Rigol MSO/DS2000A Series Uživatelský manuál stáhnout pdf (Strana 142)

RIGOL Chapter 6 MATH and Measurements

6-6 MSO2000A/DS2000A User’s Guide

Note: In FFT mode and when MATH is the active channel, you can also press

HORIZONTAL

SCALE to switch between “Split” and “Full Screen”.

4. Set Horizontal Position and Horizontal Scale

The horizontal axis of the FFT operation results represents frequency and its unit

is Hz. Use HORIZONTAL

POSITION and HORIZONTAL SCALE to

set the horizontal position and horizontal scale of the FFT frequency domain

waveform respectively.

Note: Setting the horizontal position can changing the center frequency of the

FFT operation results indirectly.

5. Set the Vertical Unit

Press Scale to set the vertical unit to dB or Vrms and the default is dB. dB and

Vrms use logarithmic mode and linear mode to display vertical amplitude

respectively. If you need to display the FFT frequency spectrum in a relatively

larger dynamic range, dB is recommended.

6. Set Vertical Position and Vertical Scale

Press

and and use to set the vertical offset and vertical scale of

the FFT frequency domain waveform respectively.

7. Anti-Aliasing

Press Scale to enable or disable the anti-aliasing function.

8. Label

Press Label to define a label for the operation results. For the details, please

refer to “

MATH Label”.

Tips

 Signals with DC components

or deviation would cause error or deviation of the

FFT waveform components. To reduce the DC components, set the “Channel

Coupling” to “AC”.

 To reduce the random noise and aliasing frequency components of repetitive or

single pulse, set the “Acquisition Mode” of the oscilloscope to “Average”.

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Rigol MSO/DS2000A Series Uživatelský manuál Strana 142