Menene Bambancin: OM3 vs OM4?
A gaskiya ma, bambanci tsakanin OM3 vs OM4 fiber ne kawai a cikin ginin fiber optic na USB.Bambanci a cikin ginin yana nufin cewa kebul na OM4 yana da mafi kyawun attenuation kuma yana iya aiki a mafi girma bandwidth fiye da OM3.Menene dalilin hakan?Don hanyar haɗin fiber don aiki, hasken daga mai ɗaukar hoto na VCSEL yana da isasshen iko don isa ga mai karɓa a ɗayan ƙarshen.Akwai dabi'u biyu na aikin da za su iya hana wannan - attenuation na gani da watsawa.
Attenuation shine rage ƙarfin siginar haske kamar yadda ake watsa shi (dB).Ana haifar da attenuation ta hanyar hasara a cikin haske ta hanyar abubuwan da ba a iya amfani da su ba, kamar su igiyoyi, kebul na USB, da masu haɗawa.Kamar yadda aka ambata a sama masu haɗin haɗin suna ɗaya don haka bambancin aiki a OM3 vs OM4 yana cikin asarar (dB) a cikin kebul.OM4 fiber yana haifar da ƙananan asara saboda gininsa.Matsakaicin raguwar da aka ba da izini ta ma'auni ana nunawa a ƙasa.Kuna iya ganin cewa yin amfani da OM4 zai ba ku ƙananan asarar kowace mita na kebul.Ƙananan hasara na nufin cewa za ku iya samun dogon hanyoyin haɗin gwiwa ko samun ƙarin masu haɗa haɗin gwiwa a cikin hanyar haɗin.
Matsakaicin raguwa da aka yarda a 850nm: OM3 <3.5 dB/km;OM4 <3.0 dB/km
Ana watsa haske ta hanyoyi daban-daban tare da fiber.Saboda rashin lahani a cikin fiber, waɗannan hanyoyin suna zuwa kamar lokuta daban-daban.Yayin da wannan bambance-bambancen ke ƙaruwa, daga ƙarshe za ku isa wurin da ba za a iya yanke bayanan da ake watsawa ba.Wannan bambanci tsakanin mafi girma da mafi ƙasƙanci halaye an san shi da watsawar modal.Watsawa na modal yana ƙayyade bandwidth na modal wanda fiber zai iya aiki a ciki kuma wannan shine bambanci tsakanin OM3 da OM4.Ƙananan watsawa na modal, mafi girma da bandwidth na modal kuma mafi girman adadin bayanan da za a iya aikawa.Ana nuna bandwidth na modal na OM3 da OM4 a ƙasa.Mafi girman bandwidth da ake samu a cikin OM4 yana nufin ƙarami tarwatsewar modal kuma don haka yana ba da damar hanyoyin haɗin kebul su yi tsayi ko ba da damar asara mafi girma ta ƙarin masu haɗin haɗin gwiwa.Wannan yana ba da ƙarin zaɓuɓɓuka yayin kallon ƙirar hanyar sadarwa.
Mafi ƙarancin Fiber Cable Bandwidth a 850nm: OM3 2000 MHz · km;OM4 4700 MHz · km
Zaɓi OM3 ko OM4?
Tun da attenuation na OM4 ne kasa da OM3 fiber da kuma modal bandwidth na OM4 ne mafi girma fiye da OM3, watsa nisa na OM4 ya fi OM3.
| Nau'in Fiber | 100BASE-FX | 1000BASE-SX | 10GBASE-SR | 40GBASE-SR4 | 100GBASE-SR4 |
| OM3 | Mita 2000 | Mita 550 | Mita 300 | Mita 100 | Mita 100 |
| OM4 | Mita 2000 | Mita 550 | Mita 400 | Mita 150 | Mita 150 |
Lokacin aikawa: Satumba-03-2021