1) two-way HFC
双向HFC
1.
This article describes the four major components of two-way HFC network: network design,equipment selection,construction norms and system debugging.
阐述永春广电双向HFC网络建设中涉及的4个主要环节:网络设计要求、器材选型要求、工程施工规范以及系统调试方法,并通过双向业务网实际运行数据验证了双向HFC有线电视网络作为宽带业务运行平台的实用价值。
2.
How to reduce gathering noise becomes a main problem of two-way HFC building.
双向HFC网络上行系统具有多点汇聚到一点的特殊性,如何降低汇聚干扰噪声成为双向HFC网建设存在的主要问题,合理设置与正确调试对减轻网络的汇聚噪声干扰能起到显著的作用。
3.
Introduced the designing aim,step and method of two-way HFC network upstream channel,elaborated the design and debugging idea of patterning two-way HFC network upstream channel,So that returning channel works in high point.
介绍双向HFC网络上行通道的设计目标、步骤及方法 ,阐述模式化的双向HFC网上行通道的设计及调试理念 ,从而使回传通道工作在最佳状态。
2) bidirectional HFC net
双向HFC网
1.
Technological problems of the bidirectional HFC net in transmiting upwards and corresponding strategies;
双向HFC网上行传输的技术问题及对策
3) HFC two-way networks
HFC双向网
1.
The reform of HFC two-way networks-the best way to horizontally shift from simulated platform to digital platform;
HFC双向网改造是模拟平台向数字平台平移的最佳途径
4) two-way HFC network
双向HFC网络
1.
Adjustment to Return System of Two-way HFC Network;
双向HFC网络反向系统的调试
2.
This paper summarizes some understanding and experience of two-way HFC network design and transmission system debugging.
文章对双向HFC网络的设计和调试总结了一些粗浅的认识和经验。
3.
This paper introduces structure,character,main design and method of adjustment of CATV two-way HFC network.
系统介绍有线电视双向HFC网络的结构、特点、设计要点与调整方法。
5) bidirectional HFC network
双向HFC网络
1.
This paper introduces the functions, composition of the intelligent plot, and then discusses its implementation in CATV bidirectional HFC network.
介绍智能化小区系统的功能、组成,以及智能化小区在有线电视双向HFC网络中的具体实现。
6) HFC double-directions net
HFC双向网络
1.
According to the design principles of HFC double-directions net, the functions and technical targets of the frontier systems, light-chain circuits and the distributed systems were analyzed and calculated in detail.
根据HFC双向网络的设计原则,对其前端系统、光链路、分配系统的功能及技术指标进行了较为详尽的分析和计算,并提出了施工过程应注意的问题。
补充资料：Freon-152a，HFC-152a
分子式：CH3CHF2
CAS号：
性质：又称氟里昂-152a。常温常压下为无色气体，有乙醚味。沸点-24.7℃。凝固点-117℃。液体密度pL200.95g/cm3。折射率nD-721.3011。临界温度113.5℃，临界压力44.4×105Pa，临界密度0.365g/cm3。溶于有机溶剂，微溶于水，有麻醉神经作用。易燃、低毒。由偏氯乙烯与无水氟化氢反应或干燥乙炔和氟化氢在氟磺酸催化下加成反应制得。用作制冷剂(替代CFC-12)和其他制冷剂中间体、喷雾剂、发泡剂，还用作氟橡胶原料。
CAS号：
性质：又称氟里昂-152a。常温常压下为无色气体，有乙醚味。沸点-24.7℃。凝固点-117℃。液体密度pL200.95g/cm3。折射率nD-721.3011。临界温度113.5℃，临界压力44.4×105Pa，临界密度0.365g/cm3。溶于有机溶剂，微溶于水，有麻醉神经作用。易燃、低毒。由偏氯乙烯与无水氟化氢反应或干燥乙炔和氟化氢在氟磺酸催化下加成反应制得。用作制冷剂(替代CFC-12)和其他制冷剂中间体、喷雾剂、发泡剂，还用作氟橡胶原料。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条