SignalAnalyzerUserManual.pdf

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.

1 www.rs-met.com

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.

2 www.rs-met.com