Radiation disturbance is a component of EMI testing, mainly aimed at assessing whether the spatial radiation generated by EUT will affect other objects. During operation, EUT may emit radiation through space due to the operation of CUP or motor, which may affect the operation of other objects or the human body. Therefore, a radiation disturbance test is required.

The necessary equipment includes: testing site - anechoic chamber, receiver, antenna, coaxial cable, turntable, and testing table.

Ordinary products are divided into three categories:

One type is information technology and audio and video, using the standard EN55032;

The second category is household appliances, and the standard used is EN55014;

The third category is lighting fixtures, and the standard used is EN55015.

According to the standard regulations, the distance between the EUT and the antenna is 3 meters. The desktop equipment is placed on an insulated table of 0.8 meters, and the floor standing equipment room is placed on an insulated wooden board of 0.15 meters. During testing, the antenna is placed at corresponding locations of 1 meter, 2 meters, 3 meters, and 4 meters high, and the turntable rotates 360 degrees to find the maximum radiation point and observe whether it exceeds the specified limit range. The direction of the antenna is also divided into horizontal and vertical directions.

According to different product categories, the testing frequency and limit values may also vary. The testing range for lighting fixtures is from 30MHz to -300mHz, while the testing range for other ordinary products is from 30MHz to -1000MHz. The antenna used is a double cone periodic logarithmic antenna, and each test reading point must read 6 large values, which are determined by QP. Observation near the limit must take 15 seconds.