Under the condition of not affecting its performance, adjust equipment cable trend and arrangement appropriately; make the different types of cables isolated from each other. Change the ordinary cables of small-signal or high-frequency signal to shielded cable, change the general large current signal or data transmission signal cable to symmetric stranded wire cable.
Strengthen the mechanical properties of grounding, and reduce the grounding resistance. Meanwhile, for the whole equipment there should be the separated low impedance grounding. Add the installation of power filter or cascade it to the equipment power input line. If possible, the important devices have to be shielded, isolated, for example, adding the installation of metal isolation plate which has good grounding or small shielding cover can be installed.
Paralleling a small capacitance at the power input end of each device in order to avoid the high frequency interference from bypass power.
Next, we respectively talk about some commonly occurred problems of the electronics, electrical products when they are in the process of EMC test. For instance, conducted emission, radiation emission, harmonic current (Harmonic Analyzer), electrostatic discharge (Electrostatic Discharge Simulator), electrical fast pulse, and surging (Surge Generator).
According to the characteristics of each project, we can divide all the testing projects into three categories and discuss them respectively. They are: electromagnetic disturbance emission category (There are conduction emission and radiation emission.), Harmonic current category, and Transient pulse immunity category (there are electrostatic discharge, electric rapid pulse, surge impact).