Ka Admin / 05 Nov 24 /0Maikutlo Kamohelo e nepahetseng ea matshwao a dijithale Lenaneong la puisano la dijithale, seo moamoheli a se fumanang ke kakaretso ea lets'oao le fetisoang le lerata la kanale. Kamohelo e nepahetseng ea matshwao a dijithale e theilwe hodima kgonahalo e fokolang ya phoso e le mokgwa o "molemo ka ho fetisisa". Liphoso tse shebiloeng khaolong ena ke mai... Bala haholoanyane Ka Admin / 04 Nov 24 /0Maikutlo Sebopeho sa sistimi ea phetisetso ea lets'oao la baseband ea dijithale Setšoantšo sa 6-6 ke setšoantšo sa li-block tsa mokhoa o tloaelehileng oa phetisetso ea signal baseband. Haholo-holo e entsoe ka sefahla se romellang (jenereithara ea lets'oao la seteishene), mocha, ho amohela filthara le qeto ea sampole. E le ho etsa bonnete ba mosebetsi o tšepahalang le o hlophisehileng oa sistimi, ... Bala haholoanyane Ka Admin / 20 Sep 24 /0Maikutlo Karohano ea makhetlo a mangata Ha matla a phetisetso ea mocha oa 'mele o phahame ho feta tlhoko ea pontšo e le' ngoe, mocha o ka arolelanoa ka lipontšo tse ngata, mohlala, mohala oa trunk oa tsamaiso ea thelefono hangata o na le matšoao a likete a fetisitsoeng ka fiber e le 'ngoe. Multiplexing ke theknoloji ea ho rarolla mathata a ... Bala haholoanyane Ka Admin / 19 Sep 24 /0Maikutlo Mofuta o tloaelehileng oa khoutu ea phetiso ea baseband (1) Khoutu ea AMI AMI(Alternative Mark Inversion) khoutu ke lebitso le felletseng la khoutu e fetoletsoeng ea letšoao, molao oa eona oa khouto ke ho fetola khoutu ea molaetsa “1″ (tšoao) ho “+1″ le “-1″, athe "0" (letšoao le se nang letho) le lula le sa fetohe. Ka mohlala... Bala haholoanyane Ka Admin / 12 Sep 24 /0Maikutlo Nonlinear modulation (Angle modulation) Ha re fetisa letšoao, ebang ke lets'oao la optical kapa lets'oao la motlakase kapa lets'oao le se nang mohala, haeba le fetisoa ka kotloloho, lets'oao le ka ba le tšitiso ea lerata, 'me ho thata ho fumana tlhahisoleseling e nepahetseng qetellong ea ho amohela. E le hore t... Bala haholoanyane Ka Admin / 11 Sep 24 /0Maikutlo Binary Digital modulation Litsela tsa motheo tsa binary digital modulation ke: binary amplitude keying (2ASK) - phetoho ea amplitude ea letšoao la mochine; Binary frequency shift keying (2FSK) - phetoho ea khafetsa ea lets'oao la sephethephethe; Binary phase shift keying (2PSK)- Phetoho ea mokhahlelo oa mopalami ke... Bala haholoanyane 123456E latelang >>> Leqephe 1 / 77