In order to solve the test background problem of intermediate frequency power supply in current market, Jiangsu REMC Electronic Technology Co., Ltd. built a shielded room and purchased test equipment such as receiver and LISN. In October 2020, after continuous testing, we successfully solved the test background problem of 400Hz power supply，CE101 /CE102.  The picture shows the test background for a 400Hz power supply with a current of 60A.