I-GLB3500MT Terr TV kanye ne-Sat Fiber Optic Transmitter
Incazelo Yomkhiqizo
I-GLB3500M iyi-modular 45~2600MHz RF phezu kwesixhumanisi sefayibha, idlulisela iziteshi ze-Terrestrial TV kanye ne-L-Band RF eyodwa phezu kwefayibha eyodwa.
I-Direct Broadcasting Satellite (DBS) kanye ne-Direct to Home (DTH) kuyindlela edume kakhulu yokujabulela i-TV yesathelayithi emhlabeni wonke. Ukuze wenze lokhu, i-antenna yesathelayithi, intambo ye-coaxial, i-splitter noma i-multi-switcher kanye nesamukeli sesathelayithi ziyadingeka. Kodwa-ke, ukufakwa kwe-antenna yesathelayithi kungase kube nzima kubabhalisi abahlala ezindlini. I-SMATV (i-satellite mater antenna TV) iyisixazululo esihle sokuthi abantu abahlala esakhiweni noma emphakathini babelane ngesitsha sesathelayithi esisodwa kanye nothi lwe-TV yasemhlabeni. Ngekhebula le-fiber, isignali ye-SMATV RF ingalethwa ku-30Km kude noma isatshalaliswe ezindlini ezingama-32 ngokuqondile, ezindlini ezingu-320 noma ezingu-3200 noma ezingu-32000 nge-GWA3530 fiber optic amplifier.
I-GLB3500M iqukethe imojula ye-GLB3500MT yokudlulisela kanye nemojuli yomamukeli we-GLB3500MR. Imojula ye-transmitter ye-GLB3500MT inembobo yokufaka ye-RF eyodwa noma amabili kuyilapho i-GLB3500MR inembobo yokukhipha eyodwa ye-RF. Ngomugqa ophezulu ongu-1550nm we-DFB laser ongapholisiwe, i-photodiode nomsindo ophansi wesekhethi yokulawula inzuzo ye-RF, i-GLB3500MT ingaletha iziteshi ze-Terrestrial TV zekhwalithi ephezulu kanye nesathelayithi RF phezu kwefayibha kwababhalisile abambalwa ngokuqondile noma izinkulungwane zababhalisile be-FTTH nge-EDFA. Ngenketho engu-1310nm/1490nm/1550nm WDM, i-GLB3500M ingafaka i-L-Band+TV RF phezu kwe-GPON/GEPON. Ngaphandle kwenguqulo ye-modular, i-GLB3500M ingaba nenguqulo engu-19”1RU uma icelwa. Ifayibha eya enguqulweni yendlu yepulasitiki yasekhaya ye-GLB3500MR iyi-GFH2000 i-LNB yokubona, lapho obhalisele i-FTTH edinga nje ifayibha eyodwa futhi akhiphe amasiginali wesathelayithi emakamelweni amaningana omndeni.
Ezinye izici:
• Izindlu ze-aluminium die eziqinile.
• Okokufaka kwe-RF okuhlanganisiwe okukodwa nomkhawulokudonsa:45~2600MHz noma.
• Okokufaka kwe-RF okubili okuhlukene, okuhlanganisa:
-Okufakwayo kwe-Terrestrial TV eyodwa, umkhawulokudonsa: 174 -806 MHz.
-Okufakwayo okukodwa kwe-LNB RF, umkhawulokudonsa: 950MHz~2150MHz (inketho engu-13V noma engu-18V DC ye-LNB ngesicelo).
• Imbobo yokukhipha eyodwa ye-RF.
• I-High Linearity 1550nm engapholisiwe ye-DFB Laser ne-Photodiode.
• Umsindo ophansi we-RF Gain Control circuit.
