Tom Mullineaux RF Engineer From a cold, dispassionate RF engineering perspective, the automotive radiated test set-up is a strange looking transmit/receive arrangement, with the cable harness of the equipment under test (EUT) suspended above a large copper sheet acting as the transmitter, and a huge antenna close to the chamber floor, and partly in the shadow of the copper … [Read more...]
UPDATE: Toyota Documents Show EMI as Possible Root of Sudden Acceleration Problem
UPDATE March 19, 2014 The U.S. Justice Department announced Wednesday that Toyota Motor Corporation will pay $1.2 billion to settle a criminal probe into whether the automaker handled reports of safety issues in its vehicles properly. The agreement ends a four-year investigation into sudden unintended acceleration complaints dating back to the late 2000s. The issue first … [Read more...]
Inexpensive Radiated Immunity Pre-Compliance Testing
As an EMC consultant, it seems that lately I’ve run into many client projects where radiated immunity has cropped up as the major issue. One reason for this may be the trend in using digital and analog circuits that are powered by 3.3 volts, and lower, which decreases noise margins significantly. Sensitive analog circuitry is also greatly affected. The compliance testing for … [Read more...]
Training the Intern and Elephant in the Test Room #2 Continued
Read other posts in the "Elephant in the Test Room" series here.Elephant #2 - Disharmony in Harmonic LimitsThe Room: RF immunity testingThe Elephant: The curbing of the contribution made by harmonics to a calibrated test-field varies wildly from standard to standard, and within standardsThe Culprit: Harmonic limits that are seemingly not well thought through, and / or are open … [Read more...]
ESD Simulator Pistol Upgraded with Color Touchscreen Display
Teseq, a developer instrumentation and systems for EMC emission and immunity testing, has enhanced its NSG 438 electrostatic discharge (ESD) simulator to include a new color touch display, allowing users to change settings and features right on the pistol. The NSG 437 ESD simulator also includes this unique, new feature. Reportedly the first ESD pistol on the market with a … [Read more...]
EV ‘Charge-Packet’ Method May Prevent Electric Grid Crash
Researchers at the University of Vermont have created a new method to handle the strain new electric vehicles will place on the nation’s electric grid. Plug-in electric vehicles, while still a small portion of the automotive market, continue to grow rapidly in popularity in part due to decreasing manufacturing costs and wider availability. In 2013, sales of full electric and … [Read more...]
Audi to Investigate After Woman Becomes Trapped in Vehicle
Audi officials are investigating the locking mechanisms of an Audi Q3 after an Australian woman became trapped inside the vehicle, which is equipped with keyless-entry, last weekend. "I got in, shut the door, went to press the start button and a message came up saying 'key not identified'," Amanda Stevens, from Noosa, Queensland, told The Sidney Morning Herald. "All the doors … [Read more...]
EMI Named as Cause in Ferry Crash Lawsuit
BC Ferries is suing a German manufacturer of ship control systems in connection with a 2011 incident in which a ferry rammed a dock in Nanaimo, British Columbia, Canada The British Columbian ferry operator is seeking at least $4 million in damages from SAM Electronics GmbH for the Dec. 20, 2011 crash at Duke Point, which injured seven passengers and nine crew members and … [Read more...]
ESD Protectors Guard Sensitive Automotive Electronics
Electronic component manufacturer Bourns, Inc. has announced the release of new ChipGuard ESD protectors designed to guard sensitive automotive electronics from electrostatic discharge. Qualified to meet up to IEC 61000-4-2 Level 4 standards, the Bourns CGA-MLC Series of ESD protectors are available in industry-standard 0402 and 0603 packages and feature low capacitance, … [Read more...]
MLCCs for EMI Noise Suppression in Automotive Applications
Murata has announced two new additions to its line of radial-leaded multi-layer ceramic capacitors (MLCC) for high frequency EMI noise suppression in automotive applications. The RCE and RHE series conform to both the automotive environmental stress test requirement AEC-Q200 and conducted surge pulse immunity specification ISO7637-2. The RCE series includes capacitors in the … [Read more...]
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