Model PL7004 (800 MHz – 3.6 GHz / 80 – 800 V/m) from AR RF Microwave Instrumentation is a new laser-powered E-field probe for measuring the E-fields in radiated immunity testing and in GMW3097 and Ford ES-XW7T-1A278-AC automotive radar pulse tests. This device has been crafted to measure the RMS value of the “on time” of a pulsed electric field. Each probe is supplied with … [Read more...]
EMI and Other Factors to Be Examined in Qantas Airbus Plunge
EMI and Other Factors to Be Examined in Qantas Airbus PlungeThe Australian Transport Safety Bureau (ATSB) is carrying out an investigation into what caused a Qantas Airbus A330-300 to make an uncontrolled climb and dive that resulted in injuries to 74 passengers, with 51 requiring hospital care for serious injuries including fractures, lacerations, and spinal damage. Qantas … [Read more...]
German Study: Living Near Powerful Transmitters Does Not Increase Childhood Leukemia Risk
Scientists from Johannes Gutenberg-University of Mainz have released the results of a study that indicates that children living in the vicinity of powerful radio and television transmitters are not significantly more at risk than others for developing childhood leukemia. Study results can be found in the “Epidemiological Study on Childhood Cancer and Proximity to Radio and … [Read more...]
Robert Yff, Founder of Panashield, Dies after Fall
Robert Yff, age 77, a longtime Norwalk resident, died Sunday October 19, 2008 of injuries sustained from a fall at the summer home he built on Fire Island. Born in Venezuela of Dutch parents on January 22, 1931, he was the son of the late Johannes Yff and Sophia Magdalena Korlaar Yff. Robert was the husband of Mary Margaret "Peggy"Girard Yff. He was pre-deceased by his first … [Read more...]
Meeting Military Requirements for EMC and Transient Voltage Spike Suppression
The basics of EMI and transient compliance for military systems using SMPSs are covered. Dr. Glenn Skutt, VPT, Inc., Blacksburg, Virginia, USA THE EMI AND VOLTAGE TRANSIENT CHALLENGE Military and aerospace engineers face several challenges with respect to electromagnetic interference (EMI) and transient voltage compliance. The standards developed by the various military … [Read more...]
Inrush Current in DC-DC Converters
Some applications may require limiting the inrush spike into the input capacitors. Steve Butler and Jeremy Ferrell, VPT, Inc., Blacksburg, Virginia, USA BACKGROUND Inrush current is the spike of current drawn by a power supply when it is turned on. A typical power system is shown in Figure 1. The input EMI filter will include some capacitance connected across the input … [Read more...]
Radio Operators Oppose Proposed Change to Disturbance Limits of CISPR 22
Recently there has been a flurry of activity opposing the proposed change to the disturbance limits of CISPR 22. Objections focus on proposed Power Line Telecommunications (PLT) disturbance limits, which would be relaxed by 18 dB. These disturbance limits for Power Line Telecommunications (PLT) systems are defined by the standard CISPR 22 and its European equivalent EN 55022 … [Read more...]
New EMC Testing Facility Seeks to Boost Retailers’ Product Confidence
A new EMC testing facility has been launched by UK-based TÜV Product Service. This is a unique “spot check” testing facility for retailers, who can now determine if the electronic products they offer comply with existing standards and laws. Specifically, the testing will confirm whether household electrical items such as TVs, camcorders, and game consoles will interfere with … [Read more...]
Aluminum SMD Capacitors Target Consumer and Industrial Applications
A new line of SMD electrolytic capacitors from EPCOS covers a capacitance range from 0.1 µF to 1500 µF and are suited for voltages from 4 VDC to 100 VDC. Versions are available for temperature ranges from -40 to +85 degrees C. Depending on the CV value, the case sizes vary between 4 mm x 5.4 mm and 10 mm x 10 mm (d x l). The B41142* series with ESR values from a minimum of 0.8 … [Read more...]
FCC to Test for Interference Between Wi-Fi and Cellular Phone Networks
The Federal Communications Commissions’ Office of Engineering and Technology has begun running tests in Seattle, WA to determine the extent of spectrum interference between next-generation Wi-Max systems and cellular phone networks. A provision of the FCC’s slated auction of the 2155- to 2180-MHz band is that a winning bidder must set up a free wireless broadband network. … [Read more...]
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