Isitsha sesathelayithi sinezinzuzo eziningi ngaphezu
kwamanye ama-antenna ngokuya ngekhwalithi yomsindo odluliswayo nesithombe. Izimpondo zesathelayithi zihlukaniswe zaba yi-offset kanye ne-direct-focus (i-toroidal ku-
satellite ye-TV yababhalisile isetshenziswa kakhulu), ngayinye enezinzuzo zayo kanye nokubi. Lesi sihloko sikhuluma ngomehluko, ukufakwa, ukusebenza kwalezi zinhlobo zamapuleti. [i-id yamagama-ncazo = “okunamathiselwe_3556″ align=”aligncenter” wide=”600″]
Izinhlobo zezitsha zesathelayithi[/caption]
Yiziphi izitsha zesathelayithi ezigxilile neziqondile
Ama-antenna anenkundla yesibuko ahlukaniswe abe ukugxila okuqondile nokuqondile. Zombili ziyizitsha ze-parabolic ezibukwayo, kodwa zinokuhluka okukhulu. I-antenna ye-offset ayihlinzekwa kakhulu njengeyesibili. Kukhona elinye igama lama-antenna agxile ngqo – i-axisymmetric, njengoba ukulinganisa kwawo kwakhiwe eduze kwe-eksisi eyodwa. Isibuko sabo siyi-paraboloid yenguquko, umumo uyindilinga, isakhiwo sinomthelela ekuqondaneni kwe-axis yejometri nekagesi. Ku-axis efanayo kukhona
isiguquli esixhunywe emaphethelweni e-reflector ngokwakhiwa okukhethekile. [i-id yamagama-ncazo = “okunamathiselwe_3559” align = “aligncenter” wide = “400”]
Isitsha esigxile ngqo [/ amazwibela] I-antenna ye-offset ibonakala isikwe ku-parabola. I-paraboloid ivamise ukuphambana nesilinda. Izimbazo zabo zihlala zihambisana. Isibuko se-antenna esinjalo sinesimo se-elliptical, futhi i-eksisi kagesi ichezuka nge-engeli ethile ukusuka kweyojometri. [i-id yamagama-ncazo = “okunamathiselwe_3562” align = “aligncenter” wide = “400”]
I-offset antenna [/ amazwibela] Zombili izinti zinezinzuzo kanye nokubi. I-antenna egxile ngqo ivumela ukusetshenziswa kahle kwendawo yesibuko. I-antenna ye-offset inesakhiwo esihluke kancane. Ukuze uthole indawo ephumelelayo, umuntu kufanele aphindaphinde okungokoqobo nge-cosine ye-engeli phakathi kwezimbazo ezimbili: zikagesi nezejiyomethri. Kodwa nge-antenna egxile ngqo, ucezu olubalulekile lwangaphezulu lusithwe isiguquli kanye nokunyuka kwaso okuhambisanayo, okungasebenzi kwezinye izinhlobo zezimpondo. Ngakho-ke, ama-antenna aqondile ngokuvamile abamakhulu impela. Ku-antenna e-axisymmetric, ephakanyiswe i-engeli ethile ephozithivu, imvula iyanqwabelana. Ama-antenna e-offset afakwe cishe aqonde phezulu noma atshekele phansi, futhi awaqoqi imvula ngokwawo. Kodwa, njengoba isiguquli sibheka phezulu, kufanele senziwe singangenisi umoya, ukuze amanzi angangeni. Enye inzuzo ye-antenna ye-offset ukuthi isikhungo sonke samandla adonsela phansi sigudluzwa phansi ngenxa yebakaki nesiguquli, okwengeza isisindo phansi. I-antenna eqondile eyenziwe ekhaya:
Ungalufaka kanjani futhi ululungise kanjani uthi lwe-offset
Ama-antenna e-offset anokugxila okushintshile ngoba isibonisi si-oval. Lawa ma-antenna masha, akuvumela ukuthi ubeke isiguquli sesibili ngisho nesesithathu, esithola okwengeziwe ngesathelayithi, kuye ngokuthi ukuphi. [i-id yamagama-ncazo = “okunamathiselwe_3457″ align=”aligncenter” wide=”508″]
