Television eriyali zezenzi: ncomo, iinkcazelo, iinkcukacha kunye nohlolo

Losasazo reception nge-eriyali yemveli i ziyakusasaza indlela uphawu umabonwakude ezingabizi kakhulu. Nokuba ngokuchasene nemvelaphi lenguqu ukuya izixhobo transmission yedijithali eziqhelekileyo bangalahlekelwa ukufaneleka. Kwi market radio i Ungafumana eriyali ngeenjongo ezahlukeneyo, kuthathelwa ingqalelo bokuqonda yofakelo kunye nokusebenza. Kufuneka kuqatshelwe ukuba ingxenye zimelwe kakuhle abenzi Russian zesixhobo, kwaye kananjalo kuchaphazela isilayidi ngexabiso. Nangona ukufika kofakelo ezininzi zobugcisa nangoku kwemfuneko eriyeli TV zezenzi, iadvanteji nekufuneka ukuthembeka kunye lula yesondlo. Kakade ke, kukho izinto ezingeloncedo ezicacileyo bezixhobo ezinjalo, kodwa kwezinye iimeko kunokwenzeka ukuba beze phantsi kunye nabo.

Yintoni eyodwa malunga antenna nje?

Umahluko omkhulu phakathi imifuziselo nje kukuba akukho mfuneko ukufakela umbane. Kuba umsebenzisi oku kuthetha akukho indlela yokuqhagamshelana kagesi nokuqinisa. Ngokunjalo, xa kusakhiwa izityalo ezifana ayikho transistors, iitshiphusi okanye amanye amacandelo elektronika bombane. Ngoko ke, oko ugwetyelwayo umbuzo wokuba eriyali osebenzayo okanye passive ngcono ukumelana imisebenzi kwityala elithile? Kubalulekile ukuqaphela ukuba ubukho izinto ezisebenzayo kuyilo ivumela ulwamkelo uphawu kwi meko zinzima, oko kukuthi ngenxa kugunyaziso olongezelelweyo.

Kodwa kukho Icala elisezantsi kuloo sigqibo. Inyaniso kukuba ukunqongophala elektroniki ephelisa imodeli isixando nokugxuphuleka eqhelekileyo nengxolo, nayo leyo kuphucula umgangatho ulwamkelo. Ngaphandle akunakwenzeka ukuthetha malunga ukungabikho ngokupheleleyo ekubetheleleni ubuchule kwezixhobo, abunaluthando amaqhoshana ezizodwa. Wew geometry we isakhiwo, ezo antenna zezenzi, ekuqaleni sikhokelwe ezimele yolwamkelo. Enye into akusoloko kwanele ezi zakhono ekuncedeni izixhobo esitishini ekude ngokuthi kudluliswa iindawo.

iimpawu eziphambili antenna nje

Ekubeni nemisinga iimpawu eziphambili kuyinzuzo lomboleki, ulinganiswa decibels. Njengoko sele kukhankanyiwe, umzekelo kwisixando sokwenziwa alahlekelwe kule salathisi isasetyenziswa esebenzayo, nangona kunjalo, ngaphandle zingaphazanyiswa ihlawula le siphene. Ngokuqhelekileyo, antenna isixando (TB) zinika inzuzo kwi uluhlu 12-20 dB. Loo nto ngokwaneleyo, xa ufuna ukufumana kwendawo inqaba, uphawu Ukhuthaza. Kwakhona nazo ongumzekelo inomlingani ezingaphezu kwama-30 dB, kodwa abanezixhobo ezinjalo kufuneka siqiniseke ngokuba kweli nqanaba ivamile ukulungiselela izixhobo esebenzayo. Ke kaloku, luphawu ebalulekileyo iiyunithi eyimpumelelo inani izahlulo esebenzayo kubume. Kuya kuxhomekeka kubo ubuchule eriyali enkenenkene ukwandisa ulwamkelo ngaphandle elektronika.

ngenayo emoyeni

Iimfaniso for mishini sayilwa isiginali TV ngcembe yaye uqinisekise. Kufuneka uqonde ukuba izixhobo esebenzayo azisoloko ukumelana nokubonelela bonisa umgangatho egumbini, ngoko ukhetho eriyali wesixando ukusetyenziswa ngaphakathi kufuneka wasondela ngenyameko. Kodwa ukuba zabaphindayo ifumaneka kwindawo coverage, ngoko olu khetho kuba yingenelo ngenxa yezizathu eziliqela. Okokuqala, lo eriyali endlwini kwisixando ukuphelisa imfuneko ukwenza ufakelo liner lophahla intambo ende. Okwesibini, imifuziselo ezinjalo zilungiswe ukwalathisa ukufikeleleka nge "Mthovu" okhethekileyo. Kodwa ke, kwakhona, ngokubonelela ezikumgangatho ophezulu "umfanekiso" kunokwenzeka kuphela xa sokuhlaba efanelekileyo ayinikwayo zosasazo.

Models iimoto

Isixhobo yezithuthi ngokubanzi asebenza kwi kumgaqo balwamkele kumabonwakude oluqhelekileyo. Ngokukodwa, i-eriyali isixando iimoto nako ukusebenza ngamaza erediyo zasendle magnetic, kodwa emva koko ayithumele unomathotholo. Uzinzo uphawu imeko uqhuba nto ebaluleke kakhulu, imodeli esebenzayo ibango eliphezulu kangaka. Kodwa ezakhiwe zezenzi kufuneka eziluncedo, umzekelo, ukuba ahluka lula nje kuphela ukusetyenziswa kunye nobukhulu compact, kodwa uvakalelo oluphezulu.

