RIGOL DS6000 Series - Manual (Page 130)

RIGOL 6 To Make Measurements
DS6000 User’s Guide 6-6
characteristics and are applicable to measure different waveforms. You need to
select the window function according to different waveforms and characteristics.
Press Window to select the desired window function and the default is
“Rectangle”.
Table 6-1 Window Function
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 straightforward.
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 to “Split” or “Full Screen”.