Abasebenzisi abaninzi ngakumbi baqalise ukusebenzisa umqondiso wedijithaliumnxeba, kodwa kwezinye iindawo ezingaphuhliswanga kakuhle i-analog ifowuni yomqondiso isasetyenziswa ngokuqhelekileyo. Abasebenzisi abaninzi babhidanisa imiqondiso ye-analog kunye neempawu zedijithali. Ngoko yintoni i-analog ifowuni? Yintoni ifowuni yedijithali yomqondiso?
Ifowuni ye-analog - Ifowuni ehambisa isandi ngemiqondiso ye-analog. Isignali ye-analog yombane ibhekiselele kwi-amplitude kunye nomqondiso ohambelanayo wombane oqhubekayo, lo mqondiso unokuba yisekethe ye-analog kwimisebenzi eyahlukeneyo, ukunyuka, ukongeza, ukuphindaphinda njalo njalo. Iimpawu ze-analog zikhona kuyo yonke indawo kwindalo, njengokutshintsha kobushushu bemihla ngemihla.
Isiginali yedijithali yimbonakaliso yedijithali yesignali yexesha (emelwe ngokulandelelana kwe-1 kunye ne-0), ngokuqhelekileyo ifunyenwe kwi-analog signal.
Izinto eziluncedo kunye nokungalunganga kweempawu zedijithali:
1, thatha ibhendi ebanzi. Ngenxa yokuba umgca uhambisa isignali ye-pulse, ukuhanjiswa kwedijithaliulwazi lwelizwiidinga i-akhawunti ye-20K-64kHz bandwidth, kunye ne-analog voice path kuphela i-4kHz bandwidth, oko kukuthi, i-akhawunti yesignali ye-PCM kwiindlela ezininzi zezwi le-analog. Kwishaneli ethile, izinga lokusetyenziswa kwayo liyancitshiswa, okanye iimfuno zalo zomgca zandisiwe.
I-2, iimfuno zobuchwepheshe zinzima, ngakumbi iteknoloji yokuvumelanisa ifuna ukuchaneka okuphezulu. Ukuqonda ngokuchanekileyo intsingiselo yomthumeli, umamkeli kufuneka ahlule ngokuchanekileyo into nganye yekhowudi, kwaye afumane isiqalo seqela ngalinye lolwazi, efuna umthumeli kunye nomamkeli ukuba baqonde ngokungqongqo ungqamaniso, ukuba ukwakheka kwenethiwekhi yedijithali, ingxaki yongqamaniso kube nzima ngakumbi ukusombulula.
I-3, ukuguqulwa kwe-analog / yedijithali kuya kuzisa impazamo ye-quantization. Ngokusetyenziswa kweesekethe ezinkulu ezidibeneyo kunye nokuthandwa kweendaba zokusasazwa kwe-broadband njenge-fiber optical, izibonakaliso ezininzi zedijithali zisetyenziselwa ukugcinwa kolwazi kunye nokuhanjiswa, ngoko ke iimpawu ze-analog kufuneka ziguqulelwe kwi-analog / digital, kwaye iimpazamo ze-quantization ngokuqinisekileyo ziya kudlula. kwenzeke kuguqulo.
Ixesha lokuposa: Feb-05-2024
