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...]
EMC Practice – Measurement Under Interference
Clean transmission of signals from the EUT. Jorg Hacker Langer EMV-Technik GmbH It is uncommon to use an oscilloscope to monitor signals from the EUT when testing immunity to interference. The complicated environmental conditions in the anechoic chamber during RF irradiation or burst and ESD tests lead to measuring errors and unwanted interference in the EUT. Modifications to … [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...]
Low Loss LL335i and LL142 Cable Assemblies Up to 18 GHz
Microwave and RF product supplier Fairview Microwave has introduced a new line of low loss test cables using LL335i and LL142 coax. Rated to 18 GHz, these new low loss cable assemblies are ideal for test environments where a rugged, phase stable cable assembly is required. According to the company, the new LL335i and LL142 cables allow for higher power transmission because the … [Read more...]
Software Option for EMC Testing in Line with New CISPR Standard
Test and measurement equipment provider Rohde & Schwarz has introduced a new software option for EMC tests on multimedia devices in line with the new CISPR 35 standard. Expected to be adopted in late March, the CISPR 35 EMC standard prescribes future disturbance signal testing requirements for multimedia equipment and will combine the current test standards for devices and … [Read more...]
Vector Signal Transceiver Features 200 MHz RF Bandwidth for Testing Latest Standards
National Instruments had released the new NI PXIe-5646R vector signal transceiver with 200 MHz of RF bandwidth designed for testing the latest wireless standards such as IEEE 802.11ac, 160 MHz WLAN and LTE Advanced. Engineers can use the open software design of the vector signal transceiver to develop channel emulation systems, radio prototyping, custom real-time signal … [Read more...]
Widest Band Amplifier Yet Opens Door to Ultrafast Broadband
A research collaboration between European scientists has yielded a breakthrough in wideband amplifier circuit design. Researchers from University College London (UCL), UK and Chalmers University of Technology, Sweden have successfully designed and tested an amplifier that operates from low GHz frequencies to frequencies exceeding 235 GHz. The new amplifier also features a gain … [Read more...]
Portable Suction Devices May Interfere With Defibrillators
New research from scientists in the UK suggests that electromagnetic radiation from portable suction devices could interfere with some defibrillators, rendering them inoperable in a medical emergency. According to Siu-Man Lee, Ph.D. from the Royal United Hospital Bath, Philips HeartStart MRx defibrillators are known to fail without warning during battery power operation if … [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...]
Liquid-Cooled High-Power Broadband Amplifier for EMS Testing
Rohde & Schwarz has released new liquid-cooled high-power broadband amplifiers ideal for EMS tests where high field strengths are required. Offering up to 10 kW of power in a frequency range from 9 kHz to 225 MHz, the new R&S BBL200 amplifier family is particularly suited for testing in the automotive, aerospace and defense sectors in line with standards such as MIL … [Read more...]
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