Ukuhumusha okujulile kwe-jitter
Uma izinga ledatha lesistimu linyuswa, i-jitter amplitude elinganiswa ngemizuzwana embalwa izohlala icishe ifane, kodwa uma ikalwa ngengxenye yesikhathi sebhithi, izokhuphuka ngokulingana nesilinganiso sedatha, okuholela ku-bit. amaphutha. Ngakho-ke, i-jitter ehlobene kufanele yehliswe ngangokunokwenzeka ohlelweni ukuze kuthuthukiswe ukusebenza kwesistimu iyonke.
I-Jitter ichaza ukuguquguquka okuvundlile kwesignali, okungukuthi, ukuchezuka kwesikhashana kwesignali endaweni yayo ekahle ngesikhathi esithile.
1. Ukuhunyushwa kwamaphuzu okuphambanamgwaqo
Isilinganiso se-crossover yesignali evamile yi-50%, okusho ukuthi isignali "1" kanye "0" i-akhawunti ngayinye ngesigamu sezinga. Ukuze ulinganise isilinganiso sokuhlobana, sebenzisa indlela yezibalo eboniswe emfanekisweni. Izinga lesiphambano liyisilinganiso esibalwe ngokwefasitela elimaphakathi lezibalo zephoyinti eliphambene, futhi isibalo sengxenye yalo simi kanje (lapho izinga elingu-1 kanye no-0 kuyinani elimaphakathi lika-20% phakathi kwemephu yeso, okungukuthi, ukuguqulwa kusuka ku-40% kuya ku-60%
2.Umphumela
Ikhono lesiginali 1 noma 0 ukudlulisa isisindo liyahlukahluka ngenani lamaphoyinti okuwela. Njengoba kuboniswe emfanekisweni, isibalo esingakwesokunxele siyimephu yamehlo enobudlelwane obuhlukene obuhlukene, obuhambisana nezimpawu ezifanele ze-pulse 1 kanye no-0 kwesokudla. Ngesikhathi esifanayo, singakwazi futhi ukuqonda ubudlelwano phakathi kobubanzi besikhathi esihlukile sesignali ye-pulse kanye nengxenye ephambene yegrafu.
3.Fingqa
Kumasiginali ajwayelekile, isilinganiso samaleveli esiginali esabalalisiwe 1 kanye no-0 yiwona avame kakhulu. Ngokuvamile kudingekile ukuthi isilinganiso sesiphambano sesithombe seso sibe ngu-50%, okungukuthi, ubude be-pulse yesiginali efanayo 1 kanye no-0 busetshenziswe njengezinga lokuqinisekisa amapharamitha afanelekile. Ngakho-ke, ukuhlaziywa kokulahlekelwa kwe-amplitude okuhlobene okubangelwa ukuchezuka kwamazinga esignali ahlukene we-1 kanye ne-0 kungalinganiswa ngokuphumelelayo ngokuya ngokusatshalaliswa kobudlelwane be-eye cross ratio. Isibonelo, uma isilinganiso sokuphambana kweso sikhulu kakhulu, okungukuthi, amasiginali amaningi we-1 adluliswayo, iphutha lesiginali, ukuvikela kanye nemikhawulo yalo kuzoqinisekiswa ngokuya ngalobu budlelwano be-cross ratio. Isilinganiso sesiphambano samehlo sincane kakhulu, okungukuthi, ukudluliswa kwamasignali amaningi kakhulu angu-0, ngokuvamile kulula ukubangela isignali yomamukeli akulula ukukhipha imvamisa kuyo, okuholela ekuhlulekeni kokuvumelanisa, okuholela ekulahlekeni kokuvumelanisa. Ilingana negagasi eliyisikwele, okuholela ekungafanini kwefrikhwensi, futhi ngaphansi kuka-50% wengxenye yesikwele samagagasi.
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