a though information gathering process will usually reveal the necessary clues to effectively narrow down the possible causes of the source of an EMI problem. for example, starting at the affected equipment, performing a few simple measurement can determine if radiated or conducted emission (or combination) are causing the problem. when you determine the primary type of emission involved, you many take more measurements inside and outside the facility to close in on the EMI source, whether it be a piece of equipment or an arcing component in a nearby power distribution network