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EMC Engineering: Commonly-found EMI Diagnostic Equipment and Testbench: Probes



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Above: EMI Diagnostic Measurement Setup: Spectrum Analyzer, Preamplifier, Close-Field Probe

Do-It-Yourself Loop (H-Field) Probes -- a few examples


       

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How to make a simple loop probe


Above: A DIY loop probe. Get Electronic Parts and Accessories Ready to Ship Today

How to make a “Mini” loop probe


Above: Bend center conductor of a thin coax cable into a small loop and solder it to the braid. Then cover with silicon sealer.

Loop Probes you can buy


Above: Commercial probes are available many Internet sources. EMC probes allow the accurate measurement of magnetic and electric fields. They are useful for EMC troubleshooting, field strength measurement, and troubleshooting of RF circuits.

How to Map Hot (trouble) Spots on PCBs (printed circuit boards)

   
Above: LEFT: (top)1/2 inch magnetic field probe (used for course measurements) and (bottom) “Micro” magnetic field probe (used for fine measurements); RIGHT: Hot spots found on a common PC motherboard: examples include various crystal oscillators, processor chips; cable harmonics, PLL (phase lock loops), etc.

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Updated: Wednesday, 2007-10-03 1:44 PST