ANSI/SCTE 23-1-2010 DOCSIS 1.1 Part 1 Radio Frequency Interface

An American National Standard. The Society of Cable Telecommunications Engineers (SCTE). 2010. 424 р. This document defines the radio-frequency interface specifications for high-speed data-over-cable systems. They were developed 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. Therefore two options for physical layer technology are included, which have equal priority and are not required to be inter-operable. One technology option is based on the downstream multi-programme television distribution that is deployed in North America using 6 MHz channelling, and supports upstream transmission in the region 5-42 MHz. The other technology option is based on the corresponding European multi-programme television distribution and supports upstream in the region 5-65 MHz