Rigol DS6104 - Page 6

RIGOL TECHNOLOGIES USA INC
877-4-RIGOL-1 How-To Guide
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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scope sdisplay.
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 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.
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Howtosaveawaveform'sFFT?
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 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.
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