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目前通常使用的电缆电视系统在全频道系统中,最多只能传输13套节目。由于一些大的电缆电视系统和城镇电缆电视网,除了要传输电视台节目外,还要传输卫星电视节目和自办节目,13套节目就不够用。为此,北京电视设备厂克服一系列技术难关,在国内率先研制出 XQLQ12—B 型相邻频道用电缆电视前端设备,这套设备目前可传送12套电视节目,将来与该厂正在研制的增补频道系统兼容,可传输27套电视节目和一套调频
Currently used cable TV system in the whole channel system, can only transmit up to 13 sets of programs. Due to some large cable television systems and urban cable networks, in addition to the transmission of television programs, satellite television programs and self-running programs are also to be transmitted. 13 programs are not enough. To this end, Beijing Television Equipment Factory to overcome a series of technical difficulties in the country took the lead in the development of XQLQ12-B adjacent channel cable TV front-end equipment, this set of equipment can now send 12 sets of television programs in the future with the plant is being developed by the supplement Channel system is compatible, can transmit 27 sets of TV programs and a set of FM