Rectification method of EMC chamber monitor

In the electromagnetic compatibility test, some need to carry out under strong external electromagnetic environment, people can not be a close observation of the test items, in which an ordinary video monitor will also be a serious interference. This paper present a new set of EMC solutions through solving the video monitor interference within the band of 20 MHz - 200 MHz in the strong external electromagnetic environment, the design process was proposed by analyzing the causes interference, modeling and simulation, quantitative interference value; the interference and the shielding effectiveness that needed was get by calculation. This method changes the way that obtains the required shielding effectiveness by testing on the frequency point one by one. Through the test and verify, this approach is feasible. It shortens the test cycle and greatly improved efficiency.