Kusiyana kwake ndi chiyani: OM3 vs OM4?
M'malo mwake, kusiyana pakati pa OM3 vs OM4 fiber ndikungopanga chingwe cha fiber optic.Kusiyanaku kumatanthawuza kuti chingwe cha OM4 chimakhala chochepetsera bwino ndipo chimatha kugwira ntchito pama bandwidth apamwamba kuposa OM3.Nchifukwa chiyani izi?Kuti ulalo wa ulusi ugwire ntchito, kuwala kochokera ku VCSEL transceiver kumakhala ndi mphamvu zokwanira kufikira wolandila kumapeto kwina.Pali zikhalidwe ziwiri zogwirira ntchito zomwe zingalepheretse izi - kuwala kwa kuwala ndi kufalikira kwa modal.
Attenuation ndikuchepetsa mphamvu ya siginecha yowunikira pamene ikufalitsidwa (dB).Attenuation imayamba chifukwa cha kutayika kwa kuwala kudzera m'zigawo zongokhala, monga zingwe, zolumikizira chingwe, ndi zolumikizira.Monga tafotokozera pamwambapa zolumikizira ndizofanana kotero kusiyana kwa magwiridwe antchito mu OM3 vs OM4 kuli pakutayika (dB) mu chingwe.OM4 CHIKWANGWANI chimayambitsa kutayika kochepa chifukwa cha kapangidwe kake.Kuchepetsa kwakukulu komwe kumaloledwa ndi miyezo ikuwonetsedwa pansipa.Mutha kuwona kuti kugwiritsa ntchito OM4 kumakupatsani zotayika zochepa pa mita ya chingwe.Kutayika kwapansi kumatanthauza kuti mutha kukhala ndi maulalo ataliatali kapena kukhala ndi zolumikizira zolumikizana zambiri mu ulalo.
Kuchepetsa kwakukulu kumaloledwa pa 850nm: OM3 <3.5 dB/Km;OM4 <3.0 dB/Km
Kuwala kumafalikira mosiyanasiyana motsatira ulusi.Chifukwa cha kuperewera kwa ulusi, mitundu iyi imafika nthawi zosiyana pang'ono.Kusiyana kumeneku kukukulirakulira, pamapeto pake mumafika pomwe zomwe zikufalitsidwa sizingadziwike.Kusiyana kumeneku pakati pa mitundu yapamwamba kwambiri ndi yotsika kwambiri kumatchedwa modal dispersion.Kubalalika kwa modal kumatsimikizira bandwidth ya modal yomwe fiber imatha kugwira ntchito ndipo uku ndiko kusiyana pakati pa OM3 ndi OM4.Kutsika kwa kufalikira kwa ma modal, kumapangitsa kuti bandwidth ya modal komanso kuchuluka kwa chidziwitso chomwe chingapatsidwe.Ma modal bandwidth a OM3 ndi OM4 akuwonetsedwa pansipa.Ma bandwidth apamwamba omwe amapezeka mu OM4 amatanthawuza kufalikira kwakung'ono kwa modal ndipo motero amalola maulalo a chingwe kukhala otalikirapo kapena amalola kutayika kwakukulu kudzera pa zolumikizira zambiri.Izi zimapereka zosankha zambiri mukamayang'ana kapangidwe ka netiweki.
Bandwidth ya Chingwe Chochepa cha Fiber pa 850nm: OM3 2000 MHz·km;OM4 4700 MHz · Km
Sankhani OM3 kapena OM4?
Popeza kuchepetsedwa kwa OM4 ndi kotsika kuposa OM3 fiber ndi modal bandwidth ya OM4 ndipamwamba kuposa OM3, mtunda wotumizira wa OM4 ndi wautali kuposa OM3.
| Mtundu wa Fiber | 100BASE-FX | Mtengo wa 1000BASE-SX | 10GBASE-SR | 40GBASE-SR4 | 100GBASE-SR4 |
| OM3 | 2000 mita | 550 metres | 300 metres | 100 metres | 100 metres |
| OM4 | 2000 mita | 550 metres | 400 metres | 150 metres | 150 metres |
Nthawi yotumiza: Sep-03-2021