SignalAnalyzerUserManual.pdf

(178 KB) Pobierz
SIGNALANALYZER-USERMANUAL
SignalAnalyzer-UserManual
WhatisSignalAnalyzer?
SignalAnalyzerisacombinedoscilloscope/spectrum-analyzerpluginforinspectingsignalsinrealtimein
thetime-andfrequencydomain.Theplugindisplaysthesignals(orspectra)oftwoinputchannels(which
aremostlyleftandrightchannelofastereosignal)inblueandgreenrespectively.Themodeofoperation
(oscilloscopeorspectrum-analyzer)canbeselectedviathe’Display’menuinthetopleftpartoftheuser
interface.Inbothmodes,youcanfreezethecurrentcontentofthedisplaywiththe’Freeze’buttontothe
right.Witharightclickonthedisplay,youcanalsoexportthecurrentcontentofthedisplayasa.png
imagefileora.svgvectorgraphicsfile.
TheOscilloscope/WaveformView
Whentheoption’Signal’isselectedinthe’Display’menu,thetimesignalitselfwillbedisplayedinan
oscilloscopelikefashion.Toadjustthetimewindowwhichwillbeshown,usethehorizontalzoom-widgets
atthebottomrightofthedisplayitselforalternativelythemouse-wheel.Tosynchronizethedisplayto
thesignal,the’Sync’menushouldbeused.Atthemomenttheonlyoptionhere(otherthannosyncat
all)isasynchronizationtothezerocrossingsofalowpassedversionoftheinputsignal(option’Lowpass
Zeros’).For(quasi)periodicsignals,thiswillhavetheeecttoshowamorestablewaveform.
1307190031.001.png
 
TheSpectrumView
SIGNALANALYZER-USERMANUAL
TheSpectrumView
Whentheoption’Spectrum’isselectedinthedisplaymenu,youwillseeaspectralanalysisplotofthe
incomingaudiosignal.Themenu’Method’providesatthemomentonlytheoption’FourierTransform’
whichmeans,thatthesignalspectrumisestimatedbytheubiquitousFFTalgorithm.Themenuwas
alreadyincludedforfutureinclusionofotherspectrumestimationmethods.The’Size’menunextto
it,choosestheFFTblocksizewhichwillbeused.The’Log’buttontoggleslogarithmicscalingofthe
frequencyaxison(oro).Toseeasectionofthespectrumingreaterdetail,youcanusethezoom-and
scroll-widgetsinthesamewayasintheoscilloscopeview.Ofcourse,freezingandexportisavailablehere
aswell.
1307190031.002.png
 
Zgłoś jeśli naruszono regulamin