Rigol DS6104 Guide de l'administrateur

RIGOL TECHNOLOGIES USA INC

877-4-RIGOL-1 How-To Guide

[email protected]m

www.rigolna.com



Oscilloscope

SignalAnalysis

UsingFFTs

Application Notes

Comparison Guides

FAQs

How-To Guides

Programming Manuals

Quick Start Guides

Support Information

User’s Guides

RIGOL TECHNOLOGIES USA INC

877-4-RIGOL-1 How-To Guide

[email protected]

www.rigolna.com



FastFourierTransformswithRigolOscilloscopes



FFT(FastFourierTransform)isaprocesswhichconvertsatime‐domain

signalintoitsfrequencydomainequivalent.Commonapplicationsforusage

ofFFTwaveformsare:



zMeasuringharmoniccontentanddistortioninsystems

zCharacterizingnoiseinDCpowersupplies

zAnalyzingvibration



Howtoobtainawaveform'sFFT?



InthisexampleanFFTwillbegeneratedforthe1KHzsquare

waveacquiredonChannel1asseenbelow.Thissignalcanbe

duplicatedonanyRigolscopebyattachingtheprobetothesquare

wavegeneratorportonthefrontoftheinstrument.Onceyoudo

that,pushAUTOthenyouwillseethis:



RIGOL TECHNOLOGIES USA INC

877-4-RIGOL-1 How-To Guide

[email protected]

www.rigolna.com



Pressthe“MATH”button,amenuwillappearontheside,thenselectFFT

andsetthesourcetoChannel1:



AFastFourierTransformofthecurrentsignalonChannel1willappearinthe

Purplecolorbelowthesquarewave.



RIGOL TECHNOLOGIES USA INC

877-4-RIGOL-1 How-To Guide

[email protected]

www.rigolna.com



TheFFTcanbedisplayedfullscreenwiththechannelaswellbyadjusting

theWINDOWsetting.However,youliketoviewittakenoticeofthe

separateVERT/divandHORIZ/divsettingsshowninpurple.Youcanadjust

thesebypushingtheMATHbuttonandthenusingthehorizontaland

verticalscaleknobs.IftheFFTisn’tshownonthescreen,movetheVERTICAL

positionknobuntilyouseethezeropointandthenthesignal.



TherearetwooptionsforverticalunitsontheFFT:mVrmsand

dBVrms.Whenlookingtoviewsmallsignalsalongwithmuchlargersignals

dBVrmsisbeneficialbecauseitprovidesalogscale.Forthosenotusedto

logarithmicscalinglookatthescreenshotabove.Inthesplitscreenmode

shownthereare8verticaldivisionsdedicatedtotheFFT.Herearethevalues

atthetopofeachdivisiongiventhe200mVrms/divsettingandtheposition

ofthezeromarkerontheleftatthetopofthebottomdivision:



DivisionsdownfromtopofFFT

screen

Valueattopofthatdivision

0(topofpurpledisplay)1.4Vrms

11.2Vrms

21Vrms

3800mVrms

4600mVrms

5400mVrms

6200mVrms

70mVrms

8(verybottomofthescreen) ‐200(negativenumbersarenotused

byamVrmsscale)



So,inthismodetheFFThasabout1.4Vrmsoftotalrangecapability.Youcan

changethesensitivity,butifyouwantedtoseea10Vrmsfundamentalanda

10mVrmsharmonicatthesametimeitisn’tpossibleonalinearscale.

RIGOL TECHNOLOGIES USA INC

877-4-RIGOL-1 How-To Guide

[email protected]

www.rigolna.com



IfyouchangetheunitstodBVrms,herearethevalues:



Whenthesettingsare20dBVrms/divandthereferenceismovedtoone

divisiondownfromthetopoftheFFTdisplay:



Divisionsdownfromtop

ofFFTscreen

dBVrmsfromposition

marker

Valueattopofthat

division

0+10dBVrms 3.16Vrms

10dBVrms 1Vrms(attheposition

marker)

2‐10dBVrms .316Vrms

3‐20dBVrms .1Vrms

4‐30dBVrms .0316 Vrms

5‐40dBVrms .01 Vrms

6‐50dBVrms .00316mVrms

7‐60dBVrms .001mVrms

8‐70dBVrms .000316mVrms



Tounderstandthisfully,theformulatoderivethedBVrmsvalueisasfollows:

dBVrms=20*log(Vrms/VREF)



whereVREFinthiscaseis1Vrms,soitcanbesimplifiedto:



dBVrms=20*log(Vrms)



Consequently,whenlookingataspotonthescreenthatisknowntobeX

dBVrmstheactualVrmsvalueexpressedbysignalatthatlocationis:



Vrms=10^(X/20)

Forexample,‐20dBVrms=10^‐1=0.1Vrms

RIGOL TECHNOLOGIES USA INC

877-4-RIGOL-1 How-To Guide

[email protected]

www.rigolna.com



Sointhiscaseevery20dBisafactorof10xthevoltage.Usually,dBisused

intermsofWattsormilliWatts(dBm)inwhichcaseevery10dBisafactorof

10xthepower,butbecauseoftherelationshipbetweenpowerandvoltage

notethat20dBisafactorof10onyourscopesdisplay.



