RF co-site interference occurs when two or more co-located RF systems affect one another’s smooth operation. This normally occurs when two or more RF systems are operating physically close to one another and they are operating in such a way that one of the transmitters negatively impacts one or more receivers. This document explains you the workflow and includes an exercise following the steps to solve a co-site interference problem from the creation of the transmitters, receivers and antennas, through the stations and coupling loss matrices, and to the analysis.