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Re: Cable Modems on HAM bands?



Cable Television Laboratories, Inc. (CableLabsĂ), founded in 1988 by members
of the cable television industry, is a non-profit research and development
consortium that is dedicated to pursuing new cable telecommunications
technologies and to helping its cable operator members integrate those
technical advancements into their business objectives.

The CableLabsĂ Certified˘ Cable Modem project, also known as DOCSISĂ (Data
Over Cable Service Interface Specification), defines interface requirements
for cable modems involved in high-speed data distribution over cable
television system networks.
The certified cable modem project provides cable modem equipment suppliers
with a fast, market-oriented method for attaining cable industry
acknowledgment of DOCSIS compliance and has resulted in high-speed modems
being (independently) certified for retail sale.

Here is the DOCSIS Specification
http://www.cablemodem.com/specifications/

I would recommend starting with the DOCSIS 1.1 RF Interface specification
http://www.cablemodem.com/downloads/specs/SP-RFIv1.1-I09-020830.pdf

Motorola's SB4220 Cable Modem
http://www.gi.com/catalog/product_documents/SB4220_Aug02.pdf

73 de Greg
w9gb
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