Electromagnetic Susceptibility (EMS)


EMS refers to the ability of an electronic device or system to maintain its intended functions and operate without performance degradation or failure when subjected to a specific electromagnetic interference (EMI) environment.


Main EMS Tests

  • ESD (Electrostatic Discharge): Simulates electrostatic interference triggered by physical contact between objects.
  • Surge: Simulates instantaneous high-voltage surges caused by outdoor lightning strikes or the switching of high-power equipment.
  • EFT (Electrical Fast Transient): Simulates continuous high-frequency pulse noise generated by electrical switching operations.
  • RS (Radiated Susceptibility): Evaluates the product’s capability to withstand airborne radio frequency (RF) wave interference.
  • CS (Conducted Susceptibility): Evaluates the product’s capability to withstand noise transmitted through power lines, signal lines, or other cabling.

Performance Criteria

Test results are not evaluated as a simple “Pass/Fail.” Instead, they are classified into four professional grades based on how the product recovers after experiencing interference:

  • Criteria A: The product operates completely normally both during and after the test, with zero performance degradation.
  • Criteria B: The product experiences temporary functional anomalies during the test but automatically recovers to normal operation once the test stops.
  • Criteria C: The product suffers a functional interruption during the test and requires a manual reboot to restore operation.
  • Criteria D: The product suffers direct hardware damage, resulting in irreversible failure.

Designed strictly in accordance with EMS standards, the MSW-V Series delivers exceptional electromagnetic compatibility (EMC) and noise immunity, ensuring optimal signal integrity even in complex test environments.

Supporting multi-channel switching (such as SPDT, SP4T, etc.) and automated testing, it is widely utilized in R&D laboratories, production line mass-testing, aerospace and military radar systems, as well as verification environments for wireless communication equipment.