SCTE 22-1 2002

This document defines the radio-frequency interface specifications for high-speed data-over-cable systems. They were developed by Cable Television Laboratories (CableLabs) for the benefit of the cable industry, including contributions by operators and vendors from North America, Europe, and other regions.

There are differences in the cable spectrum planning practices adopted for different networks in the world. Thereforetwo options for physical-layer technology are included, which have equal priority and are not required to beinteroperable. One technology option is based on the downstream multi-program television distribution that isdeployed in North America using 6 MHz channeling, and supports upstream transmission in the region 5-42 MHz.The other technology option is based on the corresponding European multi-program television distribution andsupports upstream in the region 5-65 MHz. Although both options have the same status, the first option wasdocumented earlier and the second option introduced at a later time as an amendment, resulting in the documentstructure not reflecting this equal priority. The first of these options is defined in Sections 2, 4, 5, Appendix G, andAppendix C.1.1.1, whereas the second is defined by replacing the content of those sections with the content ofAppendix N. Correspondingly, [ITU-T.J. 83-B], [NCTA] and [SMS] apply only to the first option, and[EN 300 429] only to the second. Compliance with this document requires compliance with one or other of theseimplementations, not with both. It is not required that equipment built to one option shall inter-operate withequipment built to the other.

These optional physical-layer technologies allow operators some flexibility within any frequency planning, EMC andsafety requirements tha tare madated for their area of operation. For example, the 6 MHz downstream based optiondefined by Sections 2, 4, and 5 might be deployable within an 8 MHz channel plan. Compliance with frequencyplanning and EMC requirements is not covered by this specification and remains the operators responsiblity. In thisrespect, [FCC15], [FCC76] and [EIA-S542] are relevant to North America and [EN 50081-1], [EN50082-1],[EN 50083-2], [EN 50083-7], and [EN 50083-10] are relevant to the European Community.

Any reference in this document to the transmission of television in the forward channel that is not consistent with[EN 300 429] is outside the normative scope as only [EN 300 429] is used for digital multi-program TV distribution bycable in European applications.

Requirements for safety are outside the scope of the present document. Safety standards for European applicationsare published by the CENELEC.

Note 1: Examples of such CENELEC product safety standards are [EN 60950] and [EN 50083-1].

Note 2: For CENELEC safety categories of interfaces, see [EG 201 212].

Details

Published:

01/01/2002

ANSI:

ANSI Approved

Number of Pages:

220

File Size:

1 file , 840 KB