Imvamisa ukuphambuka

Imvamisa - lokhu ingenye izici amplitude oscillations okukhishwa ngokomzimba ngenhlonipho enanini layo kusho. Ngo-physics, kukhona izinhlobo eziningi kunyakaza bemvelo ezahlukene, isibonelo, iyehla iyenyuka emkhakheni kagesi. Ngaphezu amagagasi nokuguqulwa kagesi odabuka yemvelo, kukhona iyehla iyenyuka, okuvela kuyo onikelwa ngentando yomuntu ukuxazulula izinkinga ezithile ezivela nezidingo zomsebenzi womuntu. Ngokuvamile esebenzisa oscillatory izinqubo balwe yokudlulisa amandla kanye / noma ulwazi, okusho Kuyinto ekuxhumaneni, umsakazo, ithelevishini kanye umsebenzi, njll

Inqubo yokudlulisa ulwazi kuhlanganisa ukulungiswa elihambisana field energy nokuguquguquka kwezwi layo isignali ewusizo futhi odala Lidlulisela yenethiwekhi imvamisa kuchazwe wepharamitha - amplitude futhi imvamisa. Umngcele we sokuqala wakhona field energy, futhi inquma ibanga transmission, kanye nezimboni yesibili - ekhelini. Kulesi sigaba esinalo isignali yenethiwekhi kuphela, enza indima idatha "umthuthi".

Okuqukethwe ulwazi amandla nkambu busuka isignali ngumuntu koshintsho oluhambelanayo yimiphi imingcele yayo. Ngo umkhuba, sebenzisa ongakhetha ahlukahlukene ukuthi lushintshe imingcele ensimini - futhi le nqubo ibizwa ngokuthi ukushintshashintsha kwezwi yenethiwekhi imvamisa. Kulokhu, ushintsho sisetshenziswa yenethiwekhi, noma amplitude we ukuphambuka yenethiwekhi imvamisa. Ngesikhathi sigaba yokuba umsakazo Balisebenzisa amplitude bashintshashintshe izwi, bahlabe lapho ulwazi oluqukethwe amplitude we isignali yenethiwekhi. Izinguquko e yenethiwekhi amplitude ukunemba
Imininingwane okuphindaphindiwe isiginali ye-analog. Umthengi uthola isignali
ngesisekelo imvamisa yenethiwekhi, bese inike demodulator ezikuyo
Imininingwane. Ngezinye imisindo ephansi, kuze uhla iDemo wave usebenzisa ukushintshashintsha kwezwi amplitude kuphela. kusimo wayo lomkhulu ushintsho amplitude we imvamisa yenethiwekhi, ngenxa lapho isignali - isilinganiso umsindo, i Isikhombisi esibalulekile izinga isiteshi zokuxhumana kuyehla.

Futhi le ukushintshashintsha kwezwi amplitude, ngokudlulisa ulwazi esetshenziswa futhi imvamisa lapho ukuphambuka imvamisa isetshenziswa. Buhle imvamisa
Ukushintshashintsha kwezwi - ephakeme umsindo amasosha omzimba, ngakho lochwepheshe
Nokuxhumana izinhlelo asetshenziswa amasignali kuphela chastotnomodulirovannye. Isibonelo kwesicelo signal ezinjalo - VHF radio, ithelevishini, zokuxhumana ekhethekile.

Ukuphambuka - esiphezulu yenethiwekhi imvamisa ushintsho isihlobo isilinganiso ngokujulile ukubaluleka kwaso. Nomkhakha we imvamisa-modulated yenethiwekhi oscillation incike amplitude we isignali ewusizo futhi amplitude yayo akusho ziyahlukahluka, lapho uxhumano ukuzinza iphakeme kakhulu kunanoma ekuqaleni.

nobuningi isithwali amadivaysi imvamisa ukushintshashintsha kwezwi abizwa ngokuthi isignali modulators. indima yabo ukudluliselwa amasignali omsakazo - kokulawulwa generator Lidlulisela yenethiwekhi imvamisa. Inquma ukuphambuka imvamisa
izimfuneko ububanzi bandwidth kokubili Transmitter kanye umamukeli.

Njengoba imfuneko esiyinhloko isiteshi zokuxhumana - mhlawumbe wadluliswa ngendlela enembile ngaphezulu isignali yokuqala, bandwidth we izifunda okokufaka-okukhipha owamukelayo kanye Lidlulisela kumele okungenani ibe kabili ukubaluleka original isignali-bandwidth. Nokho, lapha kufanele ubheke "kusho osemqoka", ngoba izimbangela ukuphambuka ohlangothini Lidlulisela zingahlanganiswa oscillations yisinanakazana kubangelwa emisebeni nezingahlobene nendaba kokubili pickups, kanye kudalwa ukuphazamiseka ngamabomu, njengoba enye indlela asebenzelana ngayo njalo phendulela isignali - umkhawulo we-bandwidth. Ngokuvamile ukukhuluma ngobudlelwane phakathi kwamakhamera ocingo
Ukuphambuka izici - kanye unyakazisa band ububanzi nomkhakha we isignali ngocansi.

Uma izinkomba ukushintshashintsha kwezwi kunenani elikhulu, kokubili imingcele, okuyinto
elinesimo ukuphambuka imvamisa, cishe ubukhulu efanayo. Ukusuka kulinganiswa amayunithi imvamisa Hz.