Ukukhethwa kwe-antenna yithelevishini akuyona into elula njengoba kungase kubonakale ekuqaleni. Uhlobo lwe-antenna oludinga luncike ezintweni eziningi. Lona indawo yokuhlala, nokude kude nombhoshongo wethelevishini, nokuba khona kokuphazanyiswa, kanye nenani leziteshi ezifunayo.
Kuze kube manje, kunezinhlobo ezintathu eziyinhloko zama-antenna: i-satellites, yangaphandle ne-antenna yangaphakathi ye-TV. Isihloko sethu samanje sizokutshela ukuthi ungakhetha kanjani i-antenna yekamelo le-TV. Ake sithole ukuthi iyiphi le divayisi, nokuthi yikuphi ukuguqulwa okufanele kubhekwe uma uyithenga.
Igumbi leThelevishini i-Antenna
Lolu hlobo lwe-antenna lufanele kuphela kulabo abasebenzisi abahlala endaweni yephawu lokulinganisela. Ngamanye amazwi, izakhamuzi zasendaweni ezikude ezingamukelekile ukutholwa kwesignali ye-antenna ephakathi yangaphakathi (ngisho ne-amplifier) ngeke ibe ngokwanele.
Phakathi kwezinzuzo zama-antenna angaphakathi kukhona:
- ukuhambisana - i-antenna enjalo ayithathi isikhala esiningi endlini yakho;
- ukuhamba - kungasuswa kalula kusuka egumbini kuya ekamelweni, kuxhunywe kwenye isethi yethelevishini, ithuthelwe kwenye indawo yokuhlala noma ku-dacha;
- izindleko eziphansi - uma kuqhathaniswa ne-satellites kanye ne-antenna yangaphandle, leyunithi ongayithenga ngentengo ephansi.
Ukushiyeka okuyinhloko kwama-antenna ase-TV angaphakathi asebenzayo, okokuqala, ukusebenza kwawo okuphansi, futhi okwesibili, isidingo sokuba indawo ku-20-30 km kusukela efonini eliseduzane, futhi okwesithathu, ukulungiswa okuhle okuyimpoqo. Khumbula ukuthi ukuthola eduze kombhoshongo akuyona inketho enhle: kulokhu, kuzoba nezinye izinhlobo zomsindo, isibonelo, ukubonakaliswa kwesignali. Ukuziqeda, udinga idivayisi, okuphambene nesikhulumi (kuthiwa yi-attenuator).
Izinhlobo ze-antenna zasendlini
Kunezinhlobo ezimbili eziyinhloko zama-antenna angaphakathi - i-pivot ne-frame.
- Eyokuqala yizinsimbi ezimbili zensimbi zesikhala esiphezulu se-meter eyodwa. "I-Antenna" yezintambo ezigobile ezindaweni eziningana - lokhu kuyadingeka ukulungisa i-antenna. Ukuze uthole "isithombe" esihle sesiteshi esisodwa, kuzomele uzame kanzima ukuyilungisa. Kodwa ngezinye izikhathi kwenzeka ukuthi ukuhlelwa okuphelele kwesiteshi esisodwa se-TV kunikeze ukwehluleka kokucushwa kwabanye. Ngakho-ke, ngaphambi kokusebenzisa i-antenna yangaphakathi, i-master cishe inakho ukushayela, okuyiyo yokushintsha kwimodi ethile.
- Umehluko phakathi kwe-antenna nasendlini yindonga yangaphakathi ukuthi isebenza kumodi ye-decimeter (dmv). I-antenna ye-loop yinsiza yensimbi ngendlela ye-ring evulekile. Le design elula inezici ezifanayo njengenhloko, ngakho ayikho umehluko othile ekukhethweni kohlobo lwe-antenna yangaphakathi. Lapha kufanele ugxile ekuphatheni okuhle kokuthola isignali - imitha noma ukunciphisa, futhi lokhu, kunalokho, kuncike kwinani leziteshi ze-TV othanda ukuzibuka.
Muva nje, uhlobo olusha lwe-antenna yangaphakathi luye lwaba ethandwa kakhulu: izintambo zomhlaba wonke-ama-log-periodic okwenzelwe ububanzi be-decimeter. Babizwa nangokuthi i-broadband, ngoba bangakwazi "ukubamba" inamba enkulu yamashaneli okuvama, enikeza isithombe esihle.
Ngakho-ke, masidonse iziphetho. I-antenna yasendlini inengqondo ukuthenga, uma uhlala edolobheni (hhayi emaphandleni) ngesamukeli esivamile, umbhoshongo weTV oseduzane useduze nendawo engamakhilomitha angu-30 ekhaya lakho, futhi ufuna ukulungisa izinga lezignali kancane, ngaphandle kokuchitha imali eningi kulo.
Futhi ungenza i-antenna ngezandla zakho siqu kusuka ezintweni ezingenakulungiswa ngisho nasezinkalini zamabhiya .