Mobile radio for IMTS and MTS

This paper discusses the requirements, circuit descriptions, and construction of a mobile radio developed for application in the Improved Mobile Telephone System (IMTS). IMTS is a mobile radio system which provides automatic two-way dialing telephone service with automatic channel selection. The mobile subscriber stations simulate, as nearly as possible, the telephone equipment available to a wire-line subscriber. The mobile radio described is an eleven-channel, full duplex, continuous duty radio and includes many features developed especially for application to the mobile telephone service. In addition to the equipment discussion, the basic philosophies unique to the design of equipment for this application are also discussed.