18 - Cost effective uses of close field probing

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Updated for August 2020!

Cost-effective uses for near-field probing
in every project stage; for emissions, immunity, and more

This module has been completely revised for 2020 and has almost doubled in size.

This module is designed to help people understand Close-field EMC probing (often called near field probing). This is a useful qualitative method to quickly identify emissions problems.  It can quickly reveal weak points for immunity, when used with transient and/or radio-frequency (RF) generators and it can help design PCBs, shielding and much else.

Module is 174 slides over 87 pages


  • Near-Field Probing
  • Introduction to near-fields and near-field probing (= close-field probing)
  • Making our own near-field probes
  • Buying near-field probes
  • Affordable spectrum analyzers: traditional types and new ‘real-time’ types
  • Safety: the most important issue !
  • Using near-field probes to check emissions
  • Avoiding overload and intermodulation, including by out-of-band signals
  • Using near-field probes to check immunity
  • Some more uses for near-field probing
  • Using ‘Pin Probes’ to check emissions or immunity
  • RF Current Monitor Probing
  • Making current monitor probes
  • Buying current monitor probes
  • Using current monitor probes
  • Calibrating current monitor probes
  • Predicting radiated emissions on full-compliance tests
  • Quick and cost-effective uses for probing throughout the lifecycle
  • Some resources on probing, and on ‘pre-compliance’ testing



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