Rigol DS1000M Podręcznik Użytkownika Pobierz pdf (Strona 44)

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2-14 © Copyright RIGOL Technologies, Inc. 2007.

User’s Guide for DS1000 Series

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 dBVrms

scale. The dBVrms scale displays component magnitudes using a log

scale.

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Rigol DS1000M Podręcznik Użytkownika Strona 44