Grounding and Shielding Existing Equipment

How to effectively minimize EMI issues when best practices are not available Grounding and shielding is an often misunderstood process. It is common to hear quotes ranging from "it's just black art!" to "the rules change all the time!" and "there's no way to understand it!" These statements are often repeated but not true. There is a process, it hasn't changed, and the more one knows about coupling mechanisms the more one will see that it's sound engineering principals.