Video cable, RF coaxial cable, video cable SYV-75-3-41_安徽中盛电气集团有限公司官方网站

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产品名称：Video cable, RF coaxial cable, video cable SYV-75-3-41
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添加时间：2024-06-13 09:38:59
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YV75-5实芯聚乙烯绝缘聚氯乙烯护套射频同轴电缆：用于视频监控线路、会议视频等电子线路架设、工程装修讯号传输、影音器材连接以及其它电子装置，无线电通讯广播设备的有关无线电电子设备中传输射频信号。产品标准：(GB/T14864-1993)。

YV75-5 solid core polyethylene insulated polyvinyl chloride sheathed RF coaxial cable: used for the installation of electronic circuits such as video surveillance lines and conference videos, signal transmission in engineering decoration, connection of audio-visual equipment, and other electronic devices. It is also used for transmitting RF signals in related wireless electronic equipment of radio communication and broadcasting equipment. Product standard: (GB/T14864-1993).

结构：1:内导体单股或绞合多股，2:聚乙烯绝缘，3:铜丝编织网，4聚氯乙烯护套。

Structure: 1. Single or twisted inner conductor, 2. Polyethylene insulation, 3. Copper wire woven mesh, 4 PVC sheaths.

使用条件：1：使用温度（℃): -40～+60，2:相对温度:40℃时达98%，3:安装敷设温度不低如: -15℃，4:充许***小弯曲半径:室内不小于5倍,室外10倍

Usage conditions: 1. Operating temperature (℃): -40~+60, 2. Relative temperature: 98% at 40 ℃, 3. Installation and laying temperature not low, such as -15 ℃, 4. Minimum allowable bending radius: indoor not less than 5 times, outdoor 10 times

SYV75-2-1x8 （48编）技术参数：内导体结构：1/0.5mm；绝缘厚度：1.05mm，绝缘外径：3.0mm±0.13，屏蔽网数：64编，护套外径：5.1mm±0.2

SYV75-2-1x8 (48 series) Technical parameters: Inner conductor structure: 1/0.5mm; Insulation thickness: 1.05mm, insulation outer diameter: 3.0mm ± 0.13, number of shielding mesh: 64 braids, sheath outer diameter: 5.1mm ± 0.2

SYV75-2-1x8 （64编）技术参数：内导体结构：1/0.5mm；绝缘厚度：1.05mm，绝缘外径：3.0mm±0.13，屏蔽网数：96编，护套外径：5.1mm±0.2

SYV75-2-1x8 Technical parameters: Inner conductor structure: 1/0.5mm; Insulation thickness: 1.05mm, insulation outer diameter: 3.0mm ± 0.13, number of shielding mesh: 96 braids, sheath outer diameter: 5.1mm ± 0.2

SYV75-2-1x8 （96编）技术参数：内导体结构：1/0.5mm；绝缘厚度：1.05mm，绝缘外径：3.0mm±0.13，屏蔽网数：128编，护套外径：5.1mm±0.2

SYV75-2-1x8 Technical parameters: Inner conductor structure: 1/0.5mm; Insulation thickness: 1.05mm, insulation outer diameter: 3.0mm ± 0.13, number of shielding mesh: 128 braids, sheath outer diameter: 5.1mm ± 0.2

SYV75-2-2x8 （48编）技术参数：内导体结构：9/0.15mm；绝缘厚度：1.05mm，绝缘外径：3.0mm±0.13，屏蔽网数：64编，护套外径：5.1mm±0.2

SYV75-2-2x8 Technical parameters: Inner conductor structure: 9/0.15mm; Insulation thickness: 1.05mm, insulation outer diameter: 3.0mm ± 0.13, number of shielding mesh: 64 braids, sheath outer diameter: 5.1mm ± 0.2

SYV75-2-2x8 （64编）技术参数：内导体结构：9/0.15mm；绝缘厚度：1.05mm，绝缘外径：3.0mm±0.13，屏蔽网数：96编，护套外径：5.1mm±0.2

SYV75-2-2x8 (64 series) Technical parameters: Inner conductor structure: 9/0.15mm; Insulation thickness: 1.05mm, insulation outer diameter: 3.0mm ± 0.13, number of shielding mesh: 96 braids, sheath outer diameter: 5.1mm ± 0.2

SYV75-2-2x8 （96编）技术参数：内导体结构：9/0.15mm；绝缘厚度：1.05mm，绝缘外径：3.0mm±0.13，屏蔽网数：128编，护套外径：5.1mm±0.2

SYV75-2-2x8 (96 series) Technical parameters: Inner conductor structure: 9/0.15mm; Insulation thickness: 1.05mm, insulation outer diameter: 3.0mm ± 0.13, number of shielding mesh: 128 braids, sheath outer diameter: 5.1mm ± 0.2

同轴电缆的优点是可以在相对长的无中继器的线路上支持高带宽通信，而其缺点也是显而易见的：一是体积大，细缆的直径就有3/8英寸粗，要占用电缆管道的大量空间；二是不能承受缠结、压力和严重的弯曲，这些都会损坏电缆结构，阻止信号的传输；***后就是成本高，而所有这些缺点正是双绞线能克服的，因此在现在的局域网环境中，基本已被基于双绞线的以太网物理层规范所取代。

The advantage of coaxial cables is that they can support high bandwidth communication on relatively long lines without repeaters, but their disadvantages are also obvious: firstly, they have a large volume, and the diameter of thin cables is 3/8 inches thick, which takes up a lot of space in cable ducts; Secondly, it cannot withstand entanglement, pressure, and severe bending, which can damage the cable structure and prevent signal transmission; Finally, there is the high cost, and all these drawbacks can be overcome by twisted pair cables. Therefore, in today's LAN environment, Ethernet physical layer specifications based on twisted pair cables have basically replaced them.

