G1 Universal LNB
Sharaxaada Alaabta
G1 taxanaha caalamiga ah LNB wuxuu leeyahay hal ama mataano ama Quattro, deked kasta oo RF ah waxay leedahay 950 ~ 2150MHz wax soo saarka oo leh 13V ama 18V oo rogaal celisa DC-ga qaata satalaytka.
Aaladda hooseysa ee loo yaqaan 'Block downconverter' (LNB) waa aaladda ku rakiban saxamada dayax-gacmeedka, kaas oo ka soo ururiya hirarka raadiyaha saxanka una beddela signalka loo soo diro fiilada loo diro qaboojiyaha gudaha dhismaha. LNB waxa kale oo loo yaqaan block sanqadha hoose, beddelka sanqadha hooseeyo (LNC), ama xitaa hoos-u-dejinta qaylada (LND).
LNB waa isku darka cod-weyneeye dhawaq hoose, qasiyaha soo noqnoqda, oscillator maxalli ah iyo cod-weyneeye dhexdhexaad ah (IF). Waxay u adeegtaa sidii dhamaadka hore ee RF ee satalayt-ka qaataha, iyada oo ka helaysa signalka microwave-ka ee dayax-gacmeedka uu ururiyay saxanka, kor u qaadaya, iyo hoos u dhigista xannibaadaha soo noqnoqda oo u beddelaya qayb hoose oo soo noqnoqonaya dhexdhexaad ah (IF). Isbeddelkan hoos u dhaca wuxuu u oggolaanayaa calaamadda in lagu qaado satalaytka gudaha ee soo-dhoweeyaha iyada oo la adeegsanayo fiilada coaxial oo raqiis ah; Haddii calaamaduhu ku sii sugnaado inta jeer ee hore ee microwave waxay u baahan doontaa khad mawjad qaali ah oo aan macquul ahayn.
LNB inta badan waa sanduuq yar oo ku xidhan hal ama in ka badan oo booms gaaban ah, ama cudud quudin, horteeda muraayada saxanka, marka ay diirada saarto (inkasta oo qaar nashqado saxan ah ay LNB ku yaalaan ama ka dambeeyaan muraayada). Digniinta microwave-ka ee saxanka waxa ka soo qaada feedhoonka LNB waxaana lagu quudiyaa qayb ka mid ah waveguide. Hal ama in ka badan biinanka birta ah, ama baarayaasha, ayaa ka soo baxa mawjadaha xagal qumman ee dhidibka waxayna u dhaqmaan sidii anteenooyinkooda, iyaga oo quudinaya calaamada looxa wareegga daabacan ee gudaha sanduuqa gaashaanka LNB si loogu habeeyo. Soo noqnoqda hoose HADDII calaamad wax soo saarku ka soo baxdo godka sanduuqa kaas oo fiilada coaxial ay ku xirto.
