Radio - Yini leyo? Umgomo we ukudluliswa isignali

Hhayi bakutshele ukuthi kubaluleke umsakazo emhlabeni namuhla. Kuyini lokhu? Inchazelo Lithi kuyinto eyodwa yokudlulisela amasu ibanga ngokusebenzisa amagagasi kagesi. Ngokuvamile, leli gama lisikisela idivayisi yasungulwa ososayensi Russian Popovym Aleksandrom Stepanovichem 1895. Futhi kusukela lapho, ke akalilahlile ngokuhlathulula ukusebenza kwawo.

Ngena umlando

izindaba zomsakazo empilweni akukwazi abantu overstated. It yadalwa ososayensi Russian idivayisi kwasindisa izimpilo kusukela baphihliza we "Titanic" - babefanele zithumela umlayezo wokutakula.

A. S. Popov waqala ukuhlola kwakhe emuva ngo-1889. indlela yakhe wamisa phezu nakho kwenziwe usosayensi German amagagasi Genriha Rudolfa Hertz kagesi, phakathi kwesikhathi lapho kwaba ukufeza ukubukeka okuphawulekayo kwamandla Sparks. Ngo-1894, i-Popov aklame idivayisi lokuqala.

Ngemva kwesikhashana khona lamhla nomsakazo wodwa lo. Lokhu kwenzeka ngo-1895. Ukufuna ukuthuthukisa amasignali emasimini kagesi, umsunguli isebenzisa into resonance. Futhi ukubhaliswa amasignali ngocansi osebenza coherer - ngamapayipi ingilazi zensimbi imvuthuluka, okuyinto angashintsha ukumelana layo. Kusukela ngaleso sikhathi iqala ngenkathi umsakazo ubuchwepheshe.

Umgomo we ukudluliswa isignali

Zonke ezweni lanamuhla zisekelwe izimpahla ezisebenza ngogesi, okuyinto ilawulwa amasignali omsakazo ngoba amandla. Futhi ukuze baqonde ukuthi umsakazo, kufanele baqonde izimiso wokusebenza zedivayisi.

Ohlangothini okuxhunyanwa yakha isignali imvamisa high othwala imvamisa ezithile, okuyinto ke esikhulu ukugeleza ulwazi. Ingabe modulated. indlela United ngamagagasi omsakazo esikhishwa antenna okuxhunyanwa agelezela isikhala.

isignali kudivayisi Bebona

Indawo ezikude isignali umthombo othunywe antenna umsakazo eyamukelayo udliwa. Lesi sinyathelo uphawula omsakazo signal processing ukuthi kwenzeka ngezigaba:

1. Iyehla iyenyuka emasimini kagesi edonsa imisinga kagesi owamukelayo.
2. Low-amandla kagesi ehlungiwe ukuqeda kokuthikanyezwa, futhi nokuthungatha ukuhlonza imininingwane ewusizo.
3. amasignali "Purified" kuthiwa ukukhishwa, itholiwe, ulwazi oluwusizo ikhishwe.
4. Iguqulwe ibe iqoqo umbono zedivayisi ngomsindo, isithombe, ividiyo umsakazo-friendly.

Ezimweni eziningi, ngaphambi kulungiswa isignali sidlula inqwaba amadivaysi - yokukhulisa umsindo, imvamisa converters - futhi ngaphansi digitizing kuhlelo lokucubungula. Futhi kuphela ke siyokwazi ukuqonda ulwazi etholwe umsakazo. Lokhu kanyekanye ithuthukisa bezibona izinga kanye nokwaziswa.

Radio ezweni lanamuhla

Kuleli zwe lanamuhla, umsakazo ilahlekelwe kwayo - ukulalela umculo, ukuxhumana nezihlobo esekude, ukuthola izindaba esetshenziswa tech zobuchwepheshe. Kodwa eminyakeni engu-40 edlule lentwana umthombo oyinhloko wolwazi ukuzijabulisa. Radio kusihlwa eside babebuthana benze umndeni, abangane, amaqembu.

Isiteshi somsakazo lokuqala yabuya ngo-1907 eNew York. Lee De Ihlathi wenza umbhoshongo ukusakaza. Nokho, njalo siguqula indawo umsakazo. It kwawukhinyabeza ukukhula ukuthandwa kule ndlela entsha ukuzijabulisa. Eminyakeni eyishumi kamuva esiteshini kwaqala ukubonakala emazweni aseYurophu - eCzechoslovakia, Ireland, eHolland. Ngemva yalolucwaningo 20, zingabantu okwandile. Futhi ukuthuthukisa kuze kube yilolu suku.

Manje ethandwa kakhulu emsakazweni Inthanethi. Kuyini lokhu? Eqinisweni, ukusakaza umculo esifanayo, izindaba, kodwa ibanga ngobulili ngokusebenzisa zenethiwekhi yezifiso global. Kodwa ngenxa ukuthuthukiswa okuqhubekayo idatha ukuxhumana, futhi ngokushesha le ndlela Broadcasting siqedwa ezimpilweni zethu.