Campbell-scientific CR800 and CR850 Measurement and Control Systems Manual do Utilizador Página 266

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Section 7. Installation
266
Therecordedamplitudeforthisexampleshouldbeabout1/3ofthe
inputsignalamplitude.Aprogramwaswrittenwithtwostored
variables:Accel2andAccel2RA.Therawmeasurementwasstoredin
Accel2,whileAccel2RAwastheresultofperformingarunningaverage
ontheAccel2variable.Bothvalueswerestoredatarateof50
0Hz.
FigureRunningAverageSignalAttenuation
(p.267)showthetwovalues
plottedinasinglegraphtoillustratetheattenuation(therunning
averagevaluehastheloweramplitude).
Theresultantdelay(delayintime)=(Scanrate)(N1)/2=2ms(101)/2=
9ms.Thisisabout1/3oftheinputsignalperiod.
Figure 83: Running-average frequency response
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