NDLI: Proofing and Maintaining Upstream Cable Plant with Digital Signal Analysis Techniques

Content Provider	IEEE Xplore Digital Library
Author	Williams, Thomas H.
Copyright Year	1997
Description	Author affiliation: Holtzman Engineering, 6423 Fairways Dr. Longmont CO. 80503, Tel: (303) 449-9070 E-mail: t.wil1iams@internetMCI.com (Williams, Thomas H.)
Abstract	The deployment of upstream (or reverse) hybrid fiber coax (HFC) cable service is inherently more difficult than downstream cable service for a number of reasons. Traditional tools for maintaining the upstream plant have been similar to the tools used for downstream maintenance: sweep transmitters, sweep receivers, spectrum analyzers, and signal level meters. This equipment is typically unable to accurately capture the high speed impulsive impairments that frequently impair the return transmissions. Additionally, the upstream transmissions are frequently high-speed data packets, which are difficult to capture and analyze with traditional test equipment. This paper discusses the test and maintenance needs of the reverse plant, as well as a set of non-traditional burst-mode tests. In particular, the low frequency range of the return systems (5-40 MHz.) makes it possible to use high-speed digital circuits to generate test and diagnostic signals, and high-speed analog to digital (A-D) converters can capture test and data signals for analysis. A low cost personal computer, located at the headend, can easily perform the numerical processing and format the display of the captured data.
Starting Page	7
Ending Page	18
File Size	784288
Page Count	12
File Format	PDF
ISBN	0780356861
DOI	10.1109/ARFTG.1997.327204
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-06-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal analysis Circuit testing Hybrid fiber coaxial cables System testing Optical fiber cables Optical fiber devices Coaxial cables Transmitters Spectral analysis Test equipment
Content Type	Text
Resource Type	Article

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