Kuze kube yiminyaka embalwa edlule, amakhaya amaningi abe nenkinga evamile lapho ebuka ithelevishini: noma isignali yaphuma noma isithombe nomsindo kwavela ngokuphazanyiswa. Ubani okungakaze kwenzeke kuye? Uma uneminyaka ethile, ngokuqinisekile uyakhumbula ukuthi wawuphila. Kuwuhlupho lapho ufika ekhaya ulindele ukulalela uhlelo lwakho oluthandayo, noma lowo mdlalo webhola lezinyawo osulindelwe isikhathi eside noma umdlalo wokuqala futhi, uma ungawulindele, ngaphandle kwesignali! Sala kahle ezinhlelweni zakho zeseshini yethelevishini ephumuzayo. I I-antenna yasendlini ye-DTT uze ukuzohlinzeka ngesixazululo salokhu kuphazamiseka. Angazi ukuthi kumayelana nani? Sikubonisa yona.
Ukuntuleka kwesignali kuzoba yinto yesikhathi esedlule ngisho noma unethelevishini endala noma i-Smart TV. Lezi zimpondo ziwusizo kakhulu lapho isignali inesici noma ingafinyeleli, into evame kakhulu ezindaweni ezikude zedolobha.
Iyini i-antenna ye-DTT yasendlini
Kuyidivayisi yedijithali yobuchwepheshe besimanje evumela thwebula kangcono isignali yezithombe nemisindo. Ngokuvamile kulula ukuzifaka nokuzilungiselela. lezi zimpondo xhuma ngqo ku-TV, aklanywe ngobuhle futhi, uma kunezinkinga zesignali, alungiswa kalula.
Iningi lalawa ma-antenna angaphakathi ane-a ibanga elingaphansi kuka-50 km, ngakho-ke ngaphambi kokuyifaka kufanele uhlole ukuthi kukhona ukuhambisana. ukuqina kwe isignali yayo ayilungile ngaso sonke isikhathi uma ifakwe ngaphakathi kwekamelo elinezithiyo eziningi, okudala ukuphazamiseka.
Kubalulekile ukuthi i-antenna ibe yekhwalithi enhle futhi, ukuze yamukeleke kahle, kufanele ibe eduze kwefasitela. Uma ubona ukuthi uthi lwakho lwasendlini lunenkinga yokwamukela isignali ye-DTT (I-Digital Terrestrial Television), kungangcono ukuthi ulufake esikhundleni salo ngothi lwangaphandle.
Sebenzisa eyodwa I-antenna yangaphakathi ye-DTT uma uhlala kwelinye endaweni ecacile noma edolobheni elikhulu, futhi uyibeke eduze kwefasitela. Kwesinye isikhathi uma ungekho ulayini oqondile oya esiteshini se-DTT, uthi kufanele lukwazi ukudlulisela kusiqophi sokungena okungenani isignali engu-23 dB ye-C/N (Carrier to Noise). Ukwamukela i-antenna kuzoba ngcono kakhulu uma inakho ukuqina.
Iyini i-antenna ye-DTT yasendlini?
Ukusetshenziswa okuyinhloko kwalolu hlobo lwe-antenna ukuthi ungakwazi ukujabulela ithelevishini yakho ngaphandle kokuthi ugibele ophahleni lwendlu yakho ukuze beka uthi lwe-DTT. Uma ungazange ubeke isokhethi ye-antenna kunoma yisiphi isikhala endlini yakho, ngeke udinge ukufaka intambo ye-coaxial lapho ithelevishini ikhona, kodwa sebenzisa I-antenna yangaphakathi ye-DTT.
Ukusebenzisa le antenna kuyonga futhi, ngaphezu kwalokho, kunikeza isitayela esihle nesinhle, ukugwema ukubonisa ikhebula eliwela indlu. I izimpondo zangaphakathi azinaphutha, kuya ngokuthi Inikeza amandla kanye nekhwalithi yesignali engakanani?. Kuzodingeka ukuthi okungenani ibe nesignali encane enamandla adingekayo ukuze idivayisi ikwazi ukuyithwebula.
