Digital Antenna ngoba DVB-T2 ngezandla

esephepheni Digital kwenza isignali ithelevishini ukuyibeka kubo owamukelayo, ukunciphisa noma yikuphi ukulahlekelwa. TV ukusekela ubuchwepheshe, udinga i-antenna ngoba DVB-T2. izandla zabo ukwenza leli thuluzi ishibhile kuka ukuthenga ngomumo eyenziwe, ungayikhokhele ecishe ibe yizinkulungwane 3. ruble. Air digital TV uthatha indawo yabo bonke izinhlobo ezifanayo amasignali ukudluliswa, ngenkathi enikeza izinga okusezingeni nokwehluka iziteshi ukusakaza.

Izinguquko emoyeni

Yenza antenna okwesikhathi tube TV kwakubhekwa njengokuvukela uyisidala e yakhe isikhathi ehlonishwayo futhi imibukiso ezingeni ikhono yesimanje emhlabeni umdlandla okuzenzela amadivayisi ungacimi, futhi abaningi zenziwa kubalulekile DVB-T2 antenna kanye izandla zenu. abakhiqizi imishini industrial ukuzivumelanisa nezimo ezishintshayo reception ukuthi ukuxhuma electronics zanamuhla indinganiso ukwakhiwa aziwayo, nabakhi bezindawo abanaki imithelela yokuthi isimo esiyinhloko ukusebenza kwe-antenna basebenzisana yayo kanye amasignali eliwumhlaba.

Eminyakeni yamuva, cishe yonke ukusakaza senzeka uhla DVB-T2, okuyinto kunciphisa tindleko kanye lula, kusukela iphuzu kwezomnotho umbono, antenna-Element iziteshi zokudlulisa ipulazi. Sesondlo gqwa kudinga izisebenzi kancane abagogodile, umsebenzi wakhe uba ngaphansi futhi uyingozi.

Zidlulisele ukusakaza amasignali yonkhe emadolobheni amakhulu nasemadolobheni ezigqagqene ngakho ukubamba wave mncane kusuka iziteshi zingagadiwe endaweni eqhelile kuba olufanele uma antenna efakwe ukuthola DVB-T2, izandla zabo ezenziwe ngezinto lutholakale kalula.

Ngenxa ukwakhiwa eyisikhathi kwagcizelela izakhiwo zikakhonkolo emzini baye kakhulu ushintshe nemibandela isignali esiphelweni e imizana. Multi-storey izakhiwo zensimbi ozimele kukhona uhlobo nesibuko okubonakala kuso amagagasi izikhathi ezimbalwa kuze kube ukuwohloka ngokuphelele.

Ngo ukusakaza bukhoma eziteshini lanamuhla eziningi. Isignali digital lihlukile abanye ukuthi noma kuyinto noma asenziwe, isikhundla maphakathi kunganikezwa. Okunye system yokudlulisela libhekene yokuthi iziteshi azibonayo umsindo ehlukile, okubangela izinga esincishisiwe translation, ngezinye izikhathi isithombe kungenzeka nje ulahleke. Antenna ngoba DVB-T2, ngezandla zakhe wenza, kuzovumela ukwamukela isignali okufanayo kuzo zonke iziteshi, ebonisa ikhwalithi yesithombe efanayo.

ekhethekile digital isignali okusakaza ukuthi asisebenzi ukuphazamiseka uma lidlula umsindo isigamu UDecibel, yokwamukela ezinhle wenziwa. On ukulahlekelwa isignali lokungafani kuthinta ikhebula noma isigaba ukuhlanekezela ngasiphi ingxenye ukudluliswa ekamelweni Sombhalo, isithombe kungenziwa ahlakazekile ibe izingxenye ezincane ngisho noma isignali enamandla.

izici Baseline womshini antenna

Ngaphambi indlela yokwenza antenna DVB-T2 ngezandla zabo, kufanele uhlole isimiso emsebenzini wayo.