Okubizwa ngokuthi udrako ukudla kwesathelayithi okushuthelwe kumasathelayithi amathathu adumile u-Amos, Astra kanye ne-HotBird – lokhu kungenzeka kuphela esitsheni se-offset[/caption ] Kubalulekile ukuthi indawo yayiseduze. “Isibuko” salolu antenna sigxilisa isignali kusiguquli. Kuyo, isignali iba ngaphansi kwemvamisa nge-oscillator yendawo yokuguqulela. Ukuhamba
ngekhebula, isignali iya kushuna, futhi isamukeli sesathelayithi samukela isignali esidlula kusathelayithi, siyicubungule, siyihlukanise, futhi siyithumele ku-TV ngendlela “yesithombe” esiqediwe. [i-id yamagama-ncazo = “okunamathiselwe_3554″ align=”aligncenter” wide=”800″]
Isikhombisi-ndlela esiqondiswe ku-offset nezitsha zokugxilisa ingqondo[/caption] Uma amasathelayithi esondelene, abonwa ngothi olulodwa lwe-offset lapho kukhona ezimbili. noma iziguquli ezintathu. Iziguquli ezengeziwe zinamathiselwe kusetshenziswa ama-multifrid. Kwesinye isikhathi kuyenzeka kumiswe amasathelayithi amane. Cabangela ukufakwa kwamasathelayithi amathathu. Ukufaka
uthi , kuyadingeka ukunquma ukuthi amasathelayithi aku-orbit. Kunezinhlelo
namadivayisi anquma indawo, kodwa ungakwazi ukuzulazula ngamapuleti aseduze. [i-id yamagama-ncazo = “okunamathiselwe_3462″ align=”aligncenter” width=”680″]
Ukulungisa i-azimuth nokuphakama kwesitsha sesathelayithi[/caption] Ake sicabange umzila njengebhuloho eliyiconvex. Isiguquli sokuqala sifakwe kwisathelayithi ephakathi nendawo. Iziguquli eziseceleni zibekwe ngokuhambisana nesithombe sesibuko, okungukuthi, lapho isathelayithi ingakwesobunxele nangaphezulu, isiguquli sibekwe ngakwesokudla nangaphansi kwesikhulu. Kubalulekile ukuthi kungabikho izithiyo endleleni ngendlela yezihlahla, izindlu ezinde, njll. [i-id yamagama-ncazo = “okunamathiselwe_3472″ align=”aligncenter” width=”450″]
Ukukhetha indawo efanele yokufaka isitsha sesathelayithi kuwumsebenzi wokuqala[/caption] Ukufaka isitsha sesathelayithi:
Okokukhweza odongeni kwepuleti le-Offset[/caption]
Qaphela! Kungcono ukufaka sonke isakhiwo sendlu bese usilungisa entabeni yodonga.
I-converter ephakathi ibekwe kubakaki futhi i-multifeeds ifakwe lapho iziguquli eziseceleni zinamathiselwe khona. Okokuqala, sibeka i-multifeed ye-satellite ephakeme kakhulu (uma ubheke i-antenna, ingakwesokunxele), izinsimbi zifakwa ku-arc, zidonswe ndawonye, izibophelelo ngendlela yendandatho kufanele zibekwe ngakolunye uhlangothi. yale bar, ithubhu yensimbi ibekwe lapho, lapho abaguquli bebanjelwe khona. I-converter ibekwe ku-multifeed. Izungeziswa cishe ngamadigri ayi-100 ngokuphambene newashi. Isigaba esisodwa ngokuvamile silingana namadigri amahlanu. Uxhumano lwezintambo – ngehora lesithupha. Imininingwane yokuthi
ungasetha kanjani isidlo sesathelayithi .
