The CCIR considering a) that Recommendation 650 in Annex 1 recommends the use of multiplex analogue components systems D-MAC/packet and DZMAC/packet systems for satellite emission of TV, and gives the corresponding specifications; b) that Recommendation 787 recommends the HD-MAC/packet system for satellite emission of MACípacket- based compatible HDTV, and gives the corresponding specifications; c) that there is an urgent need to provide mean of distributing the TV signals received from these emissions in cable and community antenna systems; d) hat VSBIAM versions of the D-, D2- and HD-MAC systems intended for such distribution are specified internationally by, for example, the EBU in Tech. hblication 3258; e) that the RF characteristics of MAC AM-VSB cable receivers have been specified internationally in, for example, the European standard EN 50080; f) that VSB/AM D- and HD-MAC are optimized for distribution in 12 MHz channels; g) that VSB/AM D2-MAC is adapted for distribution in channels with a bandwidth of 8 MHz; h) that VSB/AM D2-MAC signais can also be conveyed with full quality in a 12 MHz channel; j) that a common channel raster would be of great advantage to facilitate the transition from MAC/packets to HD-M AC/packets; k) that so far few administrations have implemented the use of the band 300-470 MHz (also known as hyperband) for cable systems.