Rigol DS4024E User Manual page 145

Chapter 6 Operations and Measurements
Table 6-1 Window Functions
Window
Rectangle
Hanning
Hamming
Blackman
6. Specify the display mode
Press Display to select "Split" (default) or "Full Screen" display mode.
Split: the source channel waveform and the FFT operation waveform are

displayed separately. The time domain and frequency domain signals are
displayed clearly.
Full Screen: the source channel waveform and the FFT operation results are

displayed in the same window (full screen) to view the frequency spectrum
more clearly and to perform more precise measurement.
Note: In FFT mode and when MATH is the active channel, you can also press
HORIZONTAL
7. Specify the vertical scale unit
Press Scale to select "dB" (default) or "Vrms".
dB: use the logarithmic mode to display the vertical amplitude.

DS4000E User's Guide
Characteristics
The best frequency
resolution.
The poorest amplitude
resolution.
Similar to the situation
when no window is
applied.
Better frequency
resolution.
Poor amplitude
resolution.
A little bit better
frequency resolution
than Hanning
The best amplitude
resolution.
The poorest frequency
resolution.
SCALE to quickly switch between "Split" and "Full Screen".
Waveforms Suitable for
Measurement
Transient or short pulse, the signal
levels before and after the
multiplication are basically the same.
Sine waveforms with the same
amplitudes and rather similar
frequencies.
Wide band random noise with relatively
slowly changing waveform spectrum.
Sine, periodic and narrow band random
noise.
Transient or short pulse, the signal
levels before and after the
multiplication are rather different.
Single frequency signal, search for
higher order harmonics.
RIGOL
6-7