Equalization of coaxial lines

EQUALIZATION of coaxial lines for television service involves requirements more severe than those which apply for telephone service. Level variations throughout the transmission band must be smaller for television transmission, and the delay distortion, which presents no serious problem in the broad-band system used for telephone service, must be equalized. This delay distortion within the transmitted band arises primarily from gain cutoff outside the band and thus usually is of a broad nature. The magnitudes, however, are such that a high degree of precision is needed to meet television requirements.