Frequency ukuphambuka

Ubuninzi - le yenye iimpawu awo le oscillations wobungakanani ngokwasemzimbeni malunga nexabiso layo abangenagama. Physics, zininzi iintlobo intlokoma yendalo eyahlukileyo, umzekelo, ukuhla nokunyuka endle electromagnetic. Ukongeza kumaza ezikhululekileyo kagesi imvelaphi zendalo, kukho ukuhla, kukuvela elinikwa ngokuthanda komntu ukusombulula iingxaki ezithile ezivela iimfuno zezinto ezenziwa luluntu. Kaninzi ngokusebenzisa iinkqubo oscillatory kuqwalasela imiba transfer kunye / okanye ulwazi amandla, ie Kungenxa communication, unomathotholo, umabonakude kunye nomsebenzi, njl

Inkqubo ekudluliseleni ulwazi iquka ukulungiswa intsimi amandla ehambelana kwezwi lwalo uphawu kuluncedo kwaye odala samaza carrier kumaza amaxabiso parameter echazwe - awo kunye rhoqo. Eyokuqala i parameter ngokomlinganiselo endle amandla, kwaye imisela umgama transmission, kwaye eyesibini - lowo uthunyelwe. Kweli nqanaba siye kuphela uphawu carrier, enza indima 'umthuthi "data.

Isiqulatho ulwazi wasendle amandla yaziswa umqondiso lutshintsho ohambelana naziphi na iparameters yayo. Ukuziqhelisa, sebenzisa iinketho ezahlukeneyo ukulungisa imida endle - kwaye le nkqubo ibizwa ngokuba kwezwi carrier frequency. Kulo mzekelo, utshintsho sifakwa carrier, okanye awo le kutenxa carrier frequency. Kwinqanaba lokuba unomathotholo esetyenziswa rhoqo Painter, apho ulwazi uqulathwe ku awo yomqondiso yenethiwekhi. Utshintsho kwi yenethiwekhi awo accuracy
Ulwazi ngokuphindaphindiweyo uphawu analog. Umxhasi esifumana i SIGILL uphawu
ngenxa yokubakho qho carrier, uze emva koko yabela demodulator equlathwe kulo
ulwazi. Xa amaza phantsi, phezulu ukuya uluhlu elifutshane yomtshangatshangiso, esebenzisa ngokuguquguqula kuphela awo. Ububi yaso na utshintsho kwi awo yobuninzi carrier, ngenxa apho uphawu - ratio ingxolo, kungasisalathisi esibalulekileyo sokuba umgangatho ijelo lonxibelelwano lifinyele.

Kwakhona ke kwezwi awo, yokudlulisela inkcazelo isetyenziswa kwaye rhoqo apho unxaxho frequency iyasetyenziswa. Inzuzo zobungakanani
kwezwi - ingxolo sifo ephakamileyo, ukuze professional
Iinkqubo zoqhagamshelwano zisetyenziswa ikhala kuphela chastotnomodulirovannye. Umzekelo isicelo lwemiqondiso ezinjalo - VHF unomathotholo, umabonakude, unxibelelwano okhethekileyo.

Umahluko - ubuninzi carrier frequency utshintsho xa kuthelekiswa nomyinge ukubaluleka kwalo. LwaseNtshona Koloni ziba phinda-modulated carrier oscillation kuxhomekeke awo yomqondiso luncedo kunye namandla awo lawo kuye, apho uzinzo uqhagamshelo liphezulu kakhulu ekuqaleni.

amaza yenethiwekhi izixhobo frequency kwezwi kuthiwa uphawu modulators. indima yabo ekudluliseni iisignali zerediyo - ukulawula generator samaza carrier frequency. Imisa kuphambuka frequency
iimfuno Ububanzi le bandwidth bobabini sixhobo kunye receiver.

Ekubeni imfuneko siphambili ijelo lonxibelelwano - mhlawumbi transmission echanileyo ngakumbi uphawu lokuqala, i-bandwidth le iisekethe igalelo-output yomfumani kwaye samaza kufuneka ubuncinane kabini ixabiso bandwidth uphawu yokuqala. Noko ke, apha kufuneka sikhangele ukuba "kuthetha yegolide", ngokuba kubangela ukutenxa kwicala samaza ngokweentlanga kufumaniseka ukuba aba ezinxulumene oscillations olwaye lwamfimfitha ezibangelwa radiation zangaphandle zombini ezilayishayo, kunye nokudalwa uphazamiseko ngabom, njengoko enye indlela aqhubana ngayo ubugqwetha eso umqondiso - nomqathango bandwidth. Ngokuqhelekileyo uthethe ubudlelwane phakathi main
iimpawu kuphambuka - kwaye gungqa band ububanzi spectrum uphawu ngesondo.

Ukuba ekwandiseni kwezwi kuba nexabiso elikhulu, zombini parameters, nto leyo
lubonakala unxaxho kwamaza, unamalunga ubukhulu efanayo. Ukuphambuka kulinganiswa ngeeyunithi zobungakanani Hz.