Rigol MSO1000Z Series User Manual page 122

RIGOL
Table 6-1 Window Function
Window
Rectangle
Blackman
Hanning
Hamming
Flattop
Triangle
8. Select FFT Mode
Press Mode to set the data source of the FFT operation to "Trace" or
"Memory*".
Trace

― The data source of the FFT operation is the data of the waveform
― The FFT sample rate is the screen sample rate (namely 100/horizontal
Memory*

― The data source of the FFT operation is the data of the waveform in the
6-8
nd Quality Products Online at:
Characteristics
The best frequency
resolution;
the poorest amplitude
resolution;
similar to the situation
when no window is
multiplied.
The best amplitude
resolution;
the poorest frequency
resolution
Better frequency
resolution and poorer
amplitude resolution
compared to
Rectangle window.
A little bit better
frequency resolution
than Hanning
Accurate
measurement of
signal.
Better frequency
resolution.
displayed on the screen; the length is up to 1200 points.
time base).
memory; the length is up to 16384 points. When the memory depth
doesn't exceed 16384 points, all of the data is used for FFT operation.
Otherwise, the instrument will read data of 16384 points according to
the trigger position; the read rule is as follows:
If the trigger position is before the start point of the memory, the

instrument will read the data of 16384 points from the start point
of the memory.
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Chapter 6 MATH and Measurement
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 amplitude
and rather similar frequencies;
Wide band random noise with waveform
spectrum changing relatively slower.
Single frequency signal, search for
higher order harmonics.
Sine, periodic and narrow band random
noise.