Dr Art

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Dr Art

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  • 09.19.2016
  • 10 interesting products from IEEE EMC 2016
  • For example EMF 2013/35/EU from 26 de Junio de 2013. The Directive in Europe must be applied in Europe from July 1st, 2016 (this year). The general idea is that companies where dangerous electromagnetic fields are present must apply some protection techniques for workers.
  • 06.23.2016
  • Near-field scanners let you see EMI
  • Dear Walt. I supposse you are interested in far field prediction from scanner near field measurements. I know EMSCAN offers a software to do that prediction. I can not comment about this, no experience from my part. I know this is a difficult subject. In EMSCAN website you will find measurements in a chamber compared with that predictions for some examples: http://www.emscan.com/emxpert/EMx_precompliancetesting.cfm http://www.emscan.com/downloads/EMxpert/Brochure_Datasheet/EMxpert%20Datasheet%20FF.pdf I would like to try this in the future.
  • 06.23.2016
  • Near-field scanners let you see EMI
  • Definitely, NO. With the TEM cell you have the possibility to test how are the emissions from the small DUT placing the board inside the cell and receiving the emissions in the terminal RF connector to visualize in your spectrum analyzer. This is useful to have an idea about how big and at what frequencies you have emissions. With the SCANNER you are monitoring the activity of the board so you will be able to see what frequencies are in your product (as with the tem cell) but WHERE THEY ARE. For example, you can locate a parasitic oscillation in a reset circuit, a decoupling circuit that is not working as expected (see my example in this blog) or a problem in a slot in your ground. You can do this with high precision in position (mm). Is clear my response?.
  • 06.23.2016
  • Near-field scanners let you see EMI
  • Yes, that is other different and nice scanner. I have no experience with the Detectus scanner (I have seen it in some exhibits). I know that, with Detectus scanner you have ONE probe that is moved around the board while with EMSCAN you have MANY probes under the PCB measuring "at the same time" (obviously with the small switching time between probes). The important thing is to have an image of what is happening in the board!.
  • 06.23.2016
  • Near-field scanners let you see EMI
  • Excellent!. Let me know if you need any aditional information about your application if you think I can give you some advice about the possibilities/limitations of the scanning process. My email is: a.mediano@ieee.org.
  • 06.23.2016
  • Near-field scanners let you see EMI
  • Yes, it is very useful. I am evaluating one of this scanners in my lab. The scanner has many many small loops and you can obtain a realtime picture of the activity in the board. This is very useful to understand what is happening on top of the scanner or to compare different designs or solutions. If you are interested in the product I suggest you to contact with EMSCAN. I will be glad to help you if you have any question about your application. Thanks for asking!!!!!