I-TDR sisishunqulelo se-time-domain Reflectometry.Ithekhinoloji yokulinganisa okude ehlalutya amaza abonakalisiweyo kwaye ifunda ubume bento elinganisiweyo kwindawo yokulawula kude.Ukongeza, kukho i-reflectometry ye-time domain;Ukuhanjiswa kwexesha lokulibaziseka;IRejista yeDatha yoThutho isetyenziswa ikakhulu kushishino lonxibelelwano kwibakala lokuqala ukubona indawo yokuqhawuka kwentambo yonxibelelwano, ngoko ikwabizwa ngokuba “yisixhobo sokubona intambo”.I-refleometer ye-time domain sisixhobo sombane esisebenzisa i-refleometer ye-time domain ukuze ibonise kwaye ifumane iimpazamo kwiintambo zetsimbi (umzekelo, i-twisted pair okanye i-coaxial cables).Isenokusetyenziswa kwakhona ukufumana ii-discontinuities kwizihlanganisi, iibhodi zesekethe eziprintiweyo, okanye nayiphi na enye indlela yombane.
I-E5071c-tdr ujongano lomsebenzisi lunokwenza imephu yamehlo efanisiweyo ngaphandle kokusebenzisa ikhowudi eyongezelelweyo yejenereyitha;Ukuba ufuna imephu yamehlo yexesha lokwenyani, yongeza umqondiso wejeneretha ukugqiba umlinganiselo!I-E5071C inalo msebenzi
Amagqabantshintshi ngethiyori yogqithiso lomqondiso
Kwiminyaka yakutshanje, ngokuphucuka ngokukhawuleza kwemilinganiselo yemigangatho yonxibelelwano lwedijithali, umzekelo, umthengi olula we-USB 3.1 umlinganiselo we-bit wade wafikelela kwi-10Gbps;I-USB4 ifumana i-40Gbps;Ukuphuculwa kwebit rate kwenza iingxaki ezingazange zibonwe kwinkqubo yedijithali yemveli ziqale ukuvela.Iingxaki ezinjengokucamngca kunye nokulahlekelwa kunokubangela ukuphazamiseka kwesignali yedijithali, okukhokelela kwiimpazamo ezincinci;Ukongeza, ngenxa yokuncipha komda wexesha elamkelekileyo ukuqinisekisa ukusebenza okuchanekileyo kwesixhobo, ukuphambuka kwexesha kwindlela yomqondiso kubaluleke kakhulu.Amaza ombane wombane kunye nokudityaniswa okuveliswe ngamandla alahlekileyo kuya kukhokelela kwi-crosstalk kwaye yenze isixhobo sisebenze ngokungalunganga.Njengoko iisekethe ziya zincinci kwaye ziqina, oku kuba yingxaki ngakumbi;Ukwenza izinto zibe zibi nakakhulu, ukunciphisa i-voltage yokubonelela kuya kubangela umlinganiselo ophantsi we-signal-to-noise, okwenza isixhobo sithinteke ngakumbi kwingxolo;
Ulungelelwaniso oluthe nkqo lwe-TDR yi-impedance
I-TDR ityisa inyathelo lamaza ukusuka kwizibuko ukuya kwisekethe, kodwa kutheni iyunithi ethe nkqo ye-TDR ingeyiyo i-voltage kodwa i-impedance?Ukuba i-impedance, kutheni ubona i-edge ekhulayo?Yiyiphi imilinganiselo eyenziwa yi-TDR esekelwe kwiVector Network Analyzer (VNA)?
I-VNA sisixhobo sokulinganisa ukuphendula rhoqo kwenxalenye elinganisiweyo (DUT).Xa ukulinganisa, isignali yokuvuselela i-sinusoidal igalelo kwisixhobo esilinganisiweyo, kwaye ke iziphumo zokulinganisa zifunyenwe ngokubala i-vector amplitude ratio phakathi kwe-input signal kunye ne-transmission signal (S21) okanye i-signal ebonakalisiweyo (S11).Iimpawu zokuphendula rhoqo kwisixhobo zinokufunyanwa ngokuskena isignali yegalelo kuluhlu lwamaza okulinganisa.Ukusebenzisa isihluzo sokupasa ibhendi kumlinganiselo owamkelayo kunokususa ingxolo kunye nomqondiso ongafunekiyo kwisiphumo sokulinganisa kunye nokuphucula ukuchaneka komlinganiselo.
Umzobo weSchematic wesignali yegalelo, umqondiso obonakalisiweyo kunye nesignali yokudlulisa
Emva kokujonga idatha, i-IT yafunyaniswa ukuba isixhobo se-TDR siqhelekile i-voltage amplitude yamaza abonakalisiweyo, kwaye emva koko yalingana ne-impedance.I-coefficient yokubonisa ρ ilingana nombane obonakalisiweyo owahlulwe yi-voltage yegalelo;Ukubonakaliswa kwenzeka apho i-impedance ingaqhubekiyo, kwaye i-voltage ebonakaliswe ngasemva ilingana nomahluko phakathi kwe-impedances, kwaye igalelo lombane lilingana nesimbuku se-impedances.Ke sinale fomula ilandelayo.Ekubeni i-port ephumayo yesixhobo se-TDR yi-50 ohms, i-Z0 = i-50 ohms, ngoko i-Z ingabalwa, oko kukuthi, i-curve ye-impedance ye-TDR efunyenwe ngesakhiwo.
Ke ngoko, kulo mzobo ungentla, uthintelo olubonwe kwinqanaba lokuqala lesehlo somqondiso lincinci kakhulu kune-50 ohms, kwaye ithambeka lizinzile ecaleni komphetho onyukayo, okubonisa ukuba ukuthintela okubonwayo kuhambelana nomgama ohanjiweyo ngexesha lokusasaza phambili. yomqondiso.Ngeli xesha, i-impedance ayitshintshi.Ndicinga ukuba kungqukuva ukutsho ukuba kuthathwa ngokungathi umphetho onyukayo wafunxwa emva kokuncitshiswa kwe-impedance, kwaye ekugqibeleni wehliswa.Kwindlela elandelayo ye-impedance ephantsi, yaqala ukubonisa iimpawu zomda wokunyuka kwaye waqhubeka nokunyuka.Kwaye ke i-impedance idlulela ngaphaya kwe-50 ohms, ngoko ke umqondiso udlula kancinci, emva koko ubuye kancinci, kwaye ekugqibeleni uzinzile kwi-50 ohms, kwaye umqondiso ufikelele kwelinye izibuko.Ngokubanzi, ummandla apho i-impedance yehla ingacingelwa njengomthwalo we-capacitive emhlabeni.Ummandla apho i-impedance inyuka ngequbuliso inokucingelwa ngokuba ne-inductor kuthotho.
Ixesha lokuposa: Aug-16-2022