Digital Drop Testing: What Constitutes Breakage? (1996)

By Ernest Tsui, Applied Signal Technology Inc.

The introduction of digital signals to the cable industry is inevitable-with digital technology you have higher quality transmission, increased channel capacity (more revenue), and ultimately lower costs (via VLSI integration) than analog. These benefits, however, come at a cost: the cost to properly install, maintain, and troubleshoot a complex digital communication system running over a largely non-engineered subscriber premises wiring system and a drop system that can be unintentionally "invaded" by subscriber activities. This paper introduces the key test and maintenance procedural differences between analog and digital signal transmission and the "link breakage" performance differences, as well.

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