Qaphela! Lapho ufaka amasathelayithi empumalanga yeningizimu, isiguquli kufanele sigoqwe ngakolunye uhlangothi.
Setha iziguquli zesibili nezesithathu ngendlela efanayo, ngenani elincane lamadigri. Siqinisa esikufakile. Kodwa udinga ukukwenza ngaphandle kokushiseka, ukuze ungadlulisi ngesikhathi somzamo. Silungisa izingcezu ezintathu zocingo, sizihlanze futhi siwasonte kuzixhumi ze-F, sihlanze iziphetho zezintambo emabhokisini enjoloba avikelayo, sibeke lezi zixhumi. Ukusetha isidlo sesathelayithi:
- Ekuqaleni komsebenzi, udinga ukufaka isathelayithi eyinhloko. Intambo esuka kusiguquli ixhunywe kokokufaka 1 kwe-DiSEqC, kusukela ekuphumeni kwe-DiSEqC switch “Receiver” ikhebula lixhunywe kokokufaka kwesamukeli (ishuna) futhi okokusebenza kushunwe kusathelayithi esiyidingayo ngendlela ethile. icala. Ngale njongo, isamukeli sesathelayithi sifakwa ku-TV ngamapharamitha adingekayo. Ifrikhwensi oyifunayo isethwa mathupha.
- Uma isignali ethi “LEVEL + QUALITY” ivela, udinga ukugxila ku-“QUALITY”. I-antenna emile ijika ijikela kwesokudla nakwesokunxele, uma ingekho isignali, umthambeka uyashintsha. Uma isignali ibanjwa, sifinyelela ubuningi. Bese siqala Ukuskena futhi sibone ukuthi sikhethe isathelayithi efanele yini.
- Siqinisa amantongomane okulungisa.
- Sixhuma isiguquli kokokufaka okufunayo.
- Sixhuma inkinobho ye-DiSEqC.
- Kumenyu yesamukeli sesathelayithi kumodi “yokufaka i-antenna”, sesikhethe izilungiselelo zokuguqula, sibeka i-DiSEqC sivula amasathelayithi.
- Kumodi “Yokusetha Okuzenzakalelayo”, siskena wonke amasathelayithi. Kudingeka sibheke ukuthi zibanjiwe yini. Uma konke kuhamba kahle, ungabuka i-TV.
Izinhlobo eziyinhloko zezitsha zesathelayithi: https://youtu.be/46D9LqMqbzo
Ungalufaka kanjani futhi ulusethe kanjani i-antenna eqondile
Umgomo wokufaka uyafana, kodwa ukusetha kuhluke kancane. Udinga ukuthola
ukuphakama kanye ne-azimuth . Angabalwa nge-calculator eku-inthanethi. Tadisha imenyu, kunesigaba “Izinga lesiginali”, esibonisa imingcele ebalulekile njengokuthi “Izinga” kanye “Nekhwalithi”.
Sihlanganisa i-antenna. Ekuqaleni, imininingwane ibukeka kanje:
Hlanganisa isibonisi. Uma kukhona amawasha, kufanele afakwe. Uma umklamo unamandla, kungcono, udinga ukusebenzisa zonke lezi zimfanelo.
Sixhuma ama-halves ngosizo lwama-clamps namantongomane.
Sihlanganisa isakhiwo sokusekela, sibophe umlenze nge-clamp.
