Namuhla, ithelevishini ingenye yemithombo ebaluleke kakhulu yolwazi kanye ne-intanethi. Cishe yonke indlu namuhla ine- TV , futhi ngokuvamile ayikho enye. Omunye ubheka kakhulu eziteshini zezindaba, othile uthanda amafilimu odwebuko, abanye banesithakazelo kumbukiso we-TV yokuzijabulisa. Kodwa kunoma iyiphi yalezi zimo, udinga isignali enhle ye-TV. Lokhu kutholakala ngokufaka i-antenna yethelevishini. Ake sithole ukuthi lawa madivayisi afana nani.
Izici ze-antenna zasendlini ezisebenzayo ze-TV
Njengoba wazi, ama-antenna ahluke ngezindlela eziningana: indawo yokufaka, ububanzi bemikhawulo kanye nohlobo lwe-amplification yesignali.
Isigaba sokuqala sihlukanisa wonke ama-antenna angaphandle (angaphandle) nasendlini. Ngaphandle kuvame ukufakwa ophahleni lwendlu futhi unikeze "isithombe" esihle, esiphezulu. Ngokuqondene negumbi, zisetshenziswe kangcono endaweni ebizwa ngokuthi ukwamukela i-confidence, ngoba kungenjalo, uma indawo yakho ikude nokuphindaphindiwe, ngeke ukwazi ukuphambene nemithetho ye-physics. Ngaphezu kwalokho, kufanele kuqashelwe ukuthi i-antenna yangaphakathi "ibamba" isignali emakamelweni ahlukene ngokungalingani.
Ngakho-ke, uma ikhaya lakho lisendaweni yokwamukelwa ngokuqiniseka kwesignali, khona-ke kuyobe kululeka ukukhetha ukufakwa kwe-antenna ekamelweni. Kodwa ahluke, ahluke, okokuqala, ngohlobo lwe-signal amplification. Ngokwale nqubo, ama-antenna asebenzayo futhi awenzi lutho.
Amamodeli we-antenna angenawo amandla okukhulisa isibonakaliso sethelevishini ngenxa yejometri layo, okungukuthi, ukuklama. Akudingeki ukuthi baxhumeke kunethiwekhi futhi bahlome ngeziphakamisi ezengeziwe. Inzuzo enkulu yamadivayisi anjalo ukungabikho kokuphazamiseka okungeziwe.
Kodwa-ke, akusiyo njalo i-antenna engenayo ingakwazi ukubhekana nomsebenzi wayo. Ngezinye izikhathi amandla ayo akwanele ukuthola isignali ephezulu - kulezi zimo, asetshenziselwa ama-antenna asekhaya angaphakathi. Bahlome nge-amplifier ye-elekthronikhi, ngakho bazwela kakhulu. I-amplifier enjalo ingafakwa ngqo ezindlini ze-antenna, kodwa ingahamba ngokuhlukile. I-antenna esebenzayo yasendlini ixhunywe ngokunikezwa amandla kwamandla.
Ngaphandle kwezinzuzo ezicacile ezichazwe ngenhla, i-antenna esebenzayo yangaphakathi ne-amplifier inezinkinga. Lokhu kufaka phakathi ukuphazamiseka kwesignali nokuphazanyiswa ngenxa yokusebenzisa i-amplifier. Lokhu kubonakaliswa ngokusebenzisa kokubili okushibhile okukhulisa izinga eliphezulu kanye nezinsimbi ezibucayi kakhulu ezinamandla okukhulisa kakhulu. Umsindo ungase futhi kwenzeke uma i-antenna esebenzayo isetshenziselwa indawo yokuthola indawo ephephile lapho ukukhuliswa okwengeziwe kungadingeki khona nhlobo.
Futhi, ekugcineni, umgomo wesithathu wokukhetha ama-antenna yibanga. Amadivaysi anjalo angafakwa amabhande (okungukuthi, akwazi ukuthola ama-MW noma ama-DMW amagagasi) namadivayisi wonke-ama-wave athola kokubili izinhlobo zamasignali. Lezi zikhathi zesikhathi sethu zithandwa kakhulu, zilula kakhulu, ngoba iziteshi ezahlukene ze-TV zisakazwa ngamaqembu ahlukene. Ngokuthenga i-antenna enjalo, ungandisa inani leziteshi libhekwa cishe kabili. Kodwa naphezu kwalokhu, uma uhlele
Futhi manje - amathiphu ambalwa okumele uwabheke lapho ukhetha le divayisi:
- ukhetha imodeli ye-antenna, uqondiswe kuqala yizinga lesignali ekhaya lakho. Akufanele nanini uthenge amadivaysi anjalo nje ngenxa yomklamo oyithandayo;
- uma amafasitela efulethini "abukeka" ngokuphindaphindiwe noma esikhungweni sethelevishini, ungayeka ukhetho lwe-antenna yewindi. Idivayisi enjalo ifakwe engilazi futhi, nakuba i-antenna empeleni igumbi, kwezinye izimo akusebenzi lutho olubi kunaleyo;
- uma ibanga eliya embhoshongweni lingaphezu kuka-15 km, kungcono ukulahla i-antenna yangaphakathi, ngisho ne-antenna esebenzayo, ngokuqondene ne-antenna yangaphandle.