Great news, borrowing 3D EM software to diagnose the performance of the automotive radiated emissions test fixture is a go! I have been given a contact at the 3D EM software house and things should pick up quickly after the contact returns from the EMC Europe show in Sweden. I am excited. Meantime ....The Annual IEEE EMC Show - Why Dresden?Leaving aside the European location … [Read more...]
Ta DAH!
At long last, Department of Defense Instruction 3222.01, the DoD Electromagnetic Environmental Effects Program, has been signed and released. For those of you following along, its been a long road! See the post from Dec 2013.So, we have a new DoD E3 Instruction…what does that mean? First of all, as the title indicates, it's an Instruction, not a Directive – the difference is … [Read more...]
The Annual IEEE EMC Show – Why Dresden? Plus Proof of the Arbitrary Selection of Automotive Amplifier Harmonic Limits
Read other posts in the "Elephant in the Test Room" series here.It is looking good for using 3D software to diagnose the performance of the radiated emissions test fixture. Should get the go ahead any day now. Meantime, let’s explore this year’s hot topic. The Annual IEEE EMC Show - Why Dresden?It is no surprise that some USA residents in the EMC industry are wondering why the … [Read more...]
Determination of Practical Harmonic Levels
Well we are still waiting to see if borrowing 3D EM software is on the cards. I should know soon, one way or the other. I hope it happens, but for now let’s keep holding off on Elephant #3, ‘Fixing the Broken Automotive Test Fixture,’ In the meantime, we can continue the engineering approach on determining a practical level of harmonics in RF immunity for Elephant #2, … [Read more...]
Avoid the Most Common Failures with These 7 Essential EMC Design Rules
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 Continued – Determining Practical Harmonic Levels
Read other posts in the "Elephant in the Test Room" series here.At the time of writing, I am waiting to see if borrowing 3D EM software is on the cards, so let’s postpone progress on Elephant #3 for the time being. I'm quite excited at the prospect of modeling the present automotive emissions test fixture, and equally important, modeling the proposed improvements. In the … [Read more...]
A Report from the Southeastern Michigan EMC Fest
I recently attended the Southeastern Michigan EMC Fest, so this posting is dedicated to the show. I have a lot of admiration for Scott Lytle (Chapter Chair) and the Southeastern Michigan chapter he runs, so I decided to attend this year’s EMC Fest. The key attraction was Doug Smith, who gave attendees the benefit of his wisdom on diagnosing automotive EMC issues.The … [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...]
Elephant in the Test Room #3 – Fixing the Broken Automotive Emissions Test Fixture
Read other posts in the "Elephant in the Test Room" series here.Please note, regarding the fate of Elephant #2 – ‘Disharmony in Harmonic Limits’, it has now fallen under the umbrella of ‘Linearization of EMC Amplifiers’ and will be alluded to again during the part of the design exercise that determines practical harmonic levels. And so, with no further ado, onto a whole new … [Read more...]
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