A review of radio interference investigation

Development of radiobroadcasting and reception has been paralleled by development and extensive use of devices that may cause interference with reception. The purpose of this paper is to review several factors of particular interest to the electric utilities, who supply service to both the radio and many of the interference sources. A relatively new form of interference effect — external cross modulation — is described. In conclusion, a parallel is drawn to the familiar co-ordination activities on wired communication lines and electric power systems.