Rigol DS1104B Guia 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 incorrect FFT

waveform component magnitude values. To minimize the DC component,

choose AC Coupling on the source signal.

2. 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 DS1104B Guia do Utilizador Página 47