Before beginning our study of electromagnetic interference (EMI) and electromagnetic compatibility (EMC) we need to lay down a few fundamentals. We need to know these things in order to diagnose and eliminate the problems in equipment.
The fundamental causes of EMI problems can be broken into three categories:
1. Fundamental overload
3. Spurious emissions from a transmitter
Fundamental overload is overload of the affected equipment by the transmitter’s fundamental frequency. The overload may be on-channel or off-channel (or channels may not be involved at all!). The susceptible equipment must be able to do two things: ...