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Keith Armstrong

After working as an electronic designer, then project manager and design department manager, Keith started Cherry Clough Consultants in 1990 to help companies reduce financial risks and project timescales through the use of proven good EMC engineering practices. Over the last 20 years, Keith has presented many papers, demonstrations, and training courses on good EMC engineering techniques and on EMC for Functional Safety, worldwide, and also written very many articles on these topics. He chairs the IET’s Working Group on EMC for Functional Safety, and is the UK Government’s appointed expert to the IEC committees working on 61000-1-2 (EMC & Functional Safety), 60601-1-2 (EMC for Medical Devices), and 61000-6-7 (Generic standard on EMC & Functional Safety).

From This Author

EMC Testing

Complying With the EU’s EMC Directive Without 3rd Party Testing

Many manufacturers believe that third-party testing is required to meet the requirements of the EU’s EMC Directive. But there are other, legally acceptable paths to demonstrate compliance with the EMC Directive that do not require the use of a third party.
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Banana Skins – February 2024 (#437-444)

A manufacturer of electrical test equipment took an order worth several million dollars for new product to be used worldwide to help service the vehicles manufactured by a major multinational.
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Banana Skins – October 2023 (#433-436)

The paper machine process requires precise control of the paper sheet tension as it progresses through the machine.
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Banana Skins – July 2023 (#429-432)

One car manufacturer found that the craze for CB radio caused more than a jamming of the airwaves.
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Banana Skins – June 2023 (#424-428)

Spacecraft now and of the future are being controlled by EMC requirements of the past.
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Banana Skins – April 2023 (#422-423)

This experiment investigates the susceptibility of an ECG machine to emissions from unintentional emitters such as Gameboy™, iPod Nano™, and more.
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Banana Skins – January 2023 (#415-416)

A new consortium will investigate problems associated with interference, jamming, and multi-path activity affecting the integrity of GNSS applications.
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Banana Skins – November 2022 (#411-414)

It has been reported widely in the Japanese press that electromagnetic interference caused by illegally modified transceivers on trucks is suspected of causing two accidents by disabling the braking system of commuter buses.
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Banana Skins – November 2022 (#404-410)

The Japanese National Institute of Technology and Evaluation has announced that they have confirmed that some of the household electrical heaters available in Japan malfunction when subjected to electrical disturbances.
Cabling and Connectivity

Getting the Best EMC from Shielded Cables Up to 2.8 GHz, Part 2

Part 2 of this article summarizes the results of recent testing conducted by the author on the shielding effectiveness of screened cables up to 2.8 GHz.
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