Centralized testing of a very-high-frequency mobile radio system

In 1946 the Pacific Telephone and Telegraph Company made plans for the installation of its first mobile radio channel in the Los Angeles (Calif.) basin. Since this initial installation the area has evidenced an insatiable demand for this type of service. By the end of 1960 the telephone companies serving the area plan to have all available channels in service. Fig. 1 is a block schematic of a typical channel in the Los Angeles area.