Ngamhla, umabonwakude ungomnye wemithombo ebalulekileyo yolwazi kunye ne-intanethi. Phantse yonke indlu namhlanje ineTV , kwaye kaninzi ayikho enye. Omnye ukhangele ngokubanzi kwiiteshini zeendaba, umntu ukhetha ifilimu yobugcisa, abanye banomdla kwimiboniso yeTV. Kodwa nakweyiphi na le meko, udinga isalathisi esihle seTV. Oku kufezwe ngokufaka i-antenna ye-TV. Masifunde ukuba zezi zixhobo zifana nani.
Izixhobo ze-antenna zangaphakathi ezisebenzayo zeTV
Njengoko uyazi, i-antenna ihluke ngeendlela eziliqela: indawo yokufakela, ububanzi bebala kunye nohlobo lokuphakanyiswa kwesignali.
Icandelo lokuqala lihlula onke ama-antenna angaphandle (angaphandle) nangaphakathi. Ngaphandle zifakwe kwiphahla lendlu kwaye zinikezela, "umfanekiso" ophezulu. Ngokubhekiselele kwigumbi, zisetyenziswe kakuhle kummandla wendawo ebizwa ngokuba yi-confidence reception, kuba kungenjalo, ukuba indawo yakho ikude kwi-repeater, awuyi kukwazi ukunqumla imithetho ye-physics. Ukongezelela, kufuneka kuqatshelwe ukuba i-antenna yangaphakathi "iyabamba" uphawu kumagumbi ahlukileyo.
Ngoko ke, ukuba ikhaya lakho likwindawo yokufumana isigxina ngesigxina, kuya kucebisa ukuba ukhethe ukufakwa kwegumbi le-antenna. Kodwa zona zahluke, zahluke, okokuqala, ngohlobo lwentetho yokukhulisa. Ngokwale mqathango, i-antenna iyasebenza kwaye ayikho.
Iimodeli ze-antenna ezingapheliyo zinepropati yokukhulisa uphawu lwethelevishini ngenxa yejometri yayo, oko kukuthi, ukuyila. Akudingeki ukuba idibaniswe kwinethiwekhi kwaye ixhotyiswe ngabakhuphisi abongezelelweyo. Inzuzo ephambili yezixhobo ezinjalo kukungabikho kokuphazamiseka okongeziweyo.
Nangona kunjalo, akusoloko i-antenna engakwazi ukujamelana nomsebenzi wayo. Ngamanye amaxesha amandla akhe akwanele ukufumana isignali ephezulu-kula maxesha, asetyenziselwa i-antenna ye-tv yangaphakathi. Baxhotyiswe nge-electronic amplifier, ngoko banokukhathazeka. Esi sikhulu se-amplifier singafakwa ngqo kwizindlu ze-antenna, kodwa zihamba ngokuhlukileyo. I-antenna yangaphakathi esebenzayo ixhunyiwe ngokunikezelwa kwamandla kumandla.
Ukongeza kwezibonelelo ezicacileyo ezichaziwe ngasentla, i-antenna yangaphakathi esebenzayo kunye ne-amplifier inezinto ezingonakalisiyo. Ezi ziquka ukuphazamiseka kwamagunya kunye nokuphazamiseka ngenxa yokusetyenziswa kwe-amplifier. Oku kubonakaliswa ngokusebenzisa izixhobo ezincinci eziphantsi kwexabiso eliphantsi kunye nezixhobo ezibucayi kakhulu ngokukhulisa okukhulu kunamandla. Ingxolo ingenzeka kwakhona ukuba i-antenna esebenzayo isetyenziselwa kwindawo yokumkela ekhuselekileyo apho ukuphuculwa okongezelelweyo kungadingeki nhlobo.
Kwaye, ekugqibeleni, umlinganiselo wesithathu wokukhetha i-antenna yile ndlela. Izixhobo ezinjalo zinokuthi ziboshwe (ie, zikwazi ukufumana ii-MW okanye i-DMW waves) kunye nezixhobo zokusasaza ezifumana zombini iindidi zomqondiso. Ixesha lokugqibela ngexesha lethu liyakuthandwa kakhulu, lilungele ngakumbi, kuba iziteshi ezahlukeneyo zeTV zisasazwa ngamaqela ahlukeneyo. Ngokuthenga i-antenna enjalo, unokwandisa inani leziteshi lijongwa phantse kabini. Kodwa nangona kunjalo, ukuba uceba
Kwaye ngoku-iingcebiso ezimbalwa malunga nokujonga xa ukhetha le sixhobo:
- ngokukhetha imodeli ye-antenna, khokelwa kuqala okokuqala ngezinga lokubonisa ekhaya lakho. Awufanele uphinde uthenge izixhobo ezinjalo nje ngenxa yoyilo oluthandayo;
- ukuba iifestile zendlu "zikhangele" ngokuphindaphindiweyo okanye kumabonakude, ungayeka ukhetho lwe-antenna yewindow. Isixhobo esinjalo siqhutyelwe kwiglasi kwaye, nangona i-antenna yindawo efanelekileyo, kwezinye iziganeko ayisebenzisi okubi kunaphandle;
- ukuba umgama ukuya kwinqaba ingaphezu kwe-15 km, ke kungcono ukunqanda kwi-antenna yangaphakathi, kunye ne-antenna esebenzayo, ngokubhekiselele kwi-antenna yangaphandle.