Kulokhu, kuyodingeka ukuyikhulula ekuphazamiseni, njengezakhi eziyivimbelayo; izindonga, amashalofu, njll. Lapho i- isignali impofu Los iziteshi zingaba namaphikiseli.
Lezi zimpondo kufanele isetshenziswe ezindaweni lapho isignali ingaphazanyiswa khona. Uma uhlala esakhiweni esizungezwe ezinye izakhiwo, umuntu ohlala phansi uzoba nobunzima obukhulu ngesignali kunomuntu ose-attic, ngoba endaweni yokugcina bazobe bekhululekile ukuthola isignali futhi kuyoba yinto efanelekile. indawo eya bona i-DTT.
Isebenza kanjani i-antenna ye-DTT yasendlini
Le antenna inomgomo wokusebenza, guqula amasignali kagesi abe amaza kagesi futhi ngokuphambene nalokho. Isekelwe emthethweni kaFaraday wokungeniswa kwe-electromagnetic. Lapho i-electromagnetic wave ifika othini lwe-DTT, kukhiqizwa umsinga kagesi kulo.
I-Said current igijima ku-antenna, ikhiqize insimu ye-electromagnetic esatshalaliswa njengegagasi kuyo yonke indawo. Ngokufanayo, lapho i-antenna ithola igagasi lozibuthe, i-oscillation yalo ikhiqiza amandla kagesi ku-antenna, okuvumela leyo siginali ukuthi icutshungulwe futhi ikhishwe ikhodi.
Uma uthi luthola isignali ye-TV, iyacutshungulwa futhi ikhuliswe ukuze kube nekhwalithi engcono namandla. Ukuxhuma kusuka ku-antenna kumabonakude kwenziwa kusetshenziswa intambo ye-coaxial ekufakweni kwethelevishini. Uma usuxhume uthi, kufanele uqale ukushuna amashaneli, uwaseshe, futhi uwagcine.
Ukuze wenze lokhu, kufanele uye kumenyu yezilungiselelo ze-TV bese ukhetha noma yikuphi kwalezi zinketho: “Ukushuna Okuzenzakalelayo"Noma"Ukusesha Kwesiteshi”. Manje, ukushuna iziteshi qhubeka nokusebenzisa lezi zinyathelo:
- Hlola ukuthi uthi ixhunywe kahle ku-TV yakho.
- Vula umabonakude futhi usebenzisa isilawuli kude finyelela imenyu yokumisa.
- Bheka noma iyiphi yalezi zinketho ezimbili: “Ukushuna"Noma"ukumiswa kwesiteshi".
- Kuzoncika kumodeli onayo yethelevishini, ozoyikhetha ukulungiswa okuzenzakalelayo o inhlukano. Okokuqala, izosesha ngokuzenzakalelayo futhi ilondoloze zonke iziteshi. Endabeni yezandla, iziteshi zizoseshwa ngayinye ngayinye.
Uma usuwakhethile amashaneli, ungawagcina kumemori ye-TV ukuze uwafinyelele kalula.
Ama-antenna angaphakathi e-DTT angcono kakhulu
Lawa ma-antenna awabizi futhi awanazo izici ezikutshela ukuthi inketho eyodwa ingcono kunenye. Nazi ezinye izinketho.
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I-antenna eyodwa ye-TV ethuthukisiwe iwuthi lwesimanje lokwamukela i-TV yedijithali ye-4K Ultra HD. Inesihlungi esikhethekile sokuvimbela i-3G/4G, ukuze singaphazamisi isignali yeselula. Idizayini emisha, isukela ku-0 kuye ku-25 km.
Manje uyazi konke okudingayo kusuka ku- I-antenna yasendlini ye-DTT ngakho-ke, uma uzoyithola, ungenza isinqumo esingcono kakhulu.