Khetha izinsimbi. Okulandelayo, udinga ukusetha ipuleti emlenzeni. Khona-ke sonke isakhiwo siyahlanganiswa, imilenze yayo efana nesicabucabu. Ipayipi elingaphakathi kufanele liphume cishe ngamamitha ama-2. Isilinganiso emilenzeni, uma sikhona, sibekwe endaweni ethile ku-38-40. Ukusetha isidlo sesathelayithi esigxile ngqo kumasathelayithi amabili i-Yamal (90) + ABC (75): https://youtu.be/4vixVSd_-RY
Izici zokusebenza
Kwesinye isikhathi isignali ye-antenna iba buthaka kakhulu. Khona-ke udinga ukuhlola ukuthi izibuko zepuleti zikhubazekile ngendlela yokuthi ifane nesibalo sesishiyagalombili. Kubalulekile ukuthi, uma ubheka isibonisi esihambisana nokuvula, imiphetho ihlangane ibe umugqa owodwa. Uma umamukeli engasebenzi kahle, udinga ukuthenga entsha. Kwesinye isikhathi kuyadingeka ukuthenga isiguquli esinomsindo ongabalulekile kangako. Kwesinye isikhathi ungathenga enye ikhophi yenqwaba efanayo. Kubalulekile ukuthi okuphakelayo kwesiguquli kuhambisane ne-f/d yesibonisi. [i-id yamagama-ncazo = “okunamathiselwe_3548″ align=”aligncenter” width=”512″]
Ukucaciswa[/caption] Ungahlola ubude bendawo njengoba isiguquli sisondela futhi sisuka kusibonisi.
Iqiniso elithakazelisayo. Kabili ngonyaka, ekwindla nasentwasahlobo, ilanga livela ngokuhambisana nesathelayithi kanye ne-antenna eyamukelayo. Khona-ke imisebe yelanga isesiguquli kanye nesignali yesathelayithi. Lokhu kwehlisa izinga lesignali. Lokhu kungalimaza imishini. Ngakho-ke, kuyadingeka ukubeka ikhadibhodi noma isikrini se-polyethylene (opaque) phambi kwe-irradiator ngesikhathi.
Indlela yokukhetha ipuleti lemisebenzi yakho
I-antenna ngayinye inhle ngendlela yayo. I-Offset ilungele ukuyifaka odongeni. Abatholi iqhwa nemvula. [i-id yamagama-ncazo = “okunamathiselwe_3294” align = “aligncenter” wide = “617”]
I-antenna ye-parabolic ivamise ukuhlotshaniswa nesathelayithi [/ amazwibela] Kodwa uthi olugxilile lunendawo kagesi ekuphakeleni, engenazo zonke izinhlobo zokuhlanekezela, okuthinta isithombe ngendlela enhle. I-antenna ye-offset ayithinteki imvula. Inesikhungo samandla adonsela phansi esimiswe ngezansi. Kodwa i-antenna egxile ngqo inikezwa ngezinga elikhulu. Ngakho-ke, kukubanikazi ukuthi banqume ukuthi iyiphi i-antenna okufanele bayikhethe. Ngokwezinga elithile, kulula kakhulu ukusebenzisa i-offset plate, ikakhulukazi njengoba ikhethwa ezindlini zangasese. Kodwa ngesikhathi esifanayo, zombili izimpondo zinhle ngendlela yazo. Uma befisa, abaningi bayakwazi ukuvikela uthi olugxile ngqo emvuleni. Kwanele ukuvikela i-irradiator yokuguqula ngokwayo nge-visor encane evela ebhodleleni lepulasitiki. Ngakho-ke, kokubili okuhlukile kwamapuleti kuhle ngendlela yabo, kuyadingeka ukuqhubeka nesimo somuntu ngamunye.
Isiphetho
Ngakho-ke, izitsha zesathelayithi, ezigxilile futhi zigxile ngqo, zombili zibamba amasiginali wesathelayithi ngokuphelele, lokhu ukufana kwazo. Zihlukene ngesimo futhi ngokwengxenye ukuma kwe-paraboloid, okungukuthi, i-antenna ye-offset ime engeli efanele, futhi i-antenna yokugxila eqondile itholakala ngokuvundlile. I-antenna ye-offset ivikeleke kangcono kuzo zonke izinhlobo zemvula, futhi inesikhungo esingcono samandla adonsela phansi, nakuba isitsha se-axisymmetric sinendawo engasontekile ye-electromagnetic.
