EMC (Electro-Magnetic Compatibility)

EMC made easy for you, by W-Boost

Every electronic device should work properly in any environment.  As the environment is an unknown, it might be a hazardous one, disturbed by electromagnetic interferers, affecting your product, which should work fine in all circumstances.  In addition, you product should be ‘clean’ (Interference-free), i.e. it should not affect the environment, and meet the essential requirements of various Directives, which refer to standards and test procedures.

It can be determined whether there is a regulatory requirement for your product in a specific target market. However, testing is a long term investment since EMC testing provides evidence that your product complies with relevant EMC regulations and directive(s). After a successful test program, you can be confident that your product’s reliability will be increased, thus reducing warranty issues and servicing costs, and encouraging brand loyalty. Testing also highlights potential issues or problems with the product that can be fixed before production.

For that, EMC (Electro-Magnetic Compatibility) describes these phenomena into 2 sections:

  1. EMI: Electromagnetic Interferences (Emission)
  2. EMS: Electromagnetic Susceptibility (Immunity)

Both of them contribute to the Electro-Magnetic Compatibility in various aspects:

  • RF Emission and immunity testing, from a few Hz up to 40 GHz
  • Transient Immunity Testing: Electrostatic Discharge (ESD), Electric Fast Transients (EFT, Burst), Surges,… Oscillatory waves, …
  • LF Immunity Testing: Voltage Dips, Interruptions, Variations, Magnetic field
  • Some special phenomena, like EMP (Electromagnetic Pulse), NEMP (Nuclear Electromagnetic Pulse), …

How to proceed?

  • It all starts with an EMC oriented (RF) design. Numerical methods and rules of common sense are combined with some in-house precompliance EMC testing. This to get a ‘feeling’ on the Electromagnetic behaviour of the EUT (Equipment-Under-Test)
  • In case of non-conformities, the EUT shall be modified, this is the EMC Troubleshooting phase: this is done by re-arranging cabling or re-routing PCB traces, applying filters (capacitors / coils and/or ferrites), improve the shield and grounding of the EUT etc…

EMI Precompliance

  • After that, the prototype or nearly finished product is tested in a (by preference accredited) EMC lab, having the right test equipment and infrastructure (anechoic chamber)
  • If everything is OK, the test reports allow you to issue a declaration of conformity, and bring the product onto the market or deliver it to the system integrator.

All this is done with respect to the applicable directives and standards, in various domains:

  • Civil testing: application of standards published by Cenelec (EN), IEC, CISPR, ETSI, FCC, …
  • Radiocommunication testing according to ETSI
  • Automotive testing acc. to ISO11452 / ISO7637, JASO, DIN, and manufacturer’s standards (GM, Ford, VW, BMW, Audi, …)
  • Military testing: MIL-STD461, DO-160, Tempest SDIP, …
  • Aerospace testing
  • Medical testing


Need EMC help?  W-Boost is your partner and…

  • will guide you through the labyrinth of standards
  • look for the most economic and reliable way to design, test and approve the EUT
  • give you the right advise on how to handle the ‘paperwork’
  • provides training on
    • All technical aspects
    • EMC fundamentals (required for EMC oriented design and troubleshooting)
    • Testing, from pre-compliance to full conformity

CE-marking_002  CE-Mark1


infoContact [email protected], +32 471 368 364

EMC Keywords: Electro-Magnetic Compatibility, Emission Testing, Immunity Testing, CE-Marking, Marking for Conformity, CISPR, EN, IEC, ETSI, MIL-STD, CENELEC, RTTE, Tempest