Sassan da ke gaba suna ba da cikakken bincike game da matsalolin gama gari a gwajin fiber.
(1) Me yasa gwajin fiber ya wuce amma fakitin har yanzu yana ɓacewa yayin aikin cibiyar sadarwa?
A cikin zaɓin ma'auni, masu amfani da yawa za su yi wasu kurakurai a bayyane, kamar ba da kulawa kaɗan ko fiber ɗin da aka gwada shine 50μm ko 62.5μm.
Abubuwan buƙatun don ƙimar hasara mafi girma na zaruruwan buɗaɗɗen buɗaɗɗiya suna da girma. Zaɓin da ba daidai ba na ma'aunin gwajin kebul na gani zai haifar kai tsaye zuwa canjin ƙididdiga. Misali, idan ainihin hanyar da aka auna shine fiber 50μm, kuma ma'aunin gwajin da aka zaɓa shine 62.5μm, kuma aikace-aikacen shine 100Base-FX, yana ɗaukar sakamakon gwajin shine 10dB, mai gwadawa zai sami sakamakon PASS, kuma ainihin yanayin ya kamata ya kasance. wanda bai cancanta ba Domin ya zarce iyakar yanke shawara na 6.3dB.
Wannan yana amsa tambayar da ta gabata, kuma gwajin ya wuce, amma me yasa har yanzu bayanan za su rasa fakiti.
(2) Me yasa har yanzu ba a goyan bayan ƙimar Gigabit 10 lokacin da ya wuce mizanin Gigabit 10?
Akwai irin waɗannan masu amfani waɗanda ke haɓaka ƙashin bayan hanyar sadarwar. Za su haɓaka modules nacanzada uwar garken. Tabbas, za su kuma gwada asarar fiber a cikin hanyar sadarwa. Da alama babu matsala a cikin hanyar. An gwada fiber ɗin don biyan buƙatun hanyar sadarwar Gigabit 10. , Asarar ƙasa da daidaitaccen iyaka, amma ainihin aikin ba shi da kyau.
Dalilin binciken shine yawanci cewa ba a la'akari da yanayin bandwidth na kebul na fiber optic ba. Yanayin bandwidth na igiyoyi na fiber optic daban-daban yana wakiltar iyakar bandwidth wanda za'a iya bayarwa a cikin wani tazara. Mafi girman girman bandwidth na yanayin, mafi girman adadin watsawa a cikin wani ɗan nesa. An tura su a cikin shekarun baya. Gabaɗaya, yanayin bandwidth ɗin yana da ɗan ƙaramin ƙarfi, ƙasa da 160. A sakamakon haka, ba za a iya ƙara saurin gudu ba yayin da nisa ya fi tsayi, kodayake an karɓi asarar a wannan lokacin.
(3) Asarar gwajin ya kai daidai, kuma babu matsala tare da bandwidth na yanayin. Me yasa akwai matsala a ainihin aiki?
Har yanzu muna da rashin fahimta a cikin gwajin. Muddin hasara ta wuce, ana ɗaukar fiber ɗin yana da kyau, amma wannan ba haka bane. Yin la'akari da irin wannan halin da ake ciki, daidaitattun ƙira yana buƙatar asarar hanyar haɗin gwiwa ta zama 2.6dB. Asarar shugaban adaftan ya fi 0.75dB, amma jimillar asarar hanyar haɗin kai har yanzu tana ƙasa da 2.6dB. A wannan lokacin, idan kawai kuna gwada asarar, ƙila ba za ku sami matsalar adaftar ba, amma a cikin amfani da hanyar sadarwa ta gaske, zai kasance saboda matsalar adaftar. Sakamakon haka, adadin kuskuren watsawa ya ƙaru sosai.