Rigol DS1104B Guide de l'utilisateur télécharger pdf (Page 46)

RIGOL

User’s Guide for DS1000B series

2-16

1. Using FFT function

The FFT (Fast Fourier Transform) process converts a time-domain signal into its

frequency components mathematically. FFT waveforms are useful in the

following applications:

 Measuring harmonic content and distortion in systems

 Characterizing noise in DC power supplies

 Analyzing vibration

Press MATH→Operate→FFT to enter FFT setting menu.

Figure 2-18 Table 2-8 The FFT menu (Page 1/2)

Settings

Comments

Operate

A+B

A-B

A× B

FFT

Add source A to source B.

Subtract source B from source A.

Multiply source B by source A.

Fast Fourier Transform.

Source

CH1, CH2,

CH3, CH4

Define CH1, CH2, CH3 or CH4 as FFT

source.

Window

Rectangle

Hanning

Hamming

Blackman

Select window for FFT.

Display

Split

Full screen

Display FFT waveform on half screen.

Display FFT waveform on full screen.

Figure 2-19 Table 2-9 The FFT menu (Page 2/2)

Settings

comments

The multifunctional knob ( ) adjusts

the vertical position of Math

The multifunctional knob ( ) adjusts

the vertical amplitude of Math

Scale

RMS

dBV

RMS

Set V

RMS

as vertical scale unit

Set dBV

RMS

as vertical scale unit

Reset

Reset the math waveform to vertical

mid-point.

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Rigol DS1104B Guide de l'utilisateur Page 46

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