Henry Ott Consultants
Electromagnetic Compatibility Consulting and Training
May 25, 2016
On December 11, 2015 the Department of Defense released a
The revised standard includes two additional susceptibility
requirements. CS117 for lightning-induced transients on cables and
power leads, and CS118 for personnel-borne electrostatic discharge.
CS106 (conducted susceptibility, transients, power leads) had been
deleted, presumably replaced by CS117. In addition, technical updates
have been added to RE102 (Radiated Emission, Electric Fields) and RS103
(Radiated Susceptibility, Electric Fields).
A copy of the standard (dated 12/11/15) is available at http://quicksearch.dla.mil/Transient/39694326ABA3451E9EA9335D190480B1.pdf
April 3, 2014
New EMC Directive Published
On March 29, 2014 the European Parliament
published a new updated version of the EMC directive in the Official
Journal of the European Union. Click here for more detailed information.
March 12, 2014
Ferrite Cores for Low-Frequency EMI Cable Suppression
It is common to use ferrite cores on cables to reduce high-frequency
(> 10 MHz) emissions and/or susceptibility. For low-frequency (<
10 MHz) emission/susceptibility problems, however, ferrite cores have
not been very useful, since their impedance is too low to be effective
at these frequencies.
Recently Fair-Rite Products Corp. has introduced a new low-frequency
Type 75 ferrite material optimized for EMI suppression in the 200 kHz
to 30 MHz frequency range. These ferrite cores have an impedance peak
in the 1 to 2 MHz range. For more information on these low-frequency
suppression cores see my recent blog or download Fair-Rite’s Low-frequency Suppression Flyer.
Dave Jones and Chris Gammell of The Amp Hour podcast interview Henry
Ott on 9/30/13. (broadcast on 10/1/13, ≈105 minutes)
EMC Icon Passes Away
On June 27, 2012 Dr. Clayton R. Paul passed away. This is a great loss,
he will be sorely missed by the many of us who knew him. Read my Tribute to Clayton.
Portable Electronic Devices on Aircraft
Why do you have to turn off your portable electronics devices on an
airplane during takeoff and landing? Check out this video by Boeing to
Henry Ott is Featured Engineer on EEWeb
Check out the EEWeb Featured Engineer interview with Henry Ott at http://www.eeweb.com/spotlight/interview-with-henry-w.-ott
New EMC Book
"Electromagnetic Compatibility Engineering"
by Henry W. Ott has just been published (August 2009) by John Wiley
& Sons. A new book from the author of the very popular book "Noise
Reduction Techniques in Electronic Systems, Second Edition."
Hardcover, 872 pages, 566 figures.
EMC Book Receives Scholarly Publishing Award
From: Interference Technology eNews, March 4, 2010
Compatibility Engineering,” written by Henry Ott and published by
John Wiley & Sons Inc., received a PROSE Award for 2009 in the
subject of Engineering & Technology. The PROSE Awards annually
recognize the best in professional and scholarly publishing by bringing
attention to distinguished books, journals, and electronic content in
over 40 categories. The awards have been judged by peer publishers,
librarians, and medical professionals since 1976.
European Union EMC
EMC Directive (2004/108/EC)
A new updated version of the fifteen year old EMC Directive
(89/336/EEC) was published in the Official Journal of
the European Communities on December 31, 2004 as Directive 2004/108/EC. The new
directives protection requirements remain essentially the same,
however, most other aspects of the
directive have been completely rewritten. See EMC Regulations for more information.
EMC Directive Standards List
list of harmonized standards under the new EMC directive
2004/108/EC (previously 89/336/EMC)
along with their effective dates was published in the Official
the European Communities (OJ) on October 23 2012.
list replaces all previous lists published in the OJ.
The list is available at: http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:C:2012:321:0001:0020:EN:PDF
Location of Future IEEE EMC Society
2019: New Orleans, LA, July 22-26, 2019
2020: Reno, NV, July 27-31, 2020
Henry Ott Consultants
48 Baker Road Livingston, NJ 07039
Phone: 973-992-1793, FAX: 973-533-1442
October 18, 2018 (jw)