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Proceedings Paper

Operational issues in a two-way HFC environment
Author(s): Alex Mends-Cole
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Paper Abstract

The push to reduce system operating cost and increase performance in a traditional cable television tree-and-branch architecture has led system designers to pursue the hybrid fiber- coaxial (HFC) architecture as a viable solution. This solution, which joins the photonic world with radio frequency (rf) transmission, yields favorable results with respect to transporting analog video services. As a result, system operating enhancements such as improved carrier- to-noise ratios, improved carrier-to-distortion measurements, and fewer active components in cascade are possible. In addition, an enabling platform for the deployment of other two-way interactive services, facilitating duplex transmission, is successfully accomplished. In order to realize this network, there are some acute operational issues that need to be addressed. The picture quality problems of the past have been minimized. However, the thought of transporting telephony and other digitally formatted signals gives rise to other technical operating concerns. The adverse effects of impulse noise and ingress in the down and upstream paths of the HFC plant on digital signals and ancillary data services are described in this paper. Experimental data shows how these impairments affect network reliability from a technical operational context.

Paper Details

Date Published: 24 November 1995
PDF: 7 pages
Proc. SPIE 2609, Hybrid Fiber-Coax Systems, (24 November 1995); doi: 10.1117/12.227291
Show Author Affiliations
Alex Mends-Cole, Cable Television Labs., Inc. (United States)


Published in SPIE Proceedings Vol. 2609:
Hybrid Fiber-Coax Systems
Wai Sum Lai; Sam T. Jewell, Editor(s)

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