CE Testing includes EMC and LVD.And EMC is used to describe how well a device or system is able to function according to requirements in an electromagnetic environment without introducing electromagnetic disturbances that interfere with the operation of other electrical products in the environment. So, EMC has requirements on two issues:

1) It refers to the EMI generated to the environment by the device when this device functions regularly can not pass a certain data.

2) EMS (Immunity): The device has a certain degree immunity to the Electromagnetic Interference in the environment, i.e. susceptibility.