Xov Xwm Kev Lag Luam

Kev siv cov xwm txheej thiab qhov sib txawv ntawm Coaxial Cable & Ethernet Cable.

2021-03-03

Kev siv ntawm cov xwm txheej thiab qhov sib txawv ntawmCoaxial Cmuaj peev xwm & Ethernet Cmuaj peev xwm

 

 

1. Coaxial cmuaj peev xwm

 

Coaxial xaim hluav taws xobyog cov kab txuas nrog hauv nruab nrab tooj liab los ntawm qhwv hauv txheej ntawm cov kab hluav taws xob. Nws yog tus yam ntxwv zoo los cuam tshuam kev muaj peev xwm, ruaj khov cov ntaub ntawv xa mus, thiab tus nqi qis. Nws kuj tseem siv dav, xws li cov xov tooj cua kaw ua ke. Coaxial thin cmuaj peev xwms feem ntau muag ntawm ob peb yuan ib lub meter nyob rau hauv kev ua lag luam, uas tsis kim heev. Cov coaxial cmuaj peev xwm siv los txuas nrog BNC lub taub hau. Cov coaxial cmuaj peev xwm muag khoom hauv khw yog feem ntau cov khoom tiav tiav uas tau txuas nrog BNC lub taub hau. Koj tuaj yeem xaiv nws ncaj qha.

 

Txawm li cas los xij, raws li kev ntsuam xyuas ntawm cov yam ntxwv ntawm cov coaxial cmuaj peev xwm nws tus kheej, kev saib xyuas ntawm lub teeb liab thaum nws xa mus rau hauv cov coaxial cmuaj peev xwm muaj feem xyuam nrog kev sib kis thiab qhov zaus ntawm cov teeb liab nws tus kheej. Feem ntau hais lus, lub teeb liab ntau dua, ntau dua qhov xa ua. Qhov bandwidth ntawm lub teeb liab video yog loj heev, ncav 6MHz, thiab xim ntu ntawm cov duab yog raug hloov kho thaum qhov kawg siab ntawm qhov zaus. Nyob rau hauv txoj kev no, thaum lub teeb liab video xa mus rau hauv cov coaxial cmuaj peev xwm, tsis yog tsuas yog tag nrho cov teeb meem dav dav yog attenuated, tab sis kuj attenuation ntawm txhua zaus feem ntau sib txawv. , Tshwj xeeb tshaj yog cov xim attenuation yog qhov ntau tshaj plaws. Yog li ntawd, cov xov tooj coaxial tsuas yog tsim nyog rau kev sib kis luv luv ntawm lub cim xaib. Thaum qhov kev sib kis tau mus txog li 200 metres, cov duab zoo yuav raug txo kom tsawg, tshwj xeeb tshaj yog cov xim ua kom tsaus ntuj thiab muaj kev nkag siab ntawm qhov tsis sib xws.

 

Hauv kev ua haujlwm hauv engineering, txhawm rau kom txuas ntxiv qhov sib kis tau, siv lub tshuab coaxial amplifier. Lub coaxial amplifier tuaj yeem ua kom nrov ntawm lub teeb liab video rau qee yam, thiab tseem tuaj yeem them cov kev sib txawv ntawm cov sib txawv hauv ntau qhov sib txawv los ntawm kev kho kom sib luag, kom qhov cuam tshuam ntawm lub teeb liab video tso tawm los ntawm qhov kawg tau txais me me li sai tau. Txawm li cas los xij, coaxial amplifiers tsis tuaj yeem raug teeb meem tas mus li. Feem ntau, tsuas yog 2 mus rau 3 coaxial amplifiers tuaj yeem ua cascaded hauv lub kaw lus-taw qhia. Txwv tsis pub, qhov kis tau tus mob video tsis tuaj yeem lav thiab kho tau yooj yim. Yog li no, thaum siv cov xaim coaxial hauv ib qho kev soj ntsuam, txhawm rau kom ntseeg tau cov duab zoo dua, qhov kev sib kis tau yog qhov feem ntau kwv yees li plaub lossis tsib puas meters.

