By the way, China's CCC certification mark with EMC letters after the EMC certification
When we watch TV, if someone next to the use of hairdryers or electric shavers and other household appliances, the screen will appear on the annoying snowflake streaks. Electric rice cooker can not cook rice, obviously turned off the air conditioner, after a while but then start their own ...... These are common to the phenomenon of electromagnetic interference. More seriously, electromagnetic interference signals can cause unimaginable consequences if they get in the way of medical electronic equipment that is monitoring a medical condition or an airplane that is in flight.
Electromagnetic compatibility (EMC) refers to the ability of a device or system to operate in its electromagnetic environment in compliance with the requirements and not cause intolerable electromagnetic interference to any equipment in its environment. Therefore, EMC includes two aspects of the requirements: on the one hand, it refers to the normal operation of the equipment in the process of electromagnetic interference in the environment can not exceed a certain limit; on the other hand, it refers to the apparatus of the environment where the existence of electromagnetic interference with a certain degree of immunity, that is, electromagnetic sensitivity.
The so-called electromagnetic interference refers to any electromagnetic phenomenon that can degrade the performance of the equipment or system. And the so-called electromagnetic interference refers to the electromagnetic interference caused by the degradation of the performance of the equipment or system.
EMC includes EMI (Electromagnetic Interference) and EMS (Electromagnetic Survivability) two parts, the so-called EMI electromagnetic interference, is the machine itself in the process of the implementation of due function in the process of generating electromagnetic noise is not conducive to other systems; and EMS is the machine in the process of the implementation of the due function is not subject to the influence of the surrounding electromagnetic environment ability.