Lapho sidlulisela isignali, kungakhathaliseki ukuthi isignali yokubona noma isignali kagesi noma isignali engenantambo, uma idluliswa ngokuqondile, isignali isengozini yokuphazamiseka komsindo, futhi kunzima ukuthola ulwazi olulungile ekugcineni kokwamukela. Ukuze kuthuthukiswe ikhono lokulwa nokuphazamiseka kohlelo, kungenziwa ngokushintshanisa isignali. Ukushintshashintshashintshashintshashintshashintshashintshayo nakho kungathuthukisa izinga lokusebenzisa isiteshi, ngakho ukuguquguquka kunomthelela omkhulu ekusebenzeni kahle nasekuthembekeni kwesistimu yezokuxhumana.
I-engeli echazwe ngezansi ingeyezimpawu ze-analog.
Isithwali se-Sinusoidal sinemingcele emithathu: i-amplitude, imvamisa kanye nesigaba. Singakwazi ukulayisha ulwazi lwesignali eshintshiwe hhayi kuphela ekushintsheni kwe-amplitude yesithwali, kodwa futhi ekushintsheni kwemvamisa noma kwesigaba somphathi. Ngesikhathi sokushintshwa, uma imvamisa yenkampani yenethiwekhi ishintsha ngesignali eshintshiwe, ibizwa ngokuthi i-frequency modulation noma i-frequency modulation (FM); Uma isigaba senkampani yenethiwekhi sishintsha ngesignali eshintshiwe, sibizwa ngokuthi i-modulation yesigaba noma i-modulation yesigaba (PM). Kulezi zinqubo ezimbili zokuguquguquka, i-amplitude yesithwali ihlala ingashintshi, kuyilapho ukuguqulwa kwemvamisa kanye nesigaba kubonakala njengoshintsho esigabeni esisheshayo senkampani yenethiwekhi, ngakho-ke ukuguqulwa kwemvamisa kanye nokuguqulwa kwesigaba kubizwa ngokuhlanganyela ngokuthi i-Angle modulation.
Umehluko phakathi kwe-Angle modulation kanye ne-amplitude modulation ukuthi i-spectrum yesiginali eshintshiwe ayisekho ukushintshwa okuqondile kwe-spectrum yesignali eshintshiwe yasekuqaleni, kodwa ukuguqulwa okungaqondile kwe-spectrum, okuzokhiqiza izingxenye ezintsha zefrikhwensi ezihlukile ku-spectrum shift, ngakho-ke okubizwa nangokuthi i-nonlinear modulation.
Kokubili i-FM ne-PM isetshenziswa kakhulu ezinhlelweni zokuxhumana. I-FM isetshenziswa kakhulu ekusakazweni komculo okuthembekile, ukudluliswa kwesignali yomsindo we-TV, ukuxhumana ngesathelayithi kanye nohlelo lwezingcingo zamaselula. Ngaphezu kokusetshenziswa ngokuqondile ekudluliseni, i-PM iphinde isetshenziswe ngokujwayelekile njengoshintsho ukukhiqiza amasiginali we-FM ngokungaqondile. Kunobudlelwane obuseduze phakathi kokuguqulwa kwemvamisa nokuguquguquka kwesigaba.
Uma kuqhathaniswa nokuguquguquka kwe-amplitude, inzuzo evelele kakhulu yokuguquguquka kwe-Angle ukusebenza kwayo okuphezulu kokulwa nomsindo. Kodwa-ke, kukhona ukuhwebelana phakathi kwezinzuzo nokulahlekelwa, futhi izindleko zale nzuzo ukuthi i-Angle modulation ithatha umkhawulokudonsa obanzi kunezimpawu ze-amplitude modulated.
Okungenhla yi-Shenzhen HDV Phoelectron Technology Co., Ltd. ukuze ulethe ulwazi "lwe-modulation nonlinear (i-Angle modulation)". I-Shenzhen HDV Phoelectron Technology Co., Ltd. isekelwe ikakhulukazi emikhiqizweni yokuxhumana yokukhiqiza abakhiqizi, ukukhiqizwa kwamanje kwempahla yembozo:I-ONUuchungechunge, uchungechunge lwamamojula optical,OLTuchungechunge, uchungechunge lwe-transceiver. Ingahlinzeka ngezinsizakalo ezenziwe ngezifiso ezimweni ezehlukene zezidingo zenethiwekhi, wamukelekile ukuthi uze uzobonisana.
