Radio frequency (RF) interference can cause major quality of experience issues for users of communications and broadcast systems Viavi Solutions has developed a fully-automated interference hunting solution, InterferenceAdvisor, that allows an RF engineer to identify and locate an interference sources quickly, using a familiar map-based application on an Android tablet. … [Read more...]
Blog Post – DC-DC Converter Noise Evaluation
By Kenneth Wyatt More of my clients are starting to use small third-party DC-DC converters to provide the multitude of voltages required for today’s processor and DDR RAM ICs. While these are convenient to drop onto a circuit board, they can be quite a source of radiated and conducted emissions – especially those that switch in the MHz range... To read the full blog post, … [Read more...]
Blog Post – EMC & It’s Role in Reliabilty
By Ken Javor Totally anecdotal, but this just happened to me. My wife uses a powered wheelchair. A very high end, high quality chair. We were on vacation driving north and had just crossed the 45th parallel in the state of Michigan. The 45th parallel anywhere is halfway between the equator and the North Pole. In Michigan it’s also halfway to nowhere, and it was there my wife’s … [Read more...]
Russian-Detected Signal Likely Terrestrial Interference
(August 31, 2016) According to The Guardian, "The team of scientists manning a huge radio telescope high in the Caucasus region have said that the signal they believed at first to have originated from distant star HD164595 was most likely the result of 'terrestrial interference'." "The Ratan-600, a telescope located in Zelenchukskaya in the Caucasus mountains, surveys as much … [Read more...]
DC-DC Converter Noise Evaluation
By Kenneth Wyatt, Wyatt Technical Services LLCMore of my clients are starting to use small third-party DC-DC converters to provide the multitude of voltages required for today’s processor and DDR RAM ICs. While these are convenient to drop onto a circuit board, they can be quite a source of radiated and conducted emissions – especially those that switch in the MHz range.I … [Read more...]
In-House Verification of EMI Test Equipment
SAE International has made available the AIR6236A document. This AIR provides guidance to the EMI test facility on how to check performance of the following types of EMI test equipment: current probe, Line Impedance Stabilization Network (LISN), directional coupler, attenuator, cable loss, low noise preamplifier, rod antenna base, and passive antennas. All performance checks … [Read more...]
New Line of EMC Antennas from 1-18 GHz
MVG's new EH118 EMC Dual Ridge Horn Antenna is the first in a new line of antennas for radiated emissions testing. The EH118 is applicable for commercial, military and automotive test standards and will include applicable calibrations. It includes a biconical antenna, a log-periodic array, a log/biconical hybrid and several dual-ridge horns to cover various frequency bands … [Read more...]
New 3.2 / 7.5 GHz Spectrum Analyzer Released
Rigol Technologies recently announced their new DSA832E 3.2 GHz spectrum analyzer, based on the small DSA800-series form factor. The analyzer is ideal for design and development implementing Wi-Fi, Bluetooth, and other RF standards. The 7.5 GHz instrument enables engineers to investigate the 3rd harmonic of all of their critical 2.4 GHz applications while the 3.2 GHz models … [Read more...]
FCC Fines Radio Operator for Malicious Interference
(August 2, 2016) Recently the FCC imposed a penalty of $25,000 against William F. Crowell for operating an amateur station in violation of Section 333 of the Communications Act and Sections 97.101(d) and 97.113(a)(4) of the Commission’s rules, by intentionally causing interference to other amateur radio operators and transmitting prohibited communications, including music. The … [Read more...]
New Stealth Technology Makes Russian Electronic Equipment Undetectable
(August 5, 2016) Russian scientists have developed a new ferrite-based fabric that promises to have the ability to make Russian military hardware much harder to detect for enemy electronic warfare systems. According to Sputnik News, "The new lightweight and highly flexible fabric, developed by the Rostec subsidiary JSC Ruselectronics, can protect the electronic equipment … [Read more...]
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