Dab tsi yog tsib feem ntau qhov chaw ntawm cov zis ripple nyob rau hauv ib qho kev hloov fais fab mov?
Hloov fais fab mov tso zis ripple feem ntau los ntawm tsib qhov chaw: input low-frequency ripple; high-frequency ripple; parasitic tsis tshwm sim los ntawm hom hom ripple suab nrov; lub zog ntaus ntawv hloov cov txheej txheem tsim los ntawm lub suab nrov ultra-siab resonance; kaw-loop tswj thiab tswj los ntawm lub suab nrov ripple.
Ripple yog AC cuam tshuam cov teeb liab superimposed ntawm DC teeb liab, uas yog ib qho tseem ceeb heev hauv kev ntsuam xyuas fais fab mov. Tshwj xeeb tshaj yog rau cov khoom siv hluav taws xob tshwj xeeb, xws li laser fais fab mov, ripple yog ib qho tseem ceeb ntawm kev tuag. Yog li ntawd, kev ntsuam xyuas ntawm lub zog mov ripple yog qhov tseem ceeb heev.
Fais fab mov ripple ntsuas txoj kev yog dav muab faib ua ob hom: ib tug yog lub voltage teeb liab ntsuas txoj kev; lwm qhov yog txoj kev ntsuas teeb liab tam sim no.
Feem ntau rau qhov tsis tu ncua voltage los yog ripple kev ua tau zoo ntawm qhov tam sim no qhov chaw, tuaj yeem siv qhov ntsuas qhov ntsuas hluav taws xob. Rau siab ripple kev ua tau zoo yuav tsum tau ntawm qhov tam sim no qhov chaw yog qhov zoo tshaj plaws los siv txoj kev ntsuas teeb liab tam sim no.
Voltage teeb liab ntsuas ntawm ripple txhais tau hais tias ib qho oscilloscope yog siv los ntsuas AC ripple voltage teeb liab superimposed ntawm DC voltage teeb liab. Rau qhov chaw qhov hluav taws xob tas li, qhov kev ntsuam xyuas tuaj yeem ncaj qha nrog lub ntsuas hluav taws xob los ntsuas qhov hluav taws xob tso zis hluav taws xob rau lub nra. Rau qhov tsis tu ncua tam sim no, qhov kev ntsuam xyuas feem ntau yog los ntawm kev siv qhov ntsuas hluav taws xob, ntsuas qhov hluav taws xob waveform ntawm qhov kawg ntawm qhov ntsuas qhov ntsuas. Thoob plaws hauv cov txheej txheem xeem, qhov chaw oscilloscope yog tus yuam sij rau kev ua piv txwv cov teeb liab tiag tiag.
Cov kev teeb tsa hauv qab no yuav tsum tau ua ua ntej ntsuas.
1. Kev teeb tsa Channel:
Coupling: uas yog, kev xaiv ntawm channel coupling txoj kev. Ripple yog lub teeb liab AC superimposed ntawm lub teeb liab DC, yog li peb xav sim cov teeb liab ripple tuaj yeem tshem tawm DC teeb liab, thiab ncaj qha ntsuas lub superimposed AC teeb liab yog qhov zoo.
Wideband txwv: Tawm
Kev sojntsuam: ua ntej xaiv txoj kev ntsuas hluav taws xob. Tom qab ntawd xaiv qhov attenuation ratio ntawm qhov kev sojntsuam. Yuav tsum ua raws li qhov tseeb qhov sib piv ntawm qhov kev sojntsuam siv, kom tus lej nyeem los ntawm oscilloscope yog cov ntaub ntawv tiag. Piv txwv li, qhov ntsuas hluav taws xob siv tau muab tso rau hauv × 10 iav, tom qab ntawd lub sijhawm no, cov kev xaiv rau kev sojntsuam ntawm no kuj yuav tsum tau teem rau × 10 iav.
2. Tig teeb tsa:
Hom: ntug
Tau qhov twg los: qhov tseeb channel xaiv, xws li, npaj siv CH1 channel rau kev sim, ces ntawm no yuav tsum tau xaiv raws li CH1.
Txoj kab nqes: nce.
Trigger hom: Yog tias lub teeb liab ripple tau pom nyob rau lub sijhawm, xaiv 'Auto' txhais. Lub oscilloscope yuav cia li ua raws li qhov tseeb ntsuas lub teeb liab thiab tso saib nws. Lub sijhawm no, koj tuaj yeem teeb tsa lub khawm ntsuas kom pom tus nqi ntawm qhov koj xav tau ntsuas hauv lub sijhawm. Txawm li cas los xij, yog tias koj xav ntes cov teeb liab waveform thaum lub sijhawm ntsuas tshwj xeeb, koj yuav tsum tau teeb tsa txoj kev ua rau 'ib txwm' txhais. Hauv qhov no, koj kuj yuav tsum tau teeb tsa qhov loj ntawm qhov ntsuas qib. Feem ntau thaum koj paub tus nqi siab tshaj ntawm lub teeb liab uas koj ntsuas, teeb tsa qhov ntsuas ntawm 1/3 ntawm tus nqi ncov ntawm lub teeb liab ntsuas. Yog tias koj tsis paub, qhov ntsuas qib tuaj yeem teeb tsa me me.
Coupling: DC los yog AC ..., feem ntau siv AC coupling.
3. Sampling ntev (sec/g):
Qhov teeb tsa ntawm qhov ntsuas qhov ntev txiav txim siab seb cov ntaub ntawv xav tau tuaj yeem ua piv txwv. Thaum lub sijhawm ntsuas qhov ntev yog qhov loj heev, nws yuav nco cov khoom siv ntau zaus ntawm lub teeb liab tiag tiag; thaum lub teeb sampling ntev me me dhau lawm, koj tsuas tuaj yeem pom qhov tseeb teeb liab ntsuas hauv zos, tib yam tsis tuaj yeem tau txais cov teeb liab tiag tiag. Yog li ntawd, nyob rau hauv qhov tseeb ntsuas, koj yuav tsum tau tig lub khawm rov qab, ua tib zoo soj ntsuam, kom txog rau thaum lub tso tawm waveform yog ib tug tiag tiag waveform.
4. Qauv qauv:
Muaj peev xwm teem tau raws li qhov xav tau tiag tiag. Piv txwv li, yog tias koj xav ntsuas tus nqi PP ntawm lub ripple, nws yog qhov zoo dua los xaiv txoj kev ntsuas siab tshaj plaws. Lub sij hawm ua piv txwv kuj tuaj yeem teem caij raws li qhov xav tau tiag tiag, uas muaj feem xyuam rau qhov ntsuas zaus thiab qhov ntsuas qhov ntev.
5. Kev ntsuas:
Los ntawm kev xaiv lub ncov ntsuas ntawm cov channel sib raug, oscilloscope tuaj yeem pab koj tso cov ntaub ntawv xav tau hauv lub sijhawm. Koj tuaj yeem xaiv qhov zaus, tus nqi siab tshaj plaws thiab lub hauv paus txhais tau tias square tus nqi ntawm cov channel sib xws.
Los ntawm kev teeb tsa tsim nyog thiab cov qauv ua haujlwm ntawm oscilloscope, koj tuaj yeem tau txais cov teeb liab ripple xav tau. Txawm li cas los xij, thaum lub sijhawm ntsuas kev ntsuas, koj yuav tsum tau ua tib zoo saib xyuas kom tsis txhob muaj lwm yam teeb meem los ntawm kev cuam tshuam nrog oscilloscope sojntsuam nws tus kheej, kom tsis txhob ntsuas cov teeb liab tsis txaus.