Ukuze abambe kusiginali yedijithali liyadingeka UHF antenna, okuyinto lula kakhulu ukwakha ngisho kusuka ikhebula ilula, okwenza ukubala lesifanele.

Imfundiso ukuthi amasiginali digital zihunyushelwa kalula decimeter ububanzi futhi zingafundwa yiluphi uhlobo-antenna, kodwa empeleni musa njalo ukusebenza.

Yenza Ithelevishini ngokuzimela zingenzeka izindleko sakugcina ngaphandle kosizo bangaphandle, kodwa kufanele sikhumbule ukuthi umkhiqizo etholwe izinga yokwamukela amadivayisi professional bakhiphe elezinga eliphansi.

Izimfuneko antenna

izimo okusha lokusakaza, ukusatshalaliswa futhi yokwamukela emoyeni ukushintsha izidingo eziyisisekelo okufanele zifinyelelwe antenna TV ngezandla zakho. DVB-T2 ukhansele ngaphambilini okuza abalulekile futhi ohlangothini isenzo zokuzivikela. Ziyakwazi amadivayisi yesimanje azinandaba, kusukela emoyeni lingcolile lona, balwe ngisho ne ingress ukuphazamiseka encane kungenzeka kuphela esebenzisa electronics. Ngesikhathi esifanayo, idlala obalulekile indima Coefficient antenna siqu inzuzo (CG).

Antenna kahle kufunwe ester ine headroom amandla isignali eyamukelwe okuvumela electronics ukuhlunga ke kusukela kokuthikanyezwa, futhi nokuthungatha umsindo. antenna Modern for DVB-T2, ngezandla zakhe wenza, igcina ukusebenza kagesi ngendlela yemvelo, hhayi bazivumelanisa nemingcele eyamukelekayo usebenzisa Izindlela zobunjiniyela bezobuchwepheshe. It is kuvunyelwana lonke yokusebenza imvamisa uhla ngaphandle ukusetshenziswa kwamadivaysi okulinganisa.

Izimfanelo amplitude kanye nokuvama antenna

I-antenna yenziwe yaba khona a smooth xaxa, isigaba ukuhlanekezela kwenzeka ngenxa abukhali ekushayweni uhlamvu ofaka. Single-imvamisa antenna sisalokhu i maqondana okwamukelekayo isignali umsindo, kanjalo ubafaka ukuthola iziteshi 40. Kodwa asethwe ukuvumelana obengeziwe yokukhulisa umsindo ukuthi ukuncela amagagasi noma kuhlanekezelwe izinkomba isigaba.

Indlela ephumelela kakhulu antenna digital DVB-T2 elenziwe ngezandla zabo:

• chastotonezavisimoy - nokusebenza ongaphakeme, kodwa eshibhile futhi kulula ukukhiqiza, le esakhiwe endaweni esifushane, ukuthola endaweni emoyeni kuqhathaniswa ihlanzekile ngaso ibangana esiteshini ngobulili;
• ububanzi Periodic, eqoqa konke amagagasi e evulekile, izinhlobo ekahle kubo okuyinto kuyahluka isakhiwo esilula isebenza kahle ibhangqwe Frieder kulo kokuthola isandiso.

Uma sikhuluma design, kakhulu elula DVB-T2 antenna ngezandla zakho ekhiqizwa kule nguqulo "eziyisishiyagalombili", "Polish" ne- "square".

I-antenna ka "eziyisishiyagalombili" uhlobo

Libhekisela kudivayisi kalula constructible amisiwe ngokusho uhlobo ejwayelekile eziyisishiyagalombili, kugqame iyasuswa. Indaba enhle kuyinto wire yethusi, kodwa aluminium esebenzayo strip, ekhoneni, tube, isondo, elinye iphrofayli. Usayizi phezulu 140 mm, ingxenye lateral of ubude 130 mm, kodwa lezi Ubukhulu yanikezwa Umhlahlandlela ekukhiqizeni akufanele ukumelana kwabo ngokunembile milimitha.

