Lapho sidlulisela isignali, kungakhathaliseki ukuthi isignali yokubona, isignali kagesi, noma isignali engenantambo, uma idluliselwa ngokuqondile, isignali iphazanyiswa kalula umsindo, futhi kunzima ukuthola ukwaziswa okunembile ekugcineni kokwamukela. Ukuze kuthuthukiswe ikhono lokulwa nokuphazamiseka kohlelo, kungenziwa ngokushintshanisa isignali. Ukushintshashintshashintshashintshashintshashintshashintshashintshashintshashintshayokungawasebenzisa kangcono amashaneli, ngakho-ke kunomthelela omkhulu ekutheni izinhlelo zokuxhumana zisebenza kahle futhi ngendlela enokwethenjelwa.
Ukushintsha i-engeli okuchazwe ngezansi okwezimpawu ze-analogue.
Umthwali we-sinusoidal unemingcele emithathu:amplitude, imvamisa, kanye nesigaba. Singakwazi ukulayisha ulwazi lwesiginali eshintshiwe hhayi kuphela ekushintsheni kwe-amplitude yesiphathi kodwa futhi nasekushintsheni kwemvamisa noma kwesigaba sesithwali. Ngesikhathi sokuguquguquka, uma imvamisa yenkampani yenethiwekhi ihluka ngesignali yokushintshashintsha, ibizwa ngokuthi i-frequency modulation noma i-frequency modulation (FM); uma isigaba senkampani yenethiwekhi sihluka ngesignali yokushintshashintsha, kubizwa ngokuthi i-modulation yesigaba noma i-modulation yesigaba (PM) Kulezi zinhlobo ezimbili zezinqubo zokuguquguquka, i-amplitude yenkampani yenethiwekhi ihlala injalo, futhi ukuguqulwa kwemvamisa nesigaba kuboniswa njenge ukuguqulwa kwesigaba esisheshayo senkampani yenethiwekhi. Ngakho-ke, ukuguquguquka kwe-FM kanye nesigaba sekuhlangene kubizwa ngokuthi i-engeli modulation.
Umehlukophakathi kokuguquguquka kwe-engeli nokuguquguquka kwe-amplitude ukuthi i-spectrum yesiginali eshintshiwe ayisekho ukushintshwa komugqa we-spectrum yesiginali eshintshiwe yasekuqaleni, kodwa ukuguqulwa okungaqondile kwe-spectrum, okuzokhiqiza izingxenye ezintsha zefrikhwensi ehlukile ku-spectrum shift, ngakho-ke kubizwa nangokuthi. ukuguquguquka okungekona komugqa.
FM kanye PMzisetshenziswa kakhulu ezinhlelweni zokuxhumana. I-FM isetshenziswa kakhulu ekusakazweni komculo okuthembekile, ukudluliswa kwesignali yomsindo we-TV, ukuxhumana ngesathelayithi, nezinhlelo zezingcingo zamaselula. Ngokungeziwe ekusetshenzisweni ngokuqondile ekudluliseni, i-PM iphinde isetshenziswe ngokujwayelekile njengoshintsho lokukhiqiza amasignali e-FM ngokungaqondile. Kunobudlelwane obuseduze phakathi kokuguqulwa kwemvamisa nokuguquguquka kwesigaba.
Uma kuqhathaniswa ne-amplitude modulation technology, inzuzo evelele kakhulu yokuguquguquka kwe-engeli ukusebenza kwayo okuphezulu kokulwa nomsindo. Nokho, kukhona izinzuzo nokulahlekelwa. Izindleko zokuthola le nzuzo ukuthi i-engeli modulation ithatha umkhawulokudonsa obanzi kunesiginali ye-amplitude modulation.
Okungenhla incazelo yamaphuzu olwazi mayelana nokuguquguquka okungaqondile (i-angle modulation) ilethe i-HDV photoelectric Technology Co., Ltd. I-Shenzhen HDV photoelectric Technology Co., Ltd. ingumkhiqizi wemikhiqizo yokuxhumana ngokuyinhloko. Njengamanje, imishini ekhiqizwayo ihlanganisaUchungechunge lwe-ONU, optical module uchungechunge, Uchungechunge lwe-OLT, futhiuchungechunge lwe-transceiver. Singahlinzeka ngezinsizakalo ezenziwe ngezifiso ezimweni ezahlukahlukene. Wamukelekilebonisana.
