有线电视共用天线系统安装工艺标准（Installation standard of CATV common antenna system）.docVIP

下载本文档

1
0
约2.75万字
约 29页
2017-09-23 发布于河南
举报
版权申诉

有线电视共用天线系统安装工艺标准（Installation standard of CATV common antenna system）.doc

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

有线电视共用天线系统安装工艺标准（Installation standard of CATV common antenna system）

有线电视共用天线系统安装工艺标准（Installation standard of CATV common antenna system） Installation standard of CATV common antenna system 1, scope of application This standard applies to cable television, satellite TV, closed-circuit television and common antenna system installation works. 2 、 construction preparation 2.1 materials The selection of receiving antenna for 2.1.1 CATV system shall be based on different receiving channels, receiving satellites, field strength and receiving rings As well as cable TV system facilities, scale selection, open circuit antenna and satellite antenna, to meet the requirements of receiving image quality, and Have product qualification certificate. 2.1.2 all kinds of iron parts should be galvanized. Corrosion treatment shall be carried out when galvanizing is not allowed. Such as the use of wire and 8# Steel wire rope and all kinds of iron pipes, angle iron, channel steel, flat iron, round steel, 14# tie wire, wire rope card, flower basket bolt, pull ring Zinc plating shall be adopted for equal treatment. All kinds of machine screws, metal expanding bolts, wood screws, washers, spring mats and so on should be galvanized. The 2.1.3 user terminal box is the port that the system connects with the user television set, and the user terminal box is divided into the bright and the dark boxes Plastic box two. User terminal panel socket, single hole and double hole socket, socket impedance is 75, and should have products Certificate。 2.1.4 TV cable shall have a high performance PE foam cable with good shielding performance. It is composed of coaxial inner and outer conductor groups The product has a characteristic impedance of 75 ohms and shall have a product qualification certificate. Double shielded cables may be used to interfere with the site environment; For the overhead cable, the self-supporting cable shall be adopted, and the outdoor cable shall be made of black sheath cable. 2.1.5 branch, distributor and other passive components: according to the