User`s guide

RIGOL 6 To Make Measurements
DS2000 User’s Guide
6-6
characteristics. Press Window to select the desired window function and the
default is “Rectangle”.
Table 6-1 Window Functions
Window Characteristics
Waveforms Suitable for
Measurement
Rectangle
The best frequency
resolution;
the poorest amplitude
resolution;
similar to the situation
when no window is
multiplied.
Transient or short pulse, the signal
levels before and after the
multiplication are basically the same;
Sine waveforms with the same
amplitude and rather similar
frequencies;
Wide band random noise with
relatively slowly changing waveform
spectrum.
Hanning Better frequency
resolution;
poorer amplitude
resolution.
Sine, periodic and narrow band
random noise.
Hamming A little bit better
frequency resolution
than Hanning
Transient or short pulse, the signal
levels before and after the
multiplication are rather different.
Blackman The best amplitude
resolution;
the poorest frequency
resolution
Single frequency signal, search for
higher order harmonics.
3. Set the Display Mode
Press Display to select “Split” (default) or “Full Screen” display mode.
Split: the source channel and the FFT operation results are displayed separately.
The time domain and frequency domain signals are displayed clearly.
Full Screen: the source channel and the FFT operation results are displayed in
the same window 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
SCALE to switch between “Split” and “Full Screen”.