Radio Free Europe has issued a statement on a “very disturbing” case that smacks of “deliberate interference” by the Kazakh government , Internet users have been prevented for more than five weeks from accessing the Kazakh-language website of Radio Free Europe/Radio Liberty. Access to the Kazakh site was interrupted on April 11 and has continued despite RFE/RL’s repeated … [Read more...]
Active Filter Protects DC-DC Converters in Harsh Electrical Environments.
The DSF500 from XP Power is a 500-W active filter unit for use in harsh electrical environments. It has been crafted to protect DC-DC converters from the surges, spikes, and ripples that are typically found within the electrical system of any military platform—such as aircraft or vehicles. This filter complies with MIL-STD 1275A-D without the incorporation of any additional … [Read more...]
National Security Agency Declassifies Report on TEMPEST
On April 29, 2008, the National Security Agency declassified a report titled, "TEMPEST: A Signal Problem--The story of the discovery of various compromising radiations from communications and Comseq equipment." The story begins during World War II when a researcher noticed that every time a Bell Telephone encrypting machine encrypted a letter, a spike appeared on an … [Read more...]
A Second Look at the FCC Dynamic Frequency Selection Certification Issues
Both manufacturers and test labs must decide on the proper test procedures for DFS products. Since July 20, 2006, systems operating under FCC Part 15.407, specifically in the 5250- to 5350-MHz and the 5470- to 5725-MHz bands, are required to support Dynamic Frequency Selection (DFS) before the products can be certified. As part of the approval process, the FCC must carry out a … [Read more...]
In-Flight Cell Phone Ban Approved by Congressional Committee
H.R. 5788 received approval via voice vote by the House Transportation and Infrastructure Committee and can now move on to consideration by the U.S. House of Representatives. This bill would make permanent the long-standing ban on onboard use of cell phones by the Federal Aviation Commission and the Federal Communications Commission. Cell phone calls have long been prohibited … [Read more...]
Reminder: Hearing Aid Compatibility Agents Must Be in Place
The Consumer and Government Affairs Bureau of the Federal Communications Commission released the 2008 Hearing Aid Compatibility Report and Order on February 28, 2008. The obligations placed on wireless handset manufacturers and public mobile service providers became effective on June 6, 2008. Specifically, the Commission amended section 68.418 of the hearing aid compatibility … [Read more...]
News from 2008 EMC Detroit: Intertek Sponsors Roundtable Discussion on EMC Trends
Internationally-known testing firm Intertek sponsored a roundtable discussion: the Third Annual Broad Spectrum EMC Forum--"What Trends Will Effect You, and What Can You Do About Them?" Moderated by Intertek's Roland Gubisch, the panel included Kurt Fischer of NIST, Lee Hill of Silent Solutions, Derek Walton of LF Research, and Werner Schaefer of Cisco Systems.The remarkably … [Read more...]
CAP Wireless Signs McBride Scientific Sales as Manufacturer’s Representative for U.S. Southern Region
CAP Wireless, Inc. (CAP), a leading supplier of high-performance microwave and RF amplifiers and amplifier-based subsystems, today announced that in order to provide dedicated service and support to customers in the Southern Region of the United States, the company has signed McBride Scientific Sales, Inc. as a manufacturer’s representative for Texas (except El Paso), Oklahoma, … [Read more...]
FCC Releases Test Results on Possible Interference in the 2155- to 2180-MHz Band
The Federal Communications Commission (FCC) has released a study completed last month by its Office of Engineering and Technology. One of the ongoing goals of FCC policy has been to expand broadband access to more citizens—especially in impoverished or rural areas. Any auction of this particular band would be conducted with the proviso that the winning bidder would be obligated … [Read more...]
Industry Canada Issues Technical Changes for Radiotelephone Systems
The Spectrum Management and Telecommunications division of Industry Canada has issued “Technical Requirements for Cellular Telephones Operating in the Bands of 824 – 849 MHz and 869 – 894 MHz.” This document, referred to as Issue 7 of SRSP (Spectrum Radio System Plan) includes a number of changes intended to bring about better coverage and higher throughput for mobile data … [Read more...]
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