Kukho ezinye iinkcukacha nokusebenza izixhobo ezinjalo. Kubalulekile ukuba ihlale engqondweni into yokuba imoto eriyali kwisixando ngokwesiseko yangaphandle, ngoko ke kufuneka ukhuselwe umonakalo. Oku kuthetha ukuba ilungiselelo owawusisibonakude tsala-out.

enothi lwangaphandle

Ukususela ngokombono umgangatho yokwamkela yeyona ndlela ilungileyo. Kwimeko iimodeli ezitalatweni akunyanzelekanga ukuba bacinge malunga uphazamiso yomntu wesithathu, njengoko uyilo libalwa ulwamkelo onokulufikelela emva kwexesha elide. Noko ke, ukuphazamiseka yokubana kufuphi kwindawo kodwa ukuze iqwalaselwe. Njengoko umthetho, ngaphandle kwe-eriyali kwisixando unalo ubungakanani enkulu kunye nezinto ezininzi ezisebenzayo kuyilo. Ezi mpawu ukuba balwamkele ezinjalo zisebenza ngexesha amade ukusuka zidlulisele. Kodwa ukuhlawula ezi zibonelelo ziya kuba imfuneko kufuneka zixhonywe eluphahleni. I-eriyali kufuneka ngokukhuselekileyo zigxunyekwe umoya kwezulu ayikwazanga kuphazamisa umsebenzi wayo. Ukongeza, intambo efunekayo ushwankathela. Ukuba ikhaya labucala okanye Cottage, iingxaki ezikhethekileyo kunye oko kuya kwenzeka, kodwa eziphakamileyo izakhiwo akakwazi ukwenza ngaphandle ziintambo ezininzi-yafakwa.

Abavelisi kunye namaxabiso

imifuziselo Classical ka-eriyali nje ekuveliseni iinkampani ezifana "kuwela", "Hang", "Antex" njalo njalo. D. ubukhulu becala kuba izixhobo engaxabisi zibiza 300-500 engange. model Room zingathengwa ngenxa 200-250 engange. iinguqulelo zangaphandle ke kancinane imali eninzi, kodwa umthengi inzima kakhulu iya kuba nako ukuhlangabezana engange-1000. enothi Automotive kwisixando ezenziwa phantsi lokuthengiswa "triad", "Imfihlelo", "Prolodzhi" et al. Kulo mzekelo, iindleko ukuze kuvuka ngenxa yokuba abenzi gqibezela imodeli kunye nezincedisi ezongezelelweyo. Kwi-avareji, amaxabiso eriyali enjalo 1000-1500 engange.

reviews okuhle antenna nje

Phakathi okulungileyo ukuba abasebenzisi eriyali kwisixando kuphawula kukubonelela ufakelo lula, akukho mfuneko sokudityaniswa nezombane kunye nokuthembeka eliphezulu. design elula kweemeko ezivumayo nezincomekayo sokusebenza ukuqinisekisa ulwamkelo elungileyo kunye 'umfanekiso' ngaphandle kokuphazanyiswa engeyomfuneko ukuba esonweni umfuziselo esebenzayo. Kwakhona, abaninzi baye baqaphela ukuba eriyali nje ukusebenza ngcono phantsi kweemeko zemozulu embi ngaphezu ezizezinye. design Strong ngaphandle elektroniki akufuneki isiliphu ezinzileyo kunye nokhuselo kwimpembelelo yangaphandle.

ukubuyekeza ezimbi

Njengoko yokusebenza ibonisa, zonke iingenelo izixhobo isixando bancipha zero ukuba transponder akuthethi ukunika inqanaba elifanelekileyo umqondiso. Amalungu waphawula ukuxhomekeka kwezixhobo ezifana kumgangatho nenqaba TV sendawo. Ingakumbi yingxaki kule intlonipho eriyali zezenzi, eyenzelwe ufakelo kweli gumbi. kanye Ingcamango izityalo ezinjalo kufuna ubungakanani amancinane, ngoko ke umsebenzi inciphisiwe kwaye siqinisa isakhiwo. Ngenxa yesi sizathu, ukusetyenziswa ngaphakathi, iingcali sincoma kusekho ujonge imodeli esebenzayo, nto leyo exhasa umsebenzi umbane.

isiphelo

I-eriyali isixando unalo isakhiwo iyunithi, ngoko abaninzi master ekhaya indawo izixhobo zaso esandleni ngohlobo ungamalungu yesinyithi. Kwezinye iimeko, yaye iphumelele iziphumo emihle ngexesha yokulinganisa izixhobo esebenzayo. Kodwa, nkqu ukuphunyezwa bolu inxalenye noshowo alukho kuzo zonke iimeko, unokulindela ukufumana isiphumo kulindeleke. Isibakala sokuba eriyali kamabonwakude kwisixando iye omunye kubalulekile ukuba zonke lula loyilo. Le ukuvimba efanayo yokusebenza kunye intambo, esinika lwenzelwe iparameters ulwamkelo. Ukongeza, umnini-eriyali mveliso uyakwazi ukubala phezu ukuphunyezwa obutofotofo kwaye zichanekile iinketho design. Ngenxa yoko, ummiselo elungeleleneyo iindawo ezisebenzayo ukwazi ukubala nje kuphela yokwamkela uphawu TV ezikumgangatho ophezulu, kodwa ukusebenza kunye zosasazo kunomathotholo band. Ukuphumeza umgangatho ofanayo ngoncedo izixhobo olukhoyo phantse akunakwenzeka.