Xa sihambisa umqondiso, nokuba ngumqondiso we-optical okanye umbane wombane okanye i-wireless signal, ukuba ihanjiswe ngokuthe ngqo, isibonakaliso sithinteka ekuphazamisekeni kwengxolo, kwaye kunzima ukufumana ulwazi oluchanekileyo ekupheleni kokufumana. Ukuze kuphuculwe ubuchule bokuchasana nokuphazamiseka kwenkqubo, inokuqondwa ngokumodareyitha umqondiso. Ukumodareyitha kunokuphucula izinga lokusetyenziswa kweshaneli, ngoko ke ukumodareyitha kunempembelelo enkulu ekusebenzeni kunye nokuthembeka kwenkqubo yonxibelelwano.
I-engile yokumodareyitha echazwe ngezantsi yeyeempawu ze-analog.
I-Sinusoidal carrier ineeparamitha ezintathu: i-amplitude, i-frequency kunye nesigaba. Singakwazi ukulayisha ulwazi lwesignali elungisiweyo kungekuphela nje kwinguqu ye-amplitude ye-carrier, kodwa nakwi-frequency okanye utshintsho lwesigaba somthwali. Ngexesha lokumodareyitha, ukuba i-frequency ye-carrier carrier iyatshintsha kunye ne-signal modulated, ibizwa ngokuba yi-frequency modulation okanye i-frequency modulation (FM); Ukuba isigaba somthwali sitshintsha kunye nesignali edibeneyo, ibizwa ngokuba yi-modulation yesigaba okanye i-modulation phase (PM). Kwezi nkqubo zimbini zokumodareyitha, i-amplitude yomthwali ihlala ihleli, ngelixa utshintsho kwi-frequency kunye nesigaba sibonakaliswa njengotshintsho kwisigaba esikhawulezileyo somthwali, ngoko ke ukumodareyitha kwamaxesha kunye nokumodareyitha kwesigaba kubizwa ngokuba yi-Angle modulation.
Umahluko phakathi kwe-Angle modulation kunye ne-amplitude modulation kukuba i-spectrum yesignali emodareyithiweyo ayiseyiyo i-linear shift of the original modulated signal spectrum, kodwa inguqu engahambelaniyo ye-spectrum, eya kuvelisa amacandelo amatsha amaza ahlukeneyo ukusuka kwi-spectrum shift, ngoko kunjalo. ikwabizwa ngokuba yi-nonlinear modulation.
Bobabini i-FM kunye ne-PM zisetyenziswa ngokubanzi kwiinkqubo zonxibelelwano. I-FM isetyenziswa kakhulu kusasazo lomculo oluthembekileyo, ukuhanjiswa kwesandi seTV, unxibelelwano ngesathelayithi kunye nenkqubo yeselula. Ukongeza ekusetyenzisweni ngokuthe ngqo ukusasaza, i-PM ikwasetyenziswa ngokuqhelekileyo njengenguqu yokuvelisa ngokungangqalanga imiqondiso ye-FM. Kukho ubudlelwane obusondeleyo phakathi kokumodareyitha rhoqo kunye nokuguqulwa kwesigaba.
Xa kuthelekiswa nokumodareyitha kwe-amplitude, olona ncedo lubalaseleyo lwe-Angle modulation kukusebenza kwayo okuphezulu kokuchasana nengxolo. Nangona kunjalo, kukho urhwebo phakathi kweenzuzo kunye nelahleko, kwaye iindleko zolu ncedo kukuba i-Angle modulation ithatha i-bandwidth ebanzi kune-amplitude modulated signals.
Oku kungasentla yi-Shenzhen HDV Phoelectron Technology Co., Ltd. ukuba uzise "umodareyitha ongekho mgca (umodareyitha we-Angle)" ulwazi. I-Shenzhen HDV Phoelectron Technology Co., Ltd. isekwe ikakhulu kwiimveliso zonxibelelwano zokuvelisa abavelisi, imveliso yangoku yezixhobo zokugubungela:I-ONUuthotho, uthotho lweemodyuli zokukhanya,OLTseries, transceiver series. Inokubonelela ngeenkonzo ezilungiselelwe iimeko ezahlukeneyo zeemfuno zenethiwekhi, wamkelekile ukuza kudibana.
