XITRON XT2640 - Screens; Viewing Periodic Waveforms - the CYCLE VIEW Screen; The Scope S Creens

XT2640OperatingManual 13July2016 Page61of187

12.10 USINGTHEXT2640ASANOSCILLOSCOPE–THESCOPESCREENS
TheSCOPEScreencanbeselectedforviewfromanyoftheMainDataScreensbypressingtheSCOPEbutton.Thereareactuallytwo
totallyindependentSCOPEscreensprovidingtheabilitytousetheXT2640asanoscilloscope–
CYCLEVIEW–
Alwaysshowsasinglefundamentalcycleofthewaveforms.
Requiresnospecificconfiguration.
Timeresolutionofthegreaterof2.6nsor1/512
th
ofacycle.
Youcanviewthevolts,ampsand/orwattssignalsforanychanneland/orinter‐phasevoltagesignals.
Youcanviewthesamesignalinmultipletraces,eachwithdifferentverticalscalingandoffsets.
Youcanauto‐scalethetracestoensuretheyfitonthechart.
Allowsupto6tracestobesimultaneouslyviewed.
Perfectfortheinspectionofperiodicwaveformswithextremeamplitudeandtimedetailavailable.
SCOPEVIEW–
Amulti‐channeldigitaloscilloscopewithmanyenhancements.
Upto12channels(volts,ampsand/orwattssignalsineachchannel)and/orinter‐phasevoltagesignals,uptosixviewable
atatime.
Youcanchangetracesand/ortracescalingwithouthavingtoretrigger.
Alldatacapturedwithfull22/24bitresolutionsoyoucanchangetracesand/ortracescalingwithouthavingtoretrigger.
Youcanauto‐scalethetracestoensuretheyfitonthechart.
Youcanshowthesamesignalinmultipletraces,eachwithdifferentverticalscalingandoffsets.
Userconfigurabletriggerandtimebase.
Cursorwithtimebasezoomcapability.
CanautomaticallyremoveanyconfiguredHFfilteringandselecttheHIcurrentrangeduringthescopecaptureandthen
replacetheoriginalsettingsaftercompletionofthecapture,perfectforcurrentinrushmeasurements.
Continuousorsingletrigger.
Perfectforcapturingnon‐periodicwaveformsandtransients(suchasinrushcurrentforexample).
WhichscreenisviewedisselectedbytheupperleftbuttonoftheSCOPEscreen.Thepresentlyselectedscreenviewnameis
displayedinthebutton,whichtoggleseverytimeitispressed.
Note:
YoudonothavetobeviewingaSCOPEscreenforsignalstobecaptured.
12.10.1 VIEWINGPERIODICWAVEFORMS – THECYCLE VIEWSCREEN

Theaboveexampleshowsa200kHzsinewavevoltage(inblue)andanalmostin‐phasetrianglewavecurrent(inred)andincludesa
thirdtrace(ingreen)whichisalsoofthecurrentwaveform,butscaledandoffsetforcloseinspectionofthepeakofthetriangle
wave.Notethatthischartprovides<10nstimeresolution(thereare512pixelsacrossthechart)andalsonotehowtheuseof
verticalscalingandoffsetcanbeusedtoshowveryfineamplitudedetails.ThisisanactualscreenimageobtainedfromaXT2640
measuringactualsignals,ithasnotbeenalteredexcepttoscaleittofitonthispage.ThiswasobtainedusingaWtypechannelcard
whichnominallysamplesatjustunder1MSPSsothisimageshowstheimpactoftheadvancedsamplingmethodprovidedbythe
XT2640andalsodemonstrateshowinaccurateitistostatethatthesamplingrateaffectsthebandwidth.
IfnofundamentalharmonicisavailablethenthechartisblankandNOFUNDAMENTALisdisplayedinthechart.Cycleviewplaces
everysampleinameasurementperiodatthecorrectphaseinthedisplayedcharttobuildasinglecycleformedfromallcycles
presentduringthemeasurementperiod.Todothisitneedstheresultsoftheharmonicanalysistopositionthesamplescorrectly