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For Remote Patient Monitoring Systems, Wireless Coexistence Can Be Lifesaving

 

The demand for wireless medical applications such as remote patient monitoring, real-time diagnostic analysis, smart surgical systems, and implantable sensors have grown significantly over the last couple of years. Thanks to implanted medical devices, many patients live an almost normal life without having their mobility compromised. Popular implants include cardiac pacemakers, … [Read more...]

Don’t Rely on the Stability of the Mains Frequency

 

My old colleague and good friend Tim Williams sent me the story below for inclusion in EMI Stories/Banana Skins, and I found it so interesting in so many ways that I decided to publish it as a Blog. In so very many EMC standards and other meetings on EMC, we hear that the stability of the AC mains power frequency is either ‘not an EMC issue’ or is ‘never a real EMC … [Read more...]

MIL-STD-461G Implications with RE102 Changes

 

Introduction: MIL-STD-461G was issued in December 2015 incorporating many changes throughout the document prompting user questions or interpretations.  Laboratory situations arise where the generic guidance requires specific situational decisions and the most common tests such as RE102 are included.  The user quickly realizes that the given direction does not make sense for a … [Read more...]

EMC Question for 400Hz Power System

 

Question: I would appreciate it if you could provide your view / share your expertise on the EMC/EMI protection requirements between the  400Hz Ground Power Systems and the various ICT/ELV installations within an Aircraft. Answer: An interesting and important question! And much too big an issue to be able to deal with comprehensively, in a blog post. The … [Read more...]

Under the Medical Safety Standard IEC 60601-1-1:2014 an EMC Test Lab is not Required to Assess or Review Any Aspect of a Risk Management File

 

Note: This content was originally posted in January 2020 on emcstandards.co.uk. IEC 60601-1-2:2014 is a medical device safety standard that deals with safety risks that can be caused by electromagnetic interference with electronics. It is not an EMC compliance standard! If the EMC test lab has the necessary safety risk assessment competencies, they could review/assess the … [Read more...]

MIL-STD-461G Passive Device Calibration Review

 

The Requirement: When MIL-STD-461 revision “G” was issued, I believed that the answer to many of my measurement equipment calibration issues had been solved. Right there in the “Calibration of measuring equipment” paragraph the requirements clearly stated: After the initial calibration passive devices such as measurement system antennas, current probes, and LISNs, require no … [Read more...]

Demystifying EMC in an Electric Vehicle’s Drive Unit

 

1. Introduction The past decade has witnessed both a leap forward in technology and market expansion of the global electric vehicle (EV) industry [1]. With Tesla leading the market, followed by traditional vehicle original equipment manufacturers (OEMs) such as Volkswagen, PSA, and Toyota, to name just a few, the electrification of the automotive industry has been advancing at … [Read more...]

Review of Induced Signal Susceptibility Testing—DO-160 Section 19

 

The Issue Induced signal susceptibility has been a factor in electronic equipment performance since the dawning of voltage and current. Often referred to as crosstalk, the undesired coupling of one circuit’s signals to another may result in interference that degrades the integrity of either signal. This article examines the testing process prescribed by RTCA DO-160 Section … [Read more...]

Review of Bonding and Grounding Requirements

 

The Question What is the required bonding and grounding requirements to achieve compliance with the various electromagnetic compatibility (EMC) standards associated with electronic equipment? I received this question a few days ago and quickly realized that a quick and easy answer was not feasible since I virtually had no knowledge of what kind of equipment types were … [Read more...]

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