Cikakken sunan na'urar gani da ido shinetransceiver na gani, wanda shine muhimmin na'ura a cikin tsarin sadarwar fiber na gani.Ita ce ke da alhakin juyar da siginar gani da aka karɓa zuwa siginar lantarki, ko juyar da siginar shigar da wutar lantarki zuwa siginar gani mai tsayayye a daidai adadin.
Thena gani module ya ƙunshi na'urorin optoelectronic, da'irori masu aiki da mu'amalar gani.Na'urorin optoelectronic sun haɗa da sassa biyu: watsawa (TOSA) da karɓa (ROSA).
Maɓallin maɓalli na fasaha na ƙirar gani sun haɗa da matsakaicin ikon gani da aka watsa, rabon ɓarna, karɓar hankali, da cikakken ikon gani.
1. Matsakaicin ikon gani da ake watsawa yana nufin lissafin ma'anar ikon gani idan dabarar siginar ta kasance 1 da ƙarfin gani idan ta kasance 0.
2. Matsakaicin ɓarna yana nufin rabon matsakaicin ikon gani na duk lambobin "1" zuwa matsakaicin ikon gani na duk lambobin "0".Zai shafi jin daɗin karɓa.Ya kamata a sarrafa rabon ɓarna a cikin kewayon da ya dace.Babban rabon ɓarna yana da amfani don rage hukuncin wuta, amma da yawa zai ƙara jitter da ke da alaƙa da laser.
3. Karɓar hankali yana nufin mafi ƙarancin iyaka wanda ƙarshen karɓa zai iya karɓar siginar.Lokacin da ƙarfin siginar ƙarshen karɓa ya yi ƙasa da daidaitaccen ƙimar karɓa, ƙarshen karɓa ba zai karɓi kowane bayanai ba.
4. Madaidaicin ƙimar ƙarfin gani yana nufin matsakaicin ikon iya ganowa a ƙarshen karɓar na'urar gani, gabaɗaya -3dBm.Lokacin da ƙarfin gani da aka karɓa ya fi cikakken ƙarfin gani, kuma za a haifar da kurakurai.Saboda haka, idan na gani module tare da babban watsa na gani ikon da aka gwada ba tare da attenuation da loopback, bit kurakurai za su faru.
