GLB3500MT Terr TV ndi Sat Fiber Optic Transmitter
Mafotokozedwe Akatundu
GLB3500M ndi modular 45 ~ 2600MHz RF pa ulalo wa fiber, kutumiza ma TV a Terrestrial TV ndi L-Band RF imodzi pa fiber imodzi.
Direct Broadcasting Satellite (DBS) ndi Direct to Home (DTH) ndi njira zodziwika bwino zosangalalira pa TV padziko lonse lapansi. Kuti muchite izi, satellite antenna, coaxial cable, splitter kapena multi-switcher ndi satellite receiver ndizofunikira. Komabe, kukhazikitsa antenna satana kungakhale kovuta kwa olembetsa omwe amakhala m'nyumba. SMATV (satellite mater antenna TV) ndi yankho labwino kuti anthu okhala mnyumbamo kapena ammudzi agawane mbale imodzi ya satellite ndi mlongoti wapa TV wapadziko lapansi. Ndi chingwe cha fiber, chizindikiro cha SMATV RF chikhoza kuperekedwa ku 30Km kutali kapena kugawidwa ku zipinda 32 mwachindunji, ku 320 kapena 3200 kapena 32000 nyumba kudzera pa GWA3530 fiber optic amplifier.
GLB3500M imakhala ndi gawo la GLB3500MT transmitter ndi GLB3500MR yolandila gawo. GLB3500MT transmitter module ili ndi madoko amodzi kapena awiri a RF pomwe GLB3500MR ili ndi doko limodzi lotulutsa RF. Ndi mzere wapamwamba wa 1550nm wosasungunuka wa DFB laser, photodiode ndi phokoso lochepa la RF lowongolera, GLB3500MT ikhoza kupereka njira zapamwamba za Terrestrial TV ndi satellite RF pa fiber kwa olembetsa ochepa mwachindunji kapena zikwi za olembetsa FTTH kudzera pa EDFA. Ndi njira ya 1310nm/1490nm/1550nm WDM, GLB3500M ikhoza kuyika L-Band+TV RF pa GPON/GEPON. Kupatula mtundu wokhazikika, GLB3500M ikhoza kukhala ndi mtundu wa 19”1RU ukafunsidwa. Ulusi wopita ku nyumba yapulasitiki yakunyumba ya GLB3500MR ndi GFH2000 Optical LNB, pomwe olembetsa a FTTH amangofunika ulusi umodzi ndikutulutsa ma siginecha a satellite kuzipinda zingapo m'banja.
Zina:
• Nyumba yopangidwa ndi aluminiyamu yowonongeka.
• Kulowetsa kwa RF kamodzi kophatikizana ndi bandiwifi: 45 ~ 2600MHz kapena.
• Zolowetsa ziwiri zopatulidwa za RF, kuphatikiza:
- One Terrestrial TV yolowera, bandwidth: 174 -806 MHz.
-Kuyika kwa LNB RF kumodzi, bandwidth: 950MHz ~ 2150MHz (njira ya 13V kapena 18V DC ya LNB pa pempho).
• Doko limodzi la RF lotulutsa.
• High Linearity 1550nm yosazizira ya DFB Laser ndi Photodiode.
• Phokoso lochepa la RF Gain Control circuit.
