Pamene titumiza chizindikiro, kaya ndi chizindikiro cha kuwala, chizindikiro cha magetsi, kapena chizindikiro chopanda zingwe, ngati chikuperekedwa mwachindunji, chizindikirocho chimasokonezeka mosavuta ndi phokoso, ndipo n'zovuta kupeza chidziwitso cholondola pamapeto olandira. Pofuna kupititsa patsogolo mphamvu zotsutsana ndi kusokoneza dongosolo, zikhoza kuzindikirika mwa kusintha chizindikiro. Kusinthasintha kungathenso kugwiritsa ntchito bwino ma tchanelo, motero kumakhudza kwambiri momwe njira zoyankhulirana zimagwirira ntchito bwino komanso modalirika.
Kusinthasintha kwa ngodya komwe kufotokozedwa pansipa ndi kwa ma analogi.
Wonyamula sinusoidal ali ndi magawo atatu:matalikidwe, pafupipafupi, ndi gawo. Tikhoza kunyamula zambiri za chizindikiro modulated osati mu matalikidwe kusintha chonyamulira komanso pafupipafupi kapena gawo kusintha chonyamulira. Panthawi yosinthika, ngati mafupipafupi a chonyamulira amasiyana ndi chizindikiro chosinthira, amatchedwa kusinthasintha kwafupipafupi kapena kusinthasintha kwafupipafupi (FM); ngati gawo la chonyamulira limasiyanasiyana ndi siginecha yosinthira, imatchedwa kusinthasintha kwa gawo kapena kusinthasintha kwa gawo (PM) Mumitundu iwiri iyi yamayendedwe osinthika, matalikidwe a chonyamulira amakhalabe osasintha, ndipo kusintha kwa ma frequency ndi gawo kumawonetsedwa ngati kusintha kwa nthawi yomweyo gawo la chonyamulira. Chifukwa chake, kusinthasintha kwa FM ndi gawo limodzi kumatchedwa kusinthasintha kwa ngodya.
Kusiyana kwakepakati pa ngodya ndi matalikidwe kusinthasintha ndi kuti modulated sipekitiramu sipekitiramu salinso liniya kusintha sipekitiramu choyambirira modulated sipekitiramu, koma nonlinear kusintha sipekitiramu sipekitiramu, amene adzatulutsa zigawo zatsopano pafupipafupi osiyana ndi sipekitiramu kusintha, choncho amatchedwanso. kusasintha kwa mzere.
FM ndi PMamagwiritsidwa ntchito kwambiri m'njira zoyankhulirana. Ma FM amagwiritsidwa ntchito kwambiri pakuwulutsa nyimbo zodalirika kwambiri, kutumiza ma audio pa TV, kuyankhulana pa satellite, ndi ma foni am'manja. Kuphatikiza pa kugwiritsidwa ntchito mwachindunji pakufalitsa, PM imagwiritsidwanso ntchito ngati njira yosinthira mwachindunji ma siginecha a FM. Pali mgwirizano wapakati pakati pa kusinthasintha kwafupipafupi ndi kusintha kwa gawo.
Poyerekeza ndi ukadaulo wa amplitude modulation, mwayi wodziwika kwambiri wa kusinthasintha kwa ngodya ndikuchita kwake kwakukulu kotsutsa phokoso. Komabe, pali zopindula ndi zotayika. Mtengo wopezera mwayi uwu ndikuti kusinthika kwa ngodya kumakhala ndi bandwidth yotakata kuposa siginecha yosinthira matalikidwe.
Pamwambapa ndi kufotokozera mfundo za chidziwitso za kusinthasintha kosasinthasintha (kusinthasintha kwa angle) kumabweretsa HDV photoelectric Technology Co., Ltd. Shenzhen HDV photoelectric Technology Co., Ltd. Pakadali pano, zida zomwe zimapangidwa zimakwiriraZithunzi za ONU, Optical module mndandanda, Zithunzi za OLT,nditransceiver mndandanda. Titha kupereka ntchito makonda pazochitika zosiyanasiyana. Mwalandiridwafunsani.
