How to quickly screen motion controller MCEMC pre-test?

EMC pre-testing of motion controllers (MCs) can quickly screen for potential problems, saving time and costs associated with formal certification. A simple pre-test environment should be established: set up a small conducted emission test bench in an office or laboratory, using a LISN and spectrum analyzer. Scan the PCB and cables using a near-field probe kit. Perform simple immunity checks, such as discharging ports with an ESD gun and coupling a handheld EFT generator to the cables.

Pre-testing should focus on: whether the conducted emissions from power ports have sufficient margin below limits; the near-field intensity of strong radiation sources such as clocks and switching power supplies; and the functional stability of critical interfaces under ESD/EFT. Although pre-testing conditions are not as rigorous as in a formal laboratory, they can identify most obvious problems. Making preliminary corrections based on the pre-test results before proceeding with formal testing can significantly improve the first-pass yield. Pre-testing is a crucial EMC quality control step in product development.