The European Commission has announced rules that would allow air lines to offer passengers midair mobile phone calls across the European Union. The technology to be covered by the Commission's rules links passengers' phones to onboard cellular networks that are then connected to the ground via satellite, while ensuring that transmission levels for outgoing and incoming calls … [Read more...]
Triple-Output Stepdown Switching Regulator IC Uses Multiphase Switching to Reduce EMI
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...]
NextWave Wireless Moves to Sell Its U.S. Spectrum Holdings
Wireless telecom provider, NextWave Wireless, Inc. recently announced that it has retained Deutsche Bank and UBS Investment Bank to explore the sale of its extensive spectrum holdings in the United States. NextWave's U.S. footprint covers more than 251 million people in the United States and includes major markets such as New York, Los Angeles, Chicago, San Francisco, Boston, … [Read more...]
Australia Launches Consultation on Future Use of the Electromagnetic Spectrum
In a move reminiscent of actions taking place around the globe, Australian telecom regulator ACMA (Australian Communications and Media Authority) is seeking public and industry feedback on two documents that indicate ACMA's strategies for meeting the future demands for spectrum allocation. The two consultation papers, Spectrum Management and Principles and Five-Year Spectrum … [Read more...]
Ofcom Publishes List of Qualified L-Band Bidders
British telecom regulator Ofcom has published the list of approved bidders for the upcoming auction of L-Band spectrum. L-Band designates the spectrum from 1452 MHz to 1492 MHz. Ofcom has split the spectrum offerings, each of which is 1.7 MHz wide. One larger swathe at the top of the range is 12.5 MHz wide. As the UK media have pointed out, the list of bidders is not … [Read more...]
Chip Ferrite Beads Provide Effective EMI Suppression
The BLM Series of chip ferrite beads from MuRata Manufacturing has been crafted to function nearly as a resistor at noise frequencies--a characteristic that greatly reduces the possibility of resonance and leaves signal waveforms undistorted. This series is effective in circuits without stable ground lines because it does not need a connection to ground. The nickel barrier … [Read more...]
ISO Amended Standard: Road Vehicles & Electrical Disturbance
The International Standards Organization has published ISO 7837-1 Amd 1: 2008 entitled "Road vehicles - Electrical Disturbance by conduction and coupling - Part 2: Commercial vehicles with nominal 24-V supply voltage - Electrical transient conduction along supply lines only - Amendment 1. This new publication amends ISO 7637-2: 2004. For more information, or to purchase this … [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...]
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...]
“CERTIFIED TEST LABORATORY AUDITOR”
New Bern, NC, Jan 23, 2009 -- A Memorandum of Agreement (MOA) was 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 … [Read more...]
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