ThehorizontalunitsperdivisionoftheFFTarealwaysinfrequency.The

abovescreenshotshows1.25KHzperdivision.Inthisdisplay,theleftsideof

thescreenisalwaysatDCor0Hz.Eachdivisiontotherightthenmarksthe

setvalue.Inthiscasethedivisionswouldbe0Hz,1.25KHz,2.5KHz,3.75

KHz,5KHz,andsoon.



Howtosaveawaveform'sFFT?



TosaveanFFTtothescopeoraUSBdrive,theFFTmustbesavedasa

referencewave“REF”asinthefollowingprocedure:

Pressthe“REF”button.Whenthesidemenuappears,setthesourcetobe

theFFT.Thenusethe“Save”optioninthemenutosavelocallyorexternally.



RIGOL TECHNOLOGIES USA INC

877-4-RIGOL-1 How-To Guide

[email protected]

www.rigolna.com



Tosavethewaveform,selectsave.



TosavetheFFTwaveformtoaUSBdrivepressthe

“Location”buttontheLocationnowswitchesto

“External”asinthefigurebelow:



Uponselecting“Save”selectthefiletosavethewaveformtoandthenexit

uponcompletion.



Referencewaveformscanthenberecalledatalatertimetocomparesignals.

RIGOL TECHNOLOGIES USA INC

877-4-RIGOL-1 How-To Guide

[email protected]

www.rigolna.com



Insummary,whilenotasaccurateasaspectrumanalyzerorwithasmuch

range,theFFTfunctionoftheoscilloscopecanbeusedtoviewthe

frequencydomaininformationforasignal.Withavarietyofcapabilitiesto

changeranges,units,anddisplaymodeaswellassavingandrecalling

waveforms,Rigoloscilloscopescanmakefrequencymeasurementseasily

andquicklyusingtheincludedFFTfunction.



Formoreinformationorquestionscontactusdirectlyat:



RigolTechnologiesUSA

7401FirstPlace

SuiteN

OakwoodVillage,OH44146



Youcanreachusdirectlyat:

(440)232‐4488

877‐4‐RIGOL‐1

inf[email protected]om

www.rigolna.com(RigolNorthAmericawebsite)



Autres manuels pour DS6104

Autres manuels Rigol Instrument de mesure

Rigol

Rigol RP1003C Manuel utilisateur

Rigol

Rigol DSA800E Series Mode d'emploi

Rigol

Rigol DSA1000 Series Manuel d'installation et d'exploitation

Rigol

Rigol PCA1030 Manuel utilisateur

Rigol

Rigol DSA700 series Manuel utilisateur

Rigol

Rigol RSA Series Manuel utilisateur

Rigol

Rigol RSA3030 Manuel utilisateur

Rigol

Rigol RSA3015N Manuel utilisateur

Rigol

Rigol DS1000E Series, DS1000D Series Mode d'emploi

Rigol

Rigol DL3032 Manuel utilisateur

Rigol

Rigol DS6000 Series Instructions d'installation et d'utilisation

Rigol

Rigol DSA1030A series Manuel utilisateur

Rigol

Rigol DS Demo Manuel utilisateur

Rigol

Rigol RSA5000 Series Manuel utilisateur

Rigol

Rigol DSA1000 Series Mode d'emploi

Rigol

Rigol RSA5000 Series Manuel d'installation et d'exploitation

Rigol

Rigol RSA5065N-OCXO Manuel utilisateur

Rigol

Rigol RSA5065 Manuel utilisateur

Rigol

Rigol DP821A Manuel utilisateur

Rigol

Rigol DSA700 series Manuel utilisateur

Rigol

Rigol DSA1000A Series Manuel utilisateur

Rigol

Rigol DS1000U Series Manuel utilisateur

Rigol

Rigol RSA5065 Manuel utilisateur

Rigol

Rigol PHA2150 Manuel utilisateur

Manuels Instrument de mesure populaires d'autres marques

Suaoki

Suaoki D40 Manuel utilisateur

Elster

Elster BK-G1.6 Manuel utilisateur

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manuel

Duratool

Duratool D03128 Manuel utilisateur

Vega

Vega VEGAPULS 65 Manuel utilisateur

Tonghui

Tonghui TH2618B Manuel utilisateur

Tenmars

Tenmars TM-801 Manuel utilisateur

MSR

MSR 145 Manuel utilisateur

TPS

TPS WP-82 Manuel utilisateur

ELMETRON

ELMETRON CP-511 Manuel utilisateur

PCB Piezotronics

PCB Piezotronics 003C30 Manuel utilisateur

Tenma

Tenma 72-10465 Manuel utilisateur

Endress+Hauser

Endress+Hauser Proline Promag 50 Caractéristiques techniques

Siemens

Siemens SITRANS F Coriolis FCT030 Manuel de la liste des pièces

KLINGER

KLINGER CMF V Series Manuel utilisateur

EXFO

EXFO FTB-2 Manuel d'exploitation et d'entretien

Keysight

Keysight M8290A Manuel utilisateur

ADTEK

ADTEK MW-5 Manuel utilisateur