Nguwuphi umahluko: OM3 vs OM4?
Ngapha koko, umahluko phakathi kwe-OM3 vs OM4 ifayibha nje kulwakhiwo lwe-fiber optic cable.Umahluko kulwakhiwo uthetha ukuba ikhebula le-OM4 linokunciphisa okungcono kwaye linokusebenza kwi-bandwidth ephezulu kune-OM3.Siyintoni isizathu soku?Ukuze ikhonkco lefiber lisebenze, ukukhanya okuvela kwi-transceiver ye-VCSEL kunamandla aneleyo okufikelela kumamkeli kwelinye icala.Kukho amaxabiso amabini okusebenza anokuthintela oku-i-optical attenuation kunye ne-modal dispersion.
Ukuthotywa kukunciphisa amandla omqondiso wokukhanya njengoko usasazwa (dB).Ukuthotywa kubangelwa yilahleko ekukhanyeni kusetyenziswa amacandelo enziwayo, njengeentambo, iintambo zentambo, kunye nezihlanganisi.Njengoko kukhankanyiwe ngasentla iziqhagamshelo ziyafana ngoko umahluko wokusebenza kwi-OM3 vs OM4 kukulahleka (dB) kwintambo.I-OM4 fiber ibangela ilahleko ephantsi ngenxa yokwakhiwa kwayo.Ukuthotywa okuphezulu okuvunyelwe yimigangatho kuboniswe ngezantsi.Uyabona ukuba ukusebenzisa i-OM4 kuya kukunika ilahleko ephantsi ngemitha yentambo.Ilahleko esezantsi ithetha ukuba unokuba namakhonkco amade okanye ube neziqhagamshelo ezidibeneyo kwikhonkco.
Ukunciphisa okuphezulu kuvunyelwe kwi-850nm: OM3 <3.5 dB / Km;OM4 <3.0 dB/Km
Ukukhanya kuhanjiswa ngeendlela ezahlukeneyo ecaleni kwefiber.Ngenxa yokungafezeki kwifayibha, ezi ndlela zifika njengamaxesha ahluke kancinci.Njengoko lo mahluko usanda uye ufikelele kwinqanaba apho ulwazi oluthunyelwayo lungenako ukuchazwa.Lo mahluko phakathi kweyona ndlela iphezulu kunye neyona ndlela iphantsi waziwa ngokuba yimodal dispersion.I-modal dispersion inquma i-modal bandwidth enokuthi i-fiber isebenze kwaye lo ngumahluko phakathi kwe-OM3 kunye ne-OM4.Isezantsi i-modal dispersion, iphezulu i-modal bandwidth kunye nobuninzi bolwazi olunokudluliselwa.I-bandwidth ye-modal ye-OM3 kunye ne-OM4 iboniswe ngezantsi.I-bandwidth ephezulu ekhoyo kwi-OM4 ithetha i-modal dispersion encinci kwaye ngoko ivumela amakhonkco ekhebula ukuba abe nde okanye avumele ilahleko ephezulu ngokusebenzisa izixhumi ezidibeneyo.Oku kunika iinketho ezininzi xa ujonge uyilo lwenethiwekhi.
Ubuncinci be-Fiber Cable Bandwidth kwi-850nm: OM3 2000 MHz·km;OM4 4700 MHz·km
Khetha i-OM3 okanye i-OM4?
Ekubeni ukunyanzeliswa kwe-OM4 kuphantsi kwe-OM3 fiber kunye ne-modal bandwidth ye-OM4 iphezulu kune-OM3, umgama wokuhanjiswa kwe-OM4 ubude kune-OM3.
| Uhlobo lweFayibha | I-100BASE-FX | 1000BASE-SX | I-10GBASE-SR | 40GBASE-SR4 | 100GBASE-SR4 |
| OM3 | 2000 yeemitha | 550 yeemitha | 300 yeemitha | 100 yeemitha | 100 yeemitha |
| OM4 | 2000 yeemitha | 550 yeemitha | 400 yeemitha | 150 yeemitha | 150 yeemitha |
Ixesha lokuposa: Sep-03-2021