of madly pulsing radio waves emanating from cell phones, laptops and PDAs in the community. Copper mesh cages, called Faraday cages for the 19th-century scientist who invented them, disperse … [Read more...]

Etched Parts for Wireless, Portable Industry

 

Photofabrication Engineering Inc. manufactures a full line of custom photochemically etched metal components for wireless and portable handheld cell phones and other devices in the communications and telecommunications markets. The company provides custom-etched gaskets, EMI/RF shields, face plates, screens, and other components, and can etch materials in thicknesses from thin … [Read more...]

Airport Landing System Victim of EMI

 

Lubbock Preston Smith International Airport in Lubbock, Texas, had been shut down for nearly a week after problems with the instrument landing system forced numerous flight delays and cancellations. FAA spokesperson Lynn Lunsford pointed to electromagnetic and radio interference as the cause. “There was a spurious radio signal in the vicinity of the final approach path, doing … [Read more...]

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