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Playing Nice in the EMI Sandbox
Jim Jenkins - Applied Technology Institute Jim Jenkins - Applied Technology Institute
For Immediate Release:
Dateline: Annapolis, MD
Wednesday, February 2, 2022


If you wear a pacemaker, you are probably already aware of the precautions you must take when you are in the vicinity of certain other devises.  For those that may be unaware, there are many devices should never come into contact with the skin above the pacemaker, cordless telephones or electric razors for example.  There are other devices which should never be within six inches of the pacemaker, Bluetooth emitters for example.  And there are other devices that should never be used in the same room as a pacemaker patient, stun guns for example.  Have you ever wondered why these restrictions exist?

When an electronic device operates, changing electrical currents and voltages cause electromagnetic interference ( EMI ).  This EMI is transmitted into the space around the device, and can cause other proximate devices to malfunction, or to stop functioning all together.  When an engineer designs a device, he must be acutely aware of how much EMI the device will transmit into the surrounding space, and he must also be aware of how much EMI can be present in his own space for his device to operate properly.  The ability to both of these things, is called Electromagnetic Compatibility (EMC).  In order to go to market and sell a device in the US, the FCC must test your device to confirm its emitted EMI is below the regulated threshold, and it also tests to make sure your device continues to operate in the presence of EMI at that threshold.  Said in another way, they ensure your device is Electromagnetically Compliant.  In other countries, the thresholds may be different, and the Testing Agency will be different, but compliance testing will be encountered in every country.

Since formal Compliance Testing by the FCC is a lengthy and expensive proposition, most engineers will try to monitor and test their Electromagnetic Compliance themselves before they contact the FCC for formal testing.  This informal testing by the engineer is critical to ensure that the device design ultimately stays on time and on budget.

In general, if a device is not Electromagnetically Compliant, the FCC will not allow it to go to market.  In some cases, however, the device is not compliant and can not be designed differently.  If the device is considered medically essential, it will be allowed to go to market, with very clear operating restrictions.  This is the case with Pacemakers.

If you want to learn more about the Formal FCC Compliance Testing, or if you want to learn more about how to informally test your device prior to formal testing, or if you want to learn how to design your circuits so that you will pass informal and formal testing, consider taking the upcoming ATI course EMC PCB Design and Integration.  You can learn more about the course, and register for it here.

And, as always, you can look at our other classes, and our upcoming schedule of offerings at www.aticourses.com

About Applied Technology Institute (ATIcourses or ATI)

ATIcourses is a national leader in professional development seminars in the technical areas of space, communications, defense, sonar, radar, engineering, and signal processing. Since 1984, ATIcourses has presented leading-edge technical training to defense and NASA facilities, as well as DOD and aerospace contractors. ATI’s programs create a clear understanding of the fundamental principles and a working knowledge of current technology and applications. ATI offers customized on-site training at your facility anywhere in the United States, as well as internationally, and over 200 annual public courses in dozens of locations. ATI is proud to have world-class experts instructing courses. For more information, call 410-956-8805 or 1-888-501-2100 (toll free), or visit them on the web at www.ATIcourses.com.

Note: Accredited media are invited to attend for free.
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Name: Jim Jenkins
Title: President
Group: Applied Technology Institute
Dateline: Annapolis, MD United States
Direct Phone: 410-956-8805
Main Phone: 410-956-8805
Cell Phone: 410-956-8805
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