Uvavanyo lweFiber optic core reflection luqhutywa yi-Optical Time Domain Reflectometer (OTDR). Esisixhobo esisetyenziselwa ukubona ngokuchanekileyo iimpazamo kwikhonkco lefiber optical kuthungelwano lonxibelelwano. I-OTDR yenza i-pulse ngaphakathi kwifiber ukuba ivavanyelwe iimpazamo okanye iziphene. Iziganeko ezahlukeneyo ngaphakathi kwefiber zenza iRayleigh back scatter. Iipulisi zibuyiselwa kwi-OTDR kwaye amandla abo alinganiswa kwaye abalwe njengomsebenzi wexesha kwaye ahlelwe njengomsebenzi we-fiber stretch. Amandla kunye nomqondiso obuyisiweyo uxela malunga nendawo kunye nobukhulu besiphoso esikhoyo. Ayikokugcina kuphela, kodwa kunye neenkonzo zokufakela umgca wokukhanya zisebenzisa ii-OTDRs.

I-OTDR iluncedo ekuvavanyeni ingqibelelo yeentambo zefiber optic. Inokuqinisekisa ilahleko yesplice, ilinganise ubude kwaye ifumane iimpazamo. I-OTDR ikwasetyenziswa ngokuqhelekileyo ukwenza "umfanekiso" wentambo yefiber optic xa isanda kufakwa. Kamva, uthelekiso lunokwenziwa phakathi komkhondo wokuqala kunye nolwesibini oluthatyathiweyo ukuba kuvela iingxaki. Ukuhlalutya umkhondo we-OTDR kusoloko kwenziwa lula ngokuba namaxwebhu asuka kumkhondo woqobo owadalwa xa kwafakwa intambo. I-OTDR ikubonisa apho iintambo zipheliswe kwaye ziqinisekise umgangatho wemicu, uqhagamshelo kunye neziqwenga. Umkhondo we-OTDR nawo usetyenziselwa ukulungisa ingxaki, kuba unokubonisa apho ikhefu likwifayibha xa umkhondo uthelekiswa namaxwebhu ofakelo.

Jera uqhubeke uvavanyo lwe-FTTH yokulahla iintambo kwi-wavelengths (1310,1550 kunye ne-1625 nm). Sisebenzisa i-EXFO FTB-1 kolu vavanyo lomgangatho. Ukuphonononga umgangatho weentambo zethu ukuqinisekisa ukuba umthengi wethu unokufumana iimveliso ezihlangabezana neemfuno zomgangatho.

Senza olu vavanyo kuzo zonke iintambo esizivelisayo.
Ilebhu yethu yangaphakathi iyakwazi ukuqhubeka nothotho lweemvavanyo ezisemgangathweni ezinxulumeneyo.
Wamkelekile ukuba uqhagamshelane nathi ngolwazi oluthe vetshe.