Transmission of Color over Inter-City Television Networks

The advent of television broadcasting in color, in accordance with the standards proposed by the NTSC, will require the application of new techniques and instrumentalities to the network channels which transmit television signals throughout the country. The extent of today´s television networks and their continuing growth makes this a job of considerable magnitude. The transmission requirements of NTSC color signals are more stringent than those of monochrome, because additional information is carried in the same video frequency band. The need for closer control is at the upper end of the video frequency band, where the color subcarrier is placed. It appears that additional gain and delay equalizers will be required on all channels and periodic tests and adjustments will have to be substantially increased. On coaxial cable systems, special frequency translators will be needed to shift the color information to frequencies within the coaxial passband.