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- 產(chǎn)品名稱：Video cable, RF coaxial cable, video cable SYV-75-3-41
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- 添加時(shí)間：2024-06-13 09:38:59
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YV75-5實(shí)芯聚乙烯絕緣聚氯乙烯護(hù)套射頻同軸電纜 ：用于視頻監(jiān)控線路、會(huì)議視頻等電子線路架設(shè)、工程裝修訊號(hào)傳輸、影音器材連接以及其它電子裝置，無(wú)線電通訊廣播設(shè)備的有關(guān)無(wú)線電電子設(shè)備中傳輸射頻信號(hào)。產(chǎn)品標(biāo)準(zhǔn)：(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).
結(jié)構(gòu)：1:內(nèi)導(dǎo)體單股或絞合多股，2:聚乙烯絕緣，3:銅絲編織網(wǎng)，4聚氯乙烯護(hù)套。
Structure: 1. Single or twisted inner conductor, 2. Polyethylene insulation, 3. Copper wire woven mesh, 4 PVC sheaths.
使用條件：1：使用溫度（℃): -40～+60，2:相對(duì)溫度:40℃時(shí)達(dá)98%，3:安裝敷設(shè)溫度不低如: -15℃，4:充許***小彎曲半徑:室內(nèi)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編）技術(shù)參數(shù)：內(nèi)導(dǎo)體結(jié)構(gòu)：1/0.5mm；絕緣厚度：1.05mm，絕緣外徑：3.0mm±0.13，屏蔽網(wǎng)數(shù)：64編，護(hù)套外徑：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編）技術(shù)參數(shù)：內(nèi)導(dǎo)體結(jié)構(gòu)：1/0.5mm；絕緣厚度：1.05mm，絕緣外徑：3.0mm±0.13，屏蔽網(wǎng)數(shù)：96編，護(hù)套外徑：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編）技術(shù)參數(shù)：內(nèi)導(dǎo)體結(jié)構(gòu)：1/0.5mm；絕緣厚度：1.05mm，絕緣外徑：3.0mm±0.13，屏蔽網(wǎng)數(shù)：128編，護(hù)套外徑：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編）技術(shù)參數(shù)：內(nèi)導(dǎo)體結(jié)構(gòu)：9/0.15mm；絕緣厚度：1.05mm，絕緣外徑：3.0mm±0.13，屏蔽網(wǎng)數(shù)：64編，護(hù)套外徑：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編）技術(shù)參數(shù)：內(nèi)導(dǎo)體結(jié)構(gòu)：9/0.15mm；絕緣厚度：1.05mm，絕緣外徑：3.0mm±0.13，屏蔽網(wǎng)數(shù)：96編，護(hù)套外徑：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編）技術(shù)參數(shù)：內(nèi)導(dǎo)體結(jié)構(gòu)：9/0.15mm；絕緣厚度：1.05mm，絕緣外徑：3.0mm±0.13，屏蔽網(wǎng)數(shù)：128編，護(hù)套外徑：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
同軸電纜的優(yōu)點(diǎn)是可以在相對(duì)長(zhǎng)的無(wú)中繼器的線路上支持高帶寬通信，而其缺點(diǎn)也是顯而易見的：一是體積大，細(xì)纜的直徑就有3/8英寸粗，要占用電纜管道的大量空間；二是不能承受纏結(jié)、壓力和嚴(yán)重的彎曲，這些都會(huì)損壞電纜結(jié)構(gòu)，阻止信號(hào)的傳輸；***后就是成本高，而所有這些缺點(diǎn)正是雙絞線能克服的，因此在現(xiàn)在的局域網(wǎng)環(huán)境中，基本已被基于雙絞線的以太網(wǎng)物理層規(guī)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，常用的同軸電纜有兩類：50Ω和75Ω的同軸電纜。75Ω同軸電纜常用于CATV網(wǎng)，故稱為CATV電纜，傳輸帶寬可達(dá)1GHz，目前常用CATV電纜的傳輸帶寬為750MHz。50Ω同軸電纜主要用于基帶信號(hào)傳輸，傳輸帶寬為1～20MHz，總線型以太網(wǎng)就是使用50Ω同軸電纜，在以太網(wǎng)中，50Ω細(xì)同軸電纜的***大傳輸距離為185米，粗同軸電纜可達(dá)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.
指實(shí)心聚乙烯絕緣的同軸電纜，國(guó)標(biāo)代號(hào)是射頻電纜——又叫“視頻電纜”
Refers to solid polyethylene insulated coaxial cables, with the national standard code being RF cables - also known as "video cables"
一般所指的視頻線為電視有線，也可用作安防領(lǐng)域的監(jiān)控?cái)z像頭用線。
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 一般視頻線的參數(shù)
The following are the parameters of a general video cable
75代表阻抗性,后面的3和5代表它的絕緣外徑(3mm/5mm)
75 represents impedance, and the following 3 and 5 represent its insulation outer diameter (3mm/5mm)
SYV中S---同軸射頻電纜,Y---聚乙烯,V---聚氯乙烯.
S-coaxial RF cable in SYV, Y-polyethylene, V-polyvinyl chloride
SYV75-3傳輸在300米之內(nèi)效果好.
SYV75-3 has good transmission performance within 300 meters
SYV75-5傳輸在800米內(nèi)效果更好.
SYV75-5 performs better in transmission within 800 meters
75-3 傳輸距離 100米
75-3 transmission distance of 100 meters
75-5 傳輸距離 300米
75-5 transmission distance of 300 meters
75-7 傳輸距離 500--800米
75-7 transmission distance 500-800 meters
75-9傳輸距離 1000---1500米
75-9 transmission distance 1000-1500 meters
75-12傳輸距離 2000----3500米
75-12 transmission distance 2000-3500 meters
視頻線和射頻線的異同
The similarities and differences between video cables and radio frequency cables
[相同點(diǎn)]
[Similarities]
1. 特性阻抗一樣――75 歐姆；
1. Same characteristic impedance -75 ohms;
2. 外層護(hù)套，屏蔽層結(jié)構(gòu)，絕緣層外徑，編數(shù)選擇，材質(zhì)選擇，屏蔽層數(shù)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;
[不同點(diǎn)]
[Differences]
1. 絕緣層物理特性不同
1. Different physical properties of the insulation layer
2. 芯線直徑不同
2. Different core wire diameters
3. 上述兩項(xiàng)根本區(qū)別，決定了兩種電纜的傳輸特性――傳輸衰減不同
3. The fundamental difference between the above two factors determines the transmission characteristics of the two types of cables - different transmission attenuation
4. 高編電纜明顯特點(diǎn)是：屏蔽層的直流電阻小，200KHz 以下的低頻衰減少，對(duì)抑制低頻干擾有利，從頻率失真（高低頻衰減差異）看，高編電纜反而嚴(yán)重。頻率失真直接影響就是視頻信號(hào)的各種頻率成分的正常比例失真，直接影響到圖像失真
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. 銅包鋼芯線：這是SYWV 電纜的一種，用于有線電視46MHz 以上的射頻傳輸，0-200KHz 低頻衰減太大。
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.
