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Analysis and Measurement of CATV Drop Cable RF Leakage CATV引入电缆射频泄漏的分析与测量
Pub Date : 1979-10-01 DOI: 10.1109/TCATV.1979.285783
Kenneth L. Smith
The coupling of electromagnetic fields through CATV drop cables can be measured using the radiometer described in this paper. The theoretical analysis of this coupling, which began in 1934, is reviewed and the measurements agree with the predictions. Accordingly engineers can theoretically analyze and design coaxial cables. The measurements show that the different types of drop cables in use result in a large variation in coupling. The flexure measurements show that some cables would be expected to have 10 times longer flexure life than other types.
利用本文介绍的辐射计可以测量CATV引入电缆的电磁场耦合。对始于1934年的这种耦合的理论分析进行了回顾,测量结果与预测一致。因此,工程师可以从理论上分析和设计同轴电缆。测量结果表明,不同类型的引入电缆在使用中会导致耦合变化很大。弯曲测量表明,一些电缆的弯曲寿命预计是其他类型电缆的10倍。
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引用次数: 1
IEEE Transactions on Cable Television - Table of contents IEEE有线电视汇刊-目录
Pub Date : 1979-10-01 DOI: 10.1109/TCATV.1979.285779
Presents the table of contents for this issue of the periodical.
介绍这期期刊的目录。
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引用次数: 0
Gems From Other Streams 来自其他溪流的宝石
Pub Date : 1979-10-01 DOI: 10.1109/TCATV.1979.285781
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引用次数: 0
IEEE Broadcast, Cable and Consumer Electronics Society IEEE广播、电缆和消费电子学会
Pub Date : 1979-10-01 DOI: 10.1109/TCATV.1979.285780
Provides a listing of current staff, committee members and society officers.
提供现有工作人员、委员会成员和社会官员的名单。
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引用次数: 0
Microwave Integrated Circuit Module for an SHF to UHF Television Converter 用于SHF到UHF电视转换器的微波集成电路模块
Pub Date : 1979-10-01 DOI: 10.1109/TCATV.1979.285782
Chuichi Sodeyama;Keiro Shinkawa;Masao Kamimura;Kanji Yokoyama
The authors have developed an SHF (from 11.7 GHz to 12.2 GHz) to UHF television converter of new circuit structure using a microwave integrated circuit (MIC) module.
作者利用微波集成电路(MIC)模块开发了一种新电路结构的SHF(11.7GHz到12.2GHz)到UHF电视转换器。
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引用次数: 3
Extended Bandwidth Broadband Communications Systems Performance Up To 400 MHz 高达400 MHz的扩展带宽宽带通信系统性能
Pub Date : 1979-07-01 DOI: 10.1109/TCATV.1979.285794
Joseph P. Preschutti
A method of determining and comparing reach of broadband CATV systems using hybrid IC amplifiers is outlined. System design theory is given, and subsequent performance data projected and compared for systems operating at upper limit frequencies of 300, 320, 350 and 400 MHz, and carrying 35, 38, 43 and 51 television channels, respectively. Trunk station performance is expressed in terms of hybrid amplifier specifications and performance degradation factors. General design equations are presented, and from these, relative performance of a broad range of trunk spacings and channel loading conditions are determined. Specific spacings, cascades and reach for 350 and 400 MHz systems are suggested.
概述了一种使用混合IC放大器来确定和比较宽带CATV系统的覆盖范围的方法。给出了系统设计理论,并预测和比较了在上限频率300、320、350和400MHz下运行的系统以及分别承载35、38、43和51个电视频道的系统的后续性能数据。中继站性能用混合放大器规格和性能退化因子表示。给出了一般的设计方程,并根据这些方程确定了宽范围的主干间距和信道负载条件的相对性能。提出了350和400MHz系统的具体间距、级联和覆盖范围。
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引用次数: 2
IEEE Broadcast, Cable and Consumer Electronics Society IEEE广播、电缆和消费电子学会
Pub Date : 1979-07-01 DOI: 10.1109/TCATV.1979.285791
Provides a listing of current staff, committee members and society officers.
提供现有工作人员、委员会成员和社会官员的名单。
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引用次数: 0
An Advanced Micro Processor Based CATV Status Monitor System 一种先进的基于微处理器的有线电视状态监测系统
Pub Date : 1979-07-01 DOI: 10.1109/TCATV.1979.285795
B. S. Walker;T M. Alldread
The conventional methods of troubleshooting CATV trunk plant and monitoring system levels have to date been less than optimum; requiring a considerable amount of field testing and dependence on subscriber trouble reports. The need therefore exists for an automated status monitoring system on a large CATV system to readily pinpoint fault conditions and maintain a continuous and accurate record of transmission performance.
迄今为止,对CATV干线设备和监控系统级别进行故障排除的传统方法还不太理想;需要大量的现场测试并且依赖于订户故障报告。因此,需要一种大型CATV系统上的自动状态监测系统,以容易地确定故障条件并保持传输性能的连续和准确记录。
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引用次数: 2
Headend Signal Switching Techniques 头端信号切换技术
Pub Date : 1979-07-01 DOI: 10.1109/TCATV.1979.285793
James O. Farmer
Signal switching has been practiced in CATV headends as a means of achieving better utilization of a limited number of channels and for commercial deletion and non duplication substitution. In designing a headend switching system, several problems need to be addressed. A selection can be made between baseband and IF switching, each having advantages under certain conditions. Different types of hardware are available to implement switching operations, including mechanical switches and relays, and electronic switches. When multiple inputs or output are involved in a switching operation, differing methods may be employed to implement signal distribution, with the method selected affecting isolation, loss, and complexity.
信号交换已经在CATV头端中实践,作为实现有限数量信道的更好利用以及商业删除和非复制替代的手段。在设计头端交换系统时,需要解决几个问题。可以在基带和IF切换之间进行选择,在特定条件下,每种切换都具有优势。不同类型的硬件可用于实现开关操作,包括机械开关和继电器以及电子开关。当开关操作涉及多个输入或输出时,可以采用不同的方法来实现信号分布,所选择的方法会影响隔离、损耗和复杂性。
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引用次数: 0
Transmission System Evaluation for Two-Way Cable 双向电缆传输系统评估
Pub Date : 1979-07-01 DOI: 10.1109/TCATV.1979.285796
Giorgio Allora-Abbondi
The installation and operation of a two-way cable system in London, Ontario is discussed.
讨论了安大略省伦敦市双向电缆系统的安装和运行情况。
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引用次数: 0
期刊
IEEE Transactions on Cable Television
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