Technical Considerations for Operating Systems Expanded to Fifty or More Television Channels

Abstract

Many CATV systems built in the last six or seven years took advantage of the 300 MHz equipment available from suppliers to the industry, and operators planned their layouts to allow for the ultimate carriage of thirty-five television channels. The improved signal handling capability of hybrid IC's and the "quad" circuit, together with larger and more efficient coaxial cables, kept pace with this increased channel loading. Improved system layout approaches, such as hubbing - in conjunction with the use of AML for hub interconnect - were tools used by the CATV operator to deliver quality pictures to their subscribers. Few took advantage of the subjective performance benefits available from phase lock.