Emcre margin requirements

Make sure to leave a margin of 3dB or 6dB. Generally, the test needs at least 3dB margin, because EMC is unstable and there are errors between different laboratories, so the more margin, the safer it is. EMC is a comprehensive consideration of the ability of an electronic engineer. The rectification process may involve all levels of structure, software and hardware, from chip level, board level to system level. The most common EMC problem is reradiation.