 

Tsis tas li, coaxial cmuaj peev xwms tseem muaj qee qhov kev tsis txaus nyob rau hauv kev xa cov duab xaib hauv kev soj ntsuam:

 

1. Covcoaxial cmuaj peev xwmnws tus kheej tau cuam tshuam ntau yam los ntawm kev hloov huab cua, thiab cov duab zoo tau cuam tshuam rau qee yam;

 

2. Cov coaxial cmuaj peev xwm tawg ntau dua, thiab cov xov hlau tsis yooj yim rau cov ntawv thov tuab xyuas;

 

3. Coaxial xaim hluav taws xob generally can only transmit video signals. If the system needs to transmit control data, audio and other signals at the same time, additional wiring is required;

 

4. Cov coaxial cmuaj peev xwm muaj peev xwm txwv tsis pub cuam tshuam txog qhov cuam tshuam thiab tsis tuaj yeem siv rau hauv kev cuam tshuam muaj zog;

 

5. Lub tshuab coaxial amplifier kuj muaj qhov tsis zoo ntawm qhov nyuaj hauv kev hloov kho.

 

II Twisted khub

 

Commonly used twisted khub cmuaj peev xwms are MIV5 Cmuaj peev xwms and MIV5E Cmuaj peev xwms, MIV6 Cmuaj peev xwms, and MIV7 Cmuaj peev xwms. The former has a thin cmuaj peev xwm diameter and the latter has a thick cmuaj peev xwm diameter. The models are as follows:

 

1.MIV5Etxoj sia hlau:Cov hom cmuaj peev xwm no tau nce winding ntom, txheej txheem lub rwb thaiv tsev zoo, thiab kis tau tus mob ntawm 100MHz. Nws yog siv rau lub suab sib kis thiab cov ntaub ntawv xa tawm nrog lub siab tshaj plaws kis ntawm 100Mbps. Nws yog tsuas yog siv rau 100BASE-T thiab 10BASE-T network. Qhov no yog cov kab feem ntau siv Ethernet cmuaj peev xwms.

 

2.MIV5E:

MIV5E has low attenuation, less crosstalk, higher attenuation-to-crosstalk ratio (ACR), signal-to-noise ratio (Structural Return Loss), smaller delay error, and performance Greatly improved. The maximum transmission rate of Super MIV5txoj sia hlau is 250Mbps.

 

3. MIV6 Cmuaj peev xwm: The transmission frequency of this type of cmuaj peev xwm is 1MHz~250MHz. The comprehensive attenuation crosstalk ratio (PS-ACR) of MIV6 wiring system should have a large margin at 200MHz, which provides 2 times that of MIV5 bandwidth. The transmission performance of MIV6 cabling is much higher than that of the Super MIV5 standard, and is most suitmuaj peev xwm for applications with a transmission rate higher than 1Gbps.

An important difference between MIV6 and MIV5 is that it improves the crosstalk and return loss performance. For the new generation of full-duplex high-speed network applications, excellent return loss performance is extremely important. The basic link model is cancelled in the six types of standards. The wiring standard adopts a star-shaped topology. The required wiring distance is: the length of the permanent link cannot exceed 90m, and the channel length cannot exceed 100m.

 

4. MIV6E cmuaj peev xwm: The MIV6Etxoj sia hlau is an improved version of the MIV6Etxoj sia hlau, which is also an unshielded twisted khub cmuaj peev xwm specified in ANSI/EIA/TIA-568B.2 and ISO MIV6/Class E standards. Mainly used in gigabit networks. In terms of transmission frequency, it is also 200-250 MHz like MIV6 lines, and the maximum transmission speed can also reach 1 000 Mbps, but it is greatly improved in terms of crosstalk, attenuation and signal-to-noise ratio.

 

MIV 5 and VII cmuaj peev xwm: This cmuaj peev xwm is the latest twisted khub in the ISO 7/F standard. It is mainly used to adapt to the application and development of 10 Gigabit Ethernet technology. But it is no longer an unshielded twisted khub, but a shielded twisted khub, so its transmission frequency can reach at least 500 MHz, which is more than twice that of MIV6 and MIV6Etxoj sia hlaus. Up to 10 Gbps.