TDR ichidimbu chenguva-domain Reflectometry.Iyo tekinoroji yekuyera kure inoongorora masaisai anoratidzwa uye inodzidza mamiriro echinhu chakayerwa panzvimbo yekudzora kure.Mukuwedzera, pane nguva domain reflectometry;Nguva-kunonoka relay;Transmit Data Register inonyanya kushandiswa muindasitiri yekukurukurirana mukutanga nhanho kuona nzvimbo yekuputsika yetambo yekutaurirana, saka inonziwo "cable detector".A time domain reflectometer chiridzwa chemagetsi chinoshandisa time domain reflectometer kuratidza uye kutsvaga kukanganisa mutambo dzesimbi (semuenzaniso, dzakamonyoroka kana coaxial tambo).Inogona zvakare kushandiswa kutsvaga discontinuities mumakongiri, akadhindwa edunhu mabhodhi, kana chero imwe nzira yemagetsi.
E5071c-tdr mushandisi interface inogona kugadzira mepu yemeso yakafananidzirwa pasina kushandisa yakawedzera kodhi jenareta;Kana iwe uchida mepu yeziso chaiyo-nguva, wedzera chiratidzo jenareta kuti upedze kuyerwa!Iyo E5071C ine basa iri
Mhedziso yedzidziso yekufambiswa kwechiratidzo
Mumakore achangopfuura, nekukurumidza kuvandudzwa kweiyo bit rate yedhijitari yekutaurirana zviyero, semuenzaniso, iyo iri nyore mutengi USB 3.1 bit rate yakatosvika 10Gbps;USB4 inowana 40Gbps;Kuvandudzwa kwebit rate kunoita kuti matambudziko asati amboonekwa mune yechinyakare dhijitari system atange kuoneka.Matambudziko akadai sekufungisisa uye kurasikirwa anogona kukonzera kukanganisa kwedhijitari, zvichikonzera zvikanganiso zvishoma;Uye zvakare, nekuda kwekudzikira kweiyo inogamuchirwa yenguva muganho kuti uve nechokwadi chekushanda chaiko kwechishandiso, kutsauka kwenguva munzira yechiratidzo kunova kwakakosha.Iyo radiation electromagnetic wave uye coupling inogadzirwa nekurasika capacitance inotungamira kune crosstalk uye kuita kuti mudziyo ushande zvisizvo.Sezvo masekete achiwedzera kudiki uye kusimba, izvi zvinova dambudziko rakawanda;Kuita kuti zvinhu zviwedzere kuipa, kuderedzwa kwemagetsi ekupa kuchaita kuti kuderedzwa kwechiratidzo-ku-ruzha chiyero, zvichiita kuti chigadziro chiwedzere kunetseka kune ruzha;
Iyo yakatwasuka kurongeka kweTDR ndiyo impedance
TDR inodyisa nhanho nhanho kubva kuchiteshi kuenda kudunhu, asi nei iyo yakatwasuka unit yeTDR isiri voltage asi impedance?Kana iri impedance, sei uchigona kuona kukwira?Ndezvipi zviyero zvinogadzirwa neTDR zvichibva paVector Network Analyzer (VNA)?
VNA chishandiso chekuyera frequency mhinduro yechikamu chakayerwa (DUT).Pakuyera, sinusoidal excitation siginecha inoiswa kune yakayerwa mudziyo, uye ipapo kuyerwa kwemhedzisiro inowanikwa nekuverenga vector amplitude reshiyo pakati peiyo yekuisa chiratidzo uye chiratidzo chekutumira (S21) kana chiratidzo chinoratidzwa (S11).Mafrequency ekupindura maitiro emudziyo anogona kuwanikwa nekutarisa chiratidzo chekuisa muyero ye frequency renji.Kushandisa bhendi pass sefa mukuyera inogamuchira kunogona kubvisa ruzha uye isingadikanwi chiratidzo kubva pakuyera mhedzisiro uye kunatsiridza kuyerwa kwechokwadi.
Schematic dhayagiramu yechiratidzo chekupinza, chiratidzo chinotaridza uye chiratidzo chekutumira
Mushure mekutarisa iyo data, IT yakawanikwa kuti chiridzwa cheTDR chakajairisa iyo voltage amplitude yeinoratidzwa wave, uye yobva yafanana nayo kune impedance.Iyo yekuratidzira coefficient ρ yakaenzana neinotaridza voltage yakakamurwa neiyo inopinza voltage;Reflection inoitika uko iyo impedance isingaendereki, uye voltage inoratidzwa kumashure inoenderana nemusiyano uripo pakati peiyo impedances, uye iyo yekupinda voltage inoenzanirana nehuwandu hweiyo impedances.Saka tine fomula inotevera.Sezvo chinobuda chiteshi cheTDR chiridzwa chiri makumi mashanu ohms, Z0=50 ohms, saka Z inogona kuverengerwa, kureva, iyo impedance curve yeTDR inowanikwa nechirongwa.
Naizvozvo, mumufananidzo uri pamusoro, iyo impedance inoonekwa padanho rekutanga rechiratidzo idiki kwazvo pane 50 ohms, uye kutsetseka kwakadzikama padivi pemupendero unokwira, zvichiratidza kuti iyo impedance inoonekwa inoenzanirana nedaro rakafambwa panguva yekuparadzira kumberi. yechiratidzo.Munguva iyi, impedance haina kuchinja.Ini ndinofunga zviri nani kutenderera kutaura kuti inoonekwa sekunge iyo inosimuka mupendero yakayamwa mushure mekuderedzwa kwe impedance, uye pakupedzisira yakadzikira.Munzira yakatevera yeimpedance yakaderera, yakatanga kuratidza maitiro ekukwira kwepamusoro uye yakaramba ichikwira.Uye ipapo iyo impedance inoenda pamusoro pe50 ohms, saka chiratidzo chinodarika zvishoma, uye zvishoma nezvishoma chinodzoka, uye pakupedzisira chinodzikama pa50 ohms, uye chiratidzo chasvika kune yakatarisana chiteshi.Kazhinji, nharaunda iyo iyo impedance inodonha inogona kufungidzirwa seine capacitive mutoro pasi.Iyo dunhu iro iyo impedance inowedzera kamwe kamwe inogona kufungidzirwa seine inductor munhevedzano.
Nguva yekutumira: Aug-16-2022
