Lapho sidlulisela isignali, kungakhathaliseki ukuthi isignali ye-optical, isignali kagesi, noma isignali engenazintambo, uma idluliswa 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 yokuguquguquka, kubizwa ngokuthi i-modulation yesigaba noma i-modulation yesigaba (PM) Kulezi zinhlobo ezimbili zezinqubo zokuguquguquka, i-amplitude yenkampani yenethiwekhi ihlala ingashintshi, 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 amasiginali we-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.
