Cable Television in the United States

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CableLabs®

Cable Television in the United States
- An Overview by Walter S. Ciciora, Ph.D.

Cable Television Laboratories, Inc. 400 Centennial Parkway Louisville, Colorado 80027 Phone: 303/661-9100 FAX: 303/991-9199

DISCLAIMER This document is published by Cable Television Laboratories, Inc. ("CableLabs") to inform the industry. CableLabs reserves the right to revise this document for any reason including, but not limited to, changes in laws, regulations, or standards promulgated by various agencies; technological advances; or changes in equipment design, manufacturing techniques or operating procedures described or referred to herein. CableLabs makes no representation or warranty, express or implied, with respect to the completeness, accuracy or utility of the report or any information or opinion contained in the report. Any use or reliance on the information or opinion is at the risk of the user, and CableLabs shall not be liable for any damage or injury incurred by any person arising out of the completeness, accuracy or utility of any information or opinion contained in the report. This document is not to be construed to suggest that any manufacturer modify or change any of its products or procedures, nor does this document represent a commitment by CableLabs or any member to purchase any product whether or not it meets the described characteristics. Nothing contained herein shall be construed to confer any license or right to any intellectual property, whether or not the use of any information herein necessarily utilizes such intellectual property. This document does not constitute an endorsement of any product or company or the adoption or promulgation of any guidelines, standards, or recommendations.

© Cable Television Labs, Inc. 1995 All Rights Reserved. Printed May 25, 1995 Revised 2nd Edition

CableLabs®

Overview of Cable Television

Table of Contents
Section Page

1.0 Introduction .............................................................................................................1 1.1 Historical Perspective .......................................................................................1 1.2 Spectrum Re-use ...............................................................................................4 1.3 Cable Network Design ......................................................................................6 1.4 Signal Quality .................................................................................................11 1.5 Cable System Trade-offs .................................................................................13 1.6 Cable Economics ............................................................................................16 2.0 Technical Detail ....................................................................................................20 2.1 System Configurations and Trends .................................................................20 2.1.1 Channel Carriage Capacity ....................................................................20 2.1.2 Industry Trends ......................................................................................24 2.1.3 Channelization .......................................................................................25 2.2 Signal Transportation Systems .......................................................................26 2.2.1 AML and FML Microwave Links .........................................................26 2.2.2 Frequency Modulated Coaxial Trunk ....................................................27 2.2.3 Amplitude Modulated Coaxial Supertrunk ............................................27 2.2.4 Fiber Interconnect ..................................................................................28 2.3 Frequency Band Usage ...................................................................................29 2.3.1 Frequencies Under Regulation...
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