I-GWB104G Wideband LNB
Incazelo Yomkhiqizo
I-GWB104G iyi-wideband LNB enemiphumela emibili ye-RF. Nge-oscillator yendawo engu-10.4GHz, i-GWB104G iguqula i-10.7GHz~12.75GHz Ku amasignali ebhendi ibe yimiphumela engu-300MHz~2350MHz.
I-low-noise block downconverter (LNB) idivayisi eyamukelayo efakwe ezitsheni zesathelayithi, eqoqa amaza omsakazo esitsheni bese iwaguqulela kusignali ethunyelwa ngekhebula kumamukeli ongaphakathi kwesakhiwo. I-LNB ibizwa nangokuthi ibhulokhi yomsindo ophansi, isiguquli somsindo ophansi (LNC), noma ngisho nesiguquli somsindo ophansi (LND).
I-LNB iyinhlanganisela yeamplifier enomsindo ophansi, i-frequency mixer, i-oscillator yendawo kanye ne-intermediate frequency (IF) amplifier. Isebenza njengengxenye engaphambili ye-RF yesamukeli sesathelayithi, ithola isignali ye-microwave kwisathelayithi eqoqwe yisitsha, iyikhulise, futhi yehlise ibhulokhi yamafrikhwensi ibe ibhulokhi ephansi yamafrikhwensi aphakathi nendawo (IF). Lokhu kuguqulwa kuvumela isignali ukuthi ihanjiswe kumamukeli we-TV yesathelayithi yasendlini kusetshenziswa intambo eshibhile ye-coaxial; uma isignali ihlala kufrikhwensi yayo yasekuqaleni ye-microwave izodinga ulayini we-waveguide obizayo nongasebenzi.
I-LNB ivamise ukuba yibhokisi elincane elilengiswa ku-boom eyodwa noma ngaphezulu amafushane, noma izingalo zokuphakelayo, ngaphambi kwesibonisi sesitsha, lapho igxila khona (nakuba ezinye imiklamo yesitsha ine-LNB phezu noma ngemuva kwesibonisi). Isignali ye-microwave esitsheni ithathwa yi-feedhorn ku-LNB futhi inikezwa engxenyeni ye-waveguide. Iphinikhodi yensimbi eyodwa noma ngaphezulu, noma ama-probe, aphumela ku-waveguide kuma-engeli angakwesokudla ku-eksisi futhi asebenze njengezimpondo, ephakela isignali ebhodini lesekethe eliphrintiwe ngaphakathi kwebhokisi elivikelwe le-LNB ukuze licutshungulwe. Isignali ephansi yefrikhwensi ye-IF iphuma kusokhethi ebhokisini lapho intambo ye-coaxial ixhumeka khona.
Ezinye izici:
•Izimbobo ezimbili ze-RF, ngayinye i-300MHz ~ 2350MHz.
•Isibalo somsindo ophansi.
•Ukufakwa kalula.
•Ukusetshenziswa kwamandla okuphansi.
•Izinga eliphezulu lokuvikela isimo sezulu.
•Ukufakwa okugcwele kwe-Ku-Band ye-Analog ne-HD Digital reception.
