January 1968 | NTIA Technical Memo ERL TM ITS 128
Application of multiplex channels on FM and TV broadcast stations to educational needs
John J. Tary; T. Layne Livingston; Donald R. Macken
Abstract: Most radio systems are designed with bandwidths that are wider than necessary, resulting in wasteful use of the radio spectrum and failure to fully utilize the system capacity. This report reviews efforts to multiplex additional communications channels on FM and TV broadcast channels with possible applications to educational needs.
Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.