izindaba

Nakuba umfundi ngamunye efunda amabhakhodi ngezindlela ezihlukene, umphumela wokugcina uwukuguqula ulwazi lube amasignali edijithali bese lube idatha engafundwa noma ehambisana namakhompyutha. Isofthiwe yokukhipha amakhodi kudivayisi ehlukile iyaqedwa, ibhakhodi ibonwa futhi ihlukaniswe yi-decoder, bese ilayishwa kukhompuyutha yokusingatha.

Ukulayisha idatha kudinga ukuxhunywa noma kuxhunywe kumsingathi, futhi isixhumi esibonakalayo ngasinye kufanele sibe nezendlalelo ezimbili ezihlukene: eyodwa isendlalelo esibonakalayo (izingxenyekazi zekhompuyutha), kanti enye isendlalelo esinengqondo, esibhekisela kumthethonqubo wokuxhumana. Izindlela zokusebenzelana ezivamile yilezi: imbobo yekhibhodi, imbobo ye-serial noma uxhumano oluqondile. Uma usebenzisa indlela yokusebenzelana kwekhibhodi, idatha yezimpawu zebhakhodi ethunyelwe ngumfundi ibhekwa yi-PC noma i-terminal njengedatha ethunyelwe yikhibhodi yayo, futhi ngesikhathi esifanayo, amakhibhodi abo angakwazi ukwenza yonke imisebenzi. Uma ukusebenzisa imbobo yekhibhodi kuhamba kancane kakhulu, noma ezinye izindlela zokusebenzelana azitholakali, sizosebenzisa indlela yokuxhumana yembobo yochungechunge. Kunezincazelo ezimbili zokuxhumana okuqondile lapha. Enye isho ukuthi umfundi ukhipha idatha ngokuqondile kumsingathi ngaphandle kwempahla eyengeziwe yokukhipha amakhodi, kanti enye isho ukuthi idatha ekhihliwe ixhunywe ngokuqondile kumsingathi ngaphandle kokusebenzisa ikhibhodi. Amanye amagama asetshenziswa kakhulu I-Dual Interface: Kusho ukuthi umfundi angaxhuma ngokuqondile amathuluzi amabili ahlukene, futhi alungiselele futhi axhumane netheminali ngayinye, isibonelo: i-CCD isetshenziselwa ukuxhuma itheminali ye-IBM ye-POS emini, nasebusuku. Izoxhuma kutheminali yedatha ephathekayo yokusungula izinto ezithengiswayo, futhi isebenzise amandla okusebenzelana okwakhelwe ngaphakathi okukabili ukwenza ukushintsha phakathi kwamadivayisi womabili kube lula kakhulu. Imemori ye-Flash (Inkumbulo ye-Flash): Imemori ye-Flash iyi-chip engagcina idatha ngaphandle kokunikezwa kwamandla, futhi ingaqedela ukubhalwa kabusha kwedatha ngokuphazima kweso. Iningi lemikhiqizo ka-Welch Allyn isebenzisa inkumbulo ekhanyayo ukuze imiselele ama-PROM asekuqaleni, okwenza umkhiqizo uthuthuke kakhudlwana. I-HHLC (Ivumelana Ne-Laser Ephethwe Ngesandla): Amanye amatheminali angenayo impahla yokuqopha angasebenzisa kuphela idikhoda yangaphandle ukuxhumana. Iphrothokholi yale ndlela yokuxhumana, evame ukwaziwa ngokuthi ukulingisa kwe-laser, isetshenziselwa ukuxhuma i-CCD noma isifundi se-laser kanye nangaphandle Setha isiqophi. I-RS-232 (Izinga elingu-232 Elinconyiwe): Izinga le-TIA/EIA lokudluliswa kwe-serial phakathi kwamakhompyutha nama-peripheral afana nezifundi zebhakhodi, iModemu, namagundane. I-RS-232 ivamise ukusebenzisa ipulaki enamaphini angu-25 i-DB-25 noma ipulaki engu-9-pin DB- 9. Ibanga lokuxhumana le-RS-232 ngokuvamile lingaphakathi kuka-15.24m. Uma kusetshenziswa ikhebula elingcono, ibanga lokuxhumana lingandiswa.