Understanding EMI Precompliance Testing
Larry Mirasol
Senior Sales Engineer, Division 1 Test and Measurement
Rohde & Schwarz
EMI precompliance testing is performed by the device manufactures, in their own labs and with their own equipment. The goal of precompliance testing is to discover potential issues earlier in the design cycle, thus increasing the probability of passing the formal compliance tests.
Formal compliance testing only yields “pass-fail” results and does not provide much insight into the causes for the failure. Precompliance testing, on the other hand, can be stopped at any time and the reasons for issues can be thoroughly analyzed, tested and debugged.
EMI debugging and analysis should be incorporated into the design process itself. If initial measurements do not reveal any serious issues, the equipment under test (EUT) moves into precompliance testing. In precompliance, the goal is to test the EUT in a way that most closely approximates the required compliance tests. If any of these precompliance tests are failed, the EUT moves back into the design / debugging phase, where any necessary changes can be made. Once precompliance tests have been successfully passed, the EUT then moves into full compliance testing at a lab or test house. Successfully passing the required compliance tests results in formal certification, allowing the device to be marketed and sold. If, however, the EUT fails any of the formal compliance tests, it moves back into precompliance testing and/or debugging to resolve any outstanding issues.
As part of the National Electrical, Electronics and Computer Engineering Conference (NEECECON 2024), this technical session is organized by the UP Electrical and Electronics Engineering Institute with the theme "National Development through Sustainable Industrialization."
NEECECON 2024 is co-located with the Advanced Science, Technology, and Innovation Convention (ASTICON) 2024, held from 18 to 19 July 2024 at the Novotel Manila Araneta City in Quezon City.
ASTICON 2024 showcased DOST-ASTI and UP EEEI's pioneering contributions to the ICT landscape while celebrating the partnerships that drive technological advancement and societal progress in the country.
For more info about the event, visit https://neececon2024.eee.upd.edu.ph.