A reader recently asked me what the top design rules were that they could implement on their product to maximize the chances of passing FCC and CE testing. There’s no doubt that there are countless ways to fail emissions and immunity tests, but a pattern of failure modes did emerge at my EMC lab.Regardless of the type of product I was testing, be it medical, industrial, … [Read more...]
Linearization of EMC Amplifiers and Fixing the Broken Automotive Emissions Test Fixture
Read other posts in the "Elephant in the Test Room" series here.Linearization of EMC AmplifiersThis section of the posting got a little long-winded but it at least serves two purposes. It is a step closer to closing Elephant in the Test Room #2 ‘Disharmony in Harmonic Limits,’ and it also helps determine the linearization target on the TWT amplifier we are working with.The … [Read more...]
A Crossword Just for EMC
ACROSS3) and 6) down. If the walls have ears in this judge’s room, don’t expect a reply 7) and 8) across. EHT can cause this to light up the dark8) See 7) across10) A heck of a lot of power, apparently12) The theme of this crossword13) Germany’s own version of 12) across14) A few billion of these involved in 7) across16) With 15 down the bible of EMC since 1970 18) Abbreviated … [Read more...]
To EMP or Not to EMP… Is That the Question?
So what are our thoughts on the threat of an electromagnetic pulse event (God forbid) causing some sort of catastrophic damage to our telecommunications, power, and whatever other kind of electronic infrastructure that might be out there? I know, I know…it depends who you talk to! Being in the EMC business, I’d like to believe that I understand the fundamental issue (danger) … [Read more...]
New EMI Test Receiver Increases Speed of Precompliance Measurements
Rhode & Schwarz, a supplier of test and measurement, broadcasting, radiomonitoring and radiolocation equipment, has released the ESRP EMI test receiver for diagnostic and precomplance measurements in the frequency range of 10 Hz to 7 GHz. According to Rohde & Schwarz, the new EMI test receiver is “the ideal instrument for developers to employ in the early stages of … [Read more...]
Methods of Measurement and Limits for Radiated Disturbances from Plasma Display Panel TVs in the Frequency Range 150 kHz to 30 MHz
From the International Electrotechnical Commission Webstore: “IEC/PAS 62825:2013(E), which is a publicly available specification, applies to plasma display panel TVs which are intended for use in residential or commercial environments, which have a visible display area with a diagonal dimension of 1 m or greater, and which are within the scope of CISPR 13 or CISPR 32.” “This … [Read more...]
New EMC Vehicle Testing Facility Opens in Taiwan
An electromagnetic compatibility testing facility for vehicles has been opened at the Automotive Research and Testing Center in Lukang, Changhua County, Taiwan. According to the Republic of China (ROC) Ministry of Economic Affairs, the facility is capable of providing testing for components, systems and entire vehicles. The facility is equipped with a large anechoic chamber, a … [Read more...]
Testing Requirements for EMC-Unprotected Test and Measurement Circuits
IEC 61326-2-1:2012 specifies detailed test configurations, operational conditions and performance criteria for equipment with test and measurement circuits that are not EMC-protected for operational and/or functional reasons as specified by the manufacturer. This second edition constitutes a technical revision and cancels and replaces the first edition published in 2005. Learn … [Read more...]
Aerospace Test Application Added to EMC Test Software
Teseq, Inc., a developer of instrumentation and systems for EMC emission and immunity testing, has released a new aerospace test application for use in its Compliance 5 EMC test software. Compliance 5 enables users to store configuration and equipment details as well as construct specific tests while giving the administrator overall control of the program. The software is … [Read more...]
Washington State Takes Comments on Navy Electromagnetic Sensor Project
Washington residents can submit comments through Sept. 28 on a Navy project that would build electromagnetic sensors on the sea floor of Hood Canal by dredging 1.45 acres of sea floor off shore of Naval Base Kitsap. The public's comments will be included in a formal environmental assessment by the Navy. The sensors would read and record the electromagnetic signatures of Naval … [Read more...]
