Complex EMI in practice
In a practical EMI situation all the elementary couplings discussed above coexist in a complex combination. A simple example of an automation system (Figure 18) shows that all the couplings apply to a single system in contact with its environment at the same time.
Any single system is embedded in a network of other systems and together they form a system of complex mutual EMI interrelations. To guarantee a proper functioning of the whole system, a so-called EMC matrix has to be generated and evaluated in the planning process for both new and refurbished buildings.