目前，常用的同轴电缆有两类：50Ω和75Ω的同轴电缆。75Ω同轴电缆常用于CATV网，故称为CATV电缆，传输带宽可达1GHz，目前常用CATV电缆的传输带宽为750MHz。50Ω同轴电缆主要用于基带信号传输，传输带宽为1～20MHz，总线型以太网就是使用50Ω同轴电缆，在以太网中，50Ω细同轴电缆的***大传输距离为185米，粗同轴电缆可达1000米。

At present, there are two types of commonly used coaxial cables: 50 Ω and 75 Ω coaxial cables. 75 Ω coaxial cable is commonly used in CATV networks, hence it is called CATV cable, with a transmission bandwidth of up to 1GHz. Currently, the commonly used CATV cable has a transmission bandwidth of 750MHz. 50 Ω coaxial cable is mainly used for baseband signal transmission, with a transmission bandwidth of 1-20MHz. Bus type Ethernet uses 50 Ω coaxial cable. In Ethernet, the maximum transmission distance of 50 Ω thin coaxial cable is 185 meters, and thick coaxial cable can reach 1000 meters.

指实心聚乙烯绝缘的同轴电缆，国标代号是射频电缆——又叫“视频电缆”

Refers to solid polyethylene insulated coaxial cables, with the national standard code being RF cables - also known as "video cables"

一般所指的视频线为电视有线，也可用作安防领域的监控摄像头用线。

The video cable generally refers to television cable, which can also be used as a surveillance camera cable in the security field.

下面是一般视频线的参数

The following are the parameters of a general video cable

75代表阻抗性,后面的3和5代表它的绝缘外径(3mm/5mm)

75 represents impedance, and the following 3 and 5 represent its insulation outer diameter (3mm/5mm)

SYV中S---同轴射频电缆,Y---聚乙烯,V---聚氯乙烯.

S-coaxial RF cable in SYV, Y-polyethylene, V-polyvinyl chloride

SYV75-3传输在300米之内效果好.

SYV75-3 has good transmission performance within 300 meters

SYV75-5传输在800米内效果更好.

SYV75-5 performs better in transmission within 800 meters

75-3 传输距离 100米

75-3 transmission distance of 100 meters

75-5 传输距离 300米

75-5 transmission distance of 300 meters

75-7 传输距离 500--800米

75-7 transmission distance 500-800 meters

75-9传输距离 1000---1500米

75-9 transmission distance 1000-1500 meters

75-12传输距离 2000----3500米

75-12 transmission distance 2000-3500 meters

视频线和射频线的异同

The similarities and differences between video cables and radio frequency cables

[相同点]

[Similarities]

1. 特性阻抗一样――75 欧姆；

1. Same characteristic impedance -75 ohms;

2. 外层护套，屏蔽层结构，绝缘层外径，编数选择，材质选择，屏蔽层数等基本相同；

2. The outer sheath, shielding layer structure, outer diameter of insulation layer, number of braids, material selection, and number of shielding layers are basically the same;

[不同点]

[Differences]

1. 绝缘层物理特性不同

1. Different physical properties of the insulation layer

2. 芯线直径不同

2. Different core wire diameters

3. 上述两项根本区别，决定了两种电缆的传输特性――传输衰减不同

3. The fundamental difference between the above two factors determines the transmission characteristics of the two types of cables - different transmission attenuation

4. 高编电缆明显特点是：屏蔽层的直流电阻小，200KHz 以下的低频衰减少，对抑制低频干扰有利，从频率失真（高低频衰减差异）看，高编电缆反而严重。频率失真直接影响就是视频信号的各种频率成分的正常比例失真，直接影响到图像失真

4. The obvious feature of high braided cables is that the DC resistance of the shielding layer is small, and the low-frequency attenuation below 200KHz is reduced, which is beneficial for suppressing low-frequency interference. From the perspective of frequency distortion (difference in attenuation between high and low frequencies), high braided cables are more severe. Frequency distortion directly affects the normal proportional distortion of various frequency components of video signals, directly affecting image distortion

5. 铜包钢芯线：这是SYWV 电缆的一种，用于有线电视46MHz 以上的射频传输，0-200KHz 低频衰减太大。

5. Copper clad steel core wire: This is a type of SYWV cable used for RF transmission of cable TV above 46MHz, with significant low-frequency attenuation from 0-200KHz.