Rigol DS1000B Manual do Utilizador descarregar pdf (Página 47)

RIGOL

User’s Guide for DS1000B Series

2-17

Key points for FFT

1. Signals that have a DC component or offset can cause incorrec

t FFT

waveform component magnitude values. To minimize the DC component,

choose AC Coupling on the source signal.

To reduce random noise and aliases components in repetitive or

single-shot events, set the oscilloscope acquisition mode to Average.

3. To display FFT waveforms with a large dynamic range, use the dBV

RMS

scale. The dBV

RMS

scale displays component magnitudes using a log scale.

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Rigol DS1000B Manual do Utilizador Página 47