Ukuze uqale, usike ubude bentambo 112 cm, aqale ukuze agobe Ingxenye yokuqala ubude 140 mm, 130 mm okuyinto uya antenna, futhi 10 mm zingezokunikeza iluphu. Amabili ingxenye eyengeziwe eligoqiwe ubude efanayo 140 mm, lokhu okulandelayo ezimbili - 130 mm, umbhangqwana elandelayo 140 mm, sekulandela esinye futhi isikhali 140 mm, bese - 130 mm, futhi wenze iluphu yesibili. Compounds oyi-sihlanza ehlanganisiwe soldered, kunjalo futhi oxhumana lokukhuphula nengaphakathi ikhebula.

Ehlubula ikhebuli isixhumi senziwa amafayela nommese kanye nenaliti. Ngemva nokunamathisela ngomthofu, kuhlangana ivaliwe futhi sasondelana ingcina kusukela isibhamu ashisayo. Uma sikhuluma ipulaki, kokokunamathisela is batheleka elibona nxazonke ukuvuvukala, bese ku ngalo ingaphakathi cap ke ngokweqile isusiwe. Kwalapho uyahamba ngokuphazima kweso, lokho akwenzekanga elapha mass ingcina. It uphendulela uxhumano okuqinile futhi okuphakade 'azithathe. Ukuze contact thina uhlanza ikhebula uphela ngokudonsa-plug-1 cm kusukela antenna - 2 cm.

Indoor Digital Antenna DVB-T2 ngezandla zabo ngokuqondene ngokujoyina bese livalwa nge-glue, lapho iphuzu contact Kunconywa ukuthi usethe nohlaka eqinile nakho ngeke kusize ku ubukhulu ngokuhlanganyela. Uma insimbi kumele wena okungukuthi isandla esinqunyiwe ekusebenzeni, kodwa ukudluliswa ayidingeki ke uhlaka akusho. Kuvele apharathasi aguqulelwe lolu hlobo kalula iqopha digital izimpawu ngqo umugqa ecashele TV umbhoshongo at ibanga 10 km sangaphandle ukufakwa.

Ukusebenzisa "Polish" antenna

"Polish" isidlo lethiwa phakathi nesikhathi elaliyiSoviet Union njengoba idivayisi esinokwethenjelwa ethola amasignali Soviet ithelevishini kanye neziteshi ku uhla UHF. Ukuthola kusakata ngetinombolo kubahlali ke cishe lwenteke ngenxa kahle encane. Abanye abalandeli ozama ukuletha isakhiwo kuya enhle ngenxa nokufinyezwa kohlelo eside decimeter amadevu futhi asuse kugqame. Ushintsho olunjalo, kwezinye izimo ikuvumela ukulungisa isithombe ngendlela ngesakhiwo digital, kodwa ukuxoxa yibhange imiphumela ezinokwethenjelwa akukwazi. Ukukhuluma ngezinsimbi zomculo Polish, singabona operation qualitative ka amplifier, okuyinto ngempumelelo usebenza nge kusiginali yedijithali.

Antenna uhlobo "square"

Lokhu zasendlini antenna DVB-T2, enziwe ngezandla zakhe, ikhophi sokulungisa design ejwayelekile, eyaziwa ngaphansi kwegama "izikwele ezintathu", lapho kukhona izingxenye eziyisithupha futhi enikeziwe transformer afanayo. antenna Homemade yohlobo ekubhekaneni ngokuphumelelayo iziteshi unethemba yokwamukela format wedijithali at ibanga-10 km emgceni locondzile, ngoba amabanga amade edingekayo amandla isignali.

Antenna design ilula e kuqalisa. I element kwesakhiwo main siqukethe i wire aluminium ka isiyingi cross kwesigaba futhi izintambo okuqinile. I wire uzimisele ngokuba izikwele eziyisithupha afanayo futhi wenze ukususwa emele okusezingeni eliphezulu imvamisa transformer, kuhlangene ikhebula uphawu DVB-T2-antenna kanye amplifier. Izandla enze nokunamathisela ngomthofu ukuze amaphuzu, bona zivuleka bentambo ezazenziwe ngethusi kanye nokunamathisela ngomthofu ludyat.

Ikhebula unamathele antenna ngu izibopho ekhethekile noma esebenzisa abavamile ekuvikeleni tape. Ukunqanyulwa wenziwa ngokubeka ukwesekwa, usebenzisa okhunini noma ezinye izinto. Uma ufaka ngaphakathi noma ngaphandle isakhiwo isimo main kuyinto ukuhleleka okuhle phezu kombhoshongo TV. Lokhu kwenziwa ngokusebenzisa itilosi, uma akukho umugqa obonayo isiqondiso icaciswe ukukhiqiza umphumela isignali enamandla.

antenna apharathasi likabhiya amathini

Ukwenza ubuchwepheshe njengoba antenna ngempumelelo silula futhi akudingi amakhono akhethekile.

Nge ukufakwa kokumqoka kuphela obukhulu noma usungulo wenze imbobo Lihle entanyeni ngayinye amathini amabili bese screwed ku ngezikulufo. Ikhebula semikhawulweni engasithathi aluka zethusi wire ukusikiwa ngommese kusukela ukuvenisha, unamathisele kubo ngaphansi cap ngezikulufo. Kakhulu solder ezinhle okuholela kwakwakhe, kodwa akusho lokho ngempela.

antenna Digital DVB-T2 wenza cishe izandla zabo ahlale phezu wesitimela olungiselelwe noma tube ukulungisa amabhange ukuze ibanga elibahlukanisile uhlala 7.5cm. Eyesibili ikhebula ukuphela ifakwe i-plug esezingeni ongena idivayisi umamukeli efakwe esikhundleni ukulungisa isignali engcono. Ngokufakwa lolu hlobo divayisi mgwaqo Idinga okunokwethenjelwa ukuvikelwa izakhi. Lokhu kwenziwa noma iyiphi impahla manzi, ngokuvamile in the course amabhodlela epulasitiki makhulu. I-antenna uthola iziteshi 15 satellite ithelevishini kanye kusakata ngetinombolo kubahlali.

Ukusebenzisa amathuluzi futhi okhulisa

Ngezinye ibanga elithile kusuka ithelevishini umbhoshongo antenna chweba amasignali ngaphandle kokuba ukufaka kumadivayisi angeziwe abalwazi kahle ulimi. Ukuze ethola isiginali kusuka omkhulu ibanga Stocking wave amplifier ezinemigomo yokuphepha ehlukanisiwe ugesi. Idivayisi wanelisa eduze Sombhalo, kanye ukuxoxisana iyunithi kwenza uhlelo ezengeziwe, adingekayo ukuze ukukhiqizwa yayo:

• a potentiometer ushintsha inzuzo;
• Standard cheeky ESIKLINYAYO L4 futhi L3;
• lamakhoyili ohlobo L1 futhi L2 kuthiwa nilimaza ubukhulu lwemibhalo;
• isihlangu ezenziwe metal ekwehlukaniseni izifunda okukhiphayo kusukela wesifunda yomculo.

Yokukhulisa umsindo owafaka 3 metres endaweni lapho antenna efakwe DVB-T2 ikhebula, oxhumana yayo ikhebula antenna ukuthola amandla kusuka block lalo. Uma ufaka i-antenna eduze umbhoshongo yezokusakaza, it is hhayi Kunconywa ukusebenzisa-amplifier eyengeziwe, njengoba isignali enamandla elilulaza isithombe futhi inikeza eyengeziwe umthwalo electronic kuyo yonke isakhiwo. Kunconywe ikhebula Ubude ngamamitha amathathu, ngaphezulu wire asihole unbalance symmetrizer.

Isicelo symmetrizer

Leli thuluzi lomculo kuyadingeka noma luphi uhlobo antenna, awusebenzi ukudlala indima, senze ukuba ifektri noma workshop sezingcweti. Antenna ngoba DVB-T2, enziwe ngezandla zakhe, ukhiqiza ezinhle izithombe izinga, uma ixhunywe Sombhalo. Uma ubude ikhebula 10 m, isakhiwo ukufakwa ngaphandle nokushintshashintsha kuphakama emkhathini kanye ukumelana ikhebula. Kulokhu, ufuna ukusebenzisa olunzulu isixazululo symmetrizer antenna ipulazi, ethuthukisa kakhulu izinga isithombe sesikrini.

cabling futhi ukufakwa kwe-antenna

Umthetho oyinhloko ukufaka antenna endaweni ephakeme. Uma lokhu kungeke kwenzeke endlini, udinga ukuhambisa idivaysi udonga lwangaphandle. Ukufaka i-antenna e isakhiwo ethile ukusakaza digital opharetha ancike ukuphakama apharathasi 10 metres. Uma-antenna itholakala esitezi sokuqala yendlu ke ukuba metallic izakhiwo eziseduze, izinto zezimboni kubangele nokucekelwa reception.

Lapho-antenna indawo ngaphansi kombhede noma ophahleni ukunakwa endlini pay nendaba ukufulela - ke akufanele ibe enamathela metallized noma sishaye kwengoma. Metal, lukathayela, yensimbi ucwecwe noma ukwahlukanisa pose ukuphazamiseka okukhulu yokwamukela amasignali ithelevishini digital.

Ngokuba njengamazulu ephakeme reception antenna ngokufanele kwi insika metal noma pin zihlanganisa usayizi steel nengaphakathi imitha engaphansi, okuyinto ixhunywe wire isisekelo. Iyunithi, esisogwini ophahleni, faka jikelele uhlelo ekhaya phansi.

Ikhebula akuyona kukhishelwa nge- flue futhi air Amapayipi, musa hang on the izintambo ekhona kagesi, ngisho noma kubonakala ezingaphezu kuka ephephile. Izimbobo ezindongeni we enyakazayo, ukuze umswakama emgwaqweni noma engena ekamelweni, zisebenzisa Imigudu ekhethekile okuyizinto ayatholakala emakhemisi. Uma-antenna senziwa zwí futhi ngendlela efanele, thatha ikhebuli eliphezulu odongeni nezinyawo, ngoba ngemva kokuphothula izindonga kunzima ukushintsha ikhebula ku odongeni, esikhundleni saso alethe athembeke kakhulu.

Ukuhambisana nokuphepha ngesikhathi inhlangano yabantwana bakwa-antenna

Ngaphambi kokufaka noma ngemva kokuthinta noma kakade likhuliswe antenna phezulu, qiniseka ukuthi lo msebenzi iphephile:

• Musa ukugibela ababuthakathaka esintengayo isakhiwo esithile, uma umsebenzi eziphakeme ezihlobene ingozi, qiniseka ukubeka phezu ibhande obandayo bese ulinamathisela ingxenye esimisiwe isakhiwo isakhiwo;
• akuvumelekile ukubamba ekupheleni le obandayo ibhande umsizi ngaphandle ukuvikela ke kusengaphambili, lapho ewa isisebenzi akaphinde asibalele ezandleni esisindo;
• Musa ukugibela ukuphakama wedwa, uqweqwe lukashukela imiklamo, ukuhamba phezu kophahla ubudala, isinyathelo ku emalungeni yokuxhuma;
• Musa ukufaka antenna ku yemvula nenkungu.

Ekuphetheni, kulula kakhulu ukwenza umamukeli akho ukubukela ithelevishini digital. DVB-T2 - antenna, enziwe ngezandla zakhe - ikhwalithi (uma ulandela ubuchwepheshe ngakwesokudla) cishe hhayi eliphansi kuya ukugcina-wathenga nozakwabo. Izindleko zokwakha kuzosiza ugcine imali efanele imali, okuyinto ebaluleke for abanye abantu.