Video transmission system for use with coaxial cable

摘要

A description is given of a video transmission system capable of transmitting 625-line monochrome television signals with very low distortion on coaxial-pair cable over distances of up to 25 miles, possibly extensible to more than 50 miles. Because power for intermediate repeaters is not fed over the coaxial-pair cables, the use of the system may be restricted under some circumstances. Special techniques are used for the reduction of hum and low-frequency interference and for the waveform correction of the coaxial-pair cable. The system is designed on a waveform basis with the minimum reference to steady-state characteristics.