HighBeam Research - Newspaper archives and journal articles
Options
Cancel changes
Follow us:
  • Subscription benefits
  • Log in
  • Sign up for a free, 7-day trial
  • Publications
  • Research topics
  • Topics home
  • People
    • Artists and Entertainers
    • Company executives
    • Historical figures
    • Politicians and Government officials
    • World Leaders
  • Issues and Events
    • Health and Medicine
    • Historical Events
    • Religion and Theology
    • Science and Technology
  • Places
  • Organizations
  • A-Z
    • A-G
    • H-O
    • P-T
    • U-Z
    • 0-9
  • Publications home
  • Journals
    • Academic journals
    • Business journals
    • Education journals
    • Math and Engineering journals
    • Medical journals
    • Science and Technology journals
    • Trade journals
  • Magazines
    • Business magazines
    • Computer magazines
    • Education magazines
    • Industry magazines
    • Lifestyle magazines
    • Medical magazines
  • Newspapers
    • International newspapers and newswires
    • Reports, newsletters, and transcripts
    • U.K. newspapers
    • U.S. newspapers and newswires
  • Reference works and books
    • Almanacs
    • Dictionaries and thesauruses
    • Encyclopedias
    • Non-fiction books
  • Subscription benefits
  • Log in
  • PUBLICATIONS HOME
  • Journals
    • Academic journals
    • Business journals
    • Education journals
    • Math and Engineering journals
    • Medical journals
    • Science and Technology journals
    • Trade journals
  • Magazines
    • Business magazines
    • Computer magazines
    • Education magazines
    • Industry magazines
    • Lifestyle magazines
    • Medical magazines
  • Newspapers
    • International newspapers and newswires
    • Reports, newsletters, and transcripts
    • U.K. newspapers
    • U.S. newspapers and newswires
  • Reference works and books
    • Almanacs
    • Dictionaries and thesauruses
    • Encyclopedias
    • Non-fiction books
Home » Publications » Math and Engineering journals » EE-Evaluation Engineering » November 2010 »
  • Save
    This article has been saved!
    You may organize and add notes about this article below.
    This article has been saved!
    View all saved articles
  • Export

    To export this article to Microsoft Word, please log in or subscribe.

    Have an account? Please log in

    Not a subscriber? Sign up today

  • Print
  • Cite

    MLA

    Brewer, Ron. "A look at in situ EMC testing.(electromagnetic compatibility)(Technical report)." EE-Evaluation Engineering. NP Communications, LLC. 2010. HighBeam Research. 25 Apr. 2018 <https://www.highbeam.com>.

    Chicago

    Brewer, Ron. "A look at in situ EMC testing.(electromagnetic compatibility)(Technical report)." EE-Evaluation Engineering. 2010. HighBeam Research. (April 25, 2018). https://www.highbeam.com/doc/1G1-242670341.html

    APA

    Brewer, Ron. "A look at in situ EMC testing.(electromagnetic compatibility)(Technical report)." EE-Evaluation Engineering. NP Communications, LLC. 2010. Retrieved April 25, 2018 from HighBeam Research: https://www.highbeam.com/doc/1G1-242670341.html

    Please use HighBeam citations as a starting point only. Not all required citation information is available for every article, and citation requirements change over time.

A look at in situ EMC testing.(electromagnetic compatibility)(Technical report)

EE-Evaluation Engineering
EE-Evaluation Engineering

See all results for this publication

Browse back issues of this publication by date

November 1, 2010 | Brewer, Ron | Copyright
COPYRIGHT 2009 Nelson Publishing. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights or concerns about this content should be directed to Customer Service.
  • Permalink

    Create a link to this page

    Copy and paste this link tag into your Web page or blog:

    <a href="https://www.highbeam.com/doc/1G1-242670341.html" title="A look at in situ EMC testing.(electromagnetic compatibility)(Technical report) | HighBeam Research">A look at in situ EMC testing.(electromagnetic compatibility)(Technical report)</a>

Part 1

Performing EMC tests on large electronic equipment can be problematic especially if the EUTs can't be moved. It doesn't matter how large a test chamber may be, some EUTs must be tested in situ. Here are a few examples.

* Ares I Rocket: a 308-ft tall x 18-ft dia unit that can be launched but not moved after assembly: Multiple power, control, and signal cables run the length of the system to various redundant analog and digital sensors and equipment located at its top and bottom.

* New York City Hospital magnetic field susceptibility problem: This was caused by an underground subway passing adjacent to a neurosurgical operating room and turned out to be magnetic loop coupling from improper installation.

* RF emissions problems from an induction furnace used for annealing a moving 60-inch web of sheet steel: This turned out to be a radiation hazard issue.

* The tunnel radio system interference within Boston's Big Dig: This was an intermodulation problem.

* An Ohio coal-fired power plant control system susceptibility problem resulting from an instrumentation upgrade from vacuum tubes to solid state: One volt of noise on a 250-V plate supply is not nearly as much of a problem as it is on a 5-V logic device.

* Interference from an unattended telephone switching center in Iowa to local TV reception in a three-block radius when it was changed over from code switches to a computer-controlled digital switching system: More subscriber features, more subscriber problems.

In all of these cases, the system being tested is the combination of the installed EUT and its surrounding RF environment/equipment. Because the installed RF environment is part of the system, tests and examinations have to be done in situ; that is, tested in place. This often happens with large-scale system installations and generally is accompanied by the unexpected.

Everywhere you want to set up an antenna there is a wall, a column, a power line, a piece of equipment, and high-level RF signals that exceed the spec limit for the test. Plus in an industrial environment, the RF ambient always is changing, which makes it extremely difficult to determine what's the EUT and what's ambient.

For really big test samples, antennas may have to be hoisted up the side of the EUT using nylon rope, or the test engineer may have to perform the testing from the bucket of a cherry picker.

On-site testing is similar because it takes place where the EUT is located, but that does not imply that the EUT can't be moved. …


To read the full text of this article and others like it, subscribe today!



Related articles on HighBeam Research

EE-Evaluation Engineering
A Look at in situ EMC testing.(electromagnetic compatibility)(Technical report)

EE-Evaluation Engineering; December 1, 2010

By Brewer, Ron; 700+ words
Part 2 Ideally, most EMC tests are done at an EMC test facility with the EUT in a shielded enclosure. Sometimes, though, the EUT just can't be moved because it must be tested in its surrounding RF environment or in situ. But regardless of location, there are four primary tests to be performed:…
EE-Evaluation Engineering
Monitoring system speeds up emissions testing.(AEROSPACE/DEFENSE EMC TEST)

EE-Evaluation Engineering; June 1, 2007

By DeSalvo, Chris; 700+ words
Commercial and military/aerospace electronics manufacturers typically perform EMC tests on all new devices they design and develop. Some manufacturers also must do periodic checks on current production equipment to comply with new or changing regulations or military contracts. As a result, the…
See all related articles »

Publication Finder

Browse back issues from our extensive library of more than 6,500 trusted publications.

Popular publicationson HighBeam Research

The Mirror (London, England)
U.K. newspapers
Newsweek
National newspapers
The Christian Science Monitor
Religious magazines
The Nation
Political magazines
Chicago Sun-Times
Illinois newspapers
Visit Cengage Brain
  • Company
  • About us
  • Subscription benefits
  • Group subscriptions
  • Careers
  • Privacy policy
  • Terms and conditions
  • Contact us
  • Help topics
  • FAQ
  • Search tips
  • Using the Research Center
  • Billing questions
  • Rights inquiries
  • Customer Service
  • Cengage Learning Network
  • Questia
  • CengageBrain.com
  • HighBeam Business
  • ed2go
  • MiLadyPro
  •  
HighBeam Research
Follow us:

HighBeam Research is operated by Cengage Learning. © Copyright 2018. All rights reserved.

The HighBeam advertising network includes: womensforum.com GlamFamily