Rigol DS1102E User Manual

RIGOL
© 2008 RIGOL Technologies, Inc.
User’s Guide for DS1000E, DS1000D Series
2-11
1. Using the FFT
FFT (Fast Fourier Transform) transforms time domain signals to frequency domain
signals. The horizontal axis shows the frequency and the vertical axis shows the
amplitude dBVrms or Vrms. FFT function can not only to help you find crossfire
problem and analog waveform distortion caused by nonlinear amplifier, but also can
adjust the analog filter.
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 display FFT menu.
Figure 2- 17 Table 2- 6 The FFT menu
Menu
Settings Comments
Operate
A+B
A-B
A x 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
Define CH1 or CH2 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
Scale
Vrms
dBVrms
Set “Vrms ” as vertical unit
Set “dBVrms ” as vertical unit
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Rigol DS1102E Specifications

General

Bandwidth	100 MHz
Sample Rate	1 GSa/s
Channels	2
Memory Depth	1 Mpts
Vertical Sensitivity	2 mV/div to 10 V/div
Trigger Modes	Edge, Pulse, Video, Slope, Alternate
Vertical Resolution	8 bits
Input Coupling	DC, AC, GND
Power Supply	100-240 V AC, 45-440 Hz
Display	5.7 inch TFT LCD
Display Resolution	320 x 234
Interfaces	USB Host, USB Device
Input Impedance	1 MΩ ±2%, 15 pF ±3 pF
Dimensions	303 mm x 154 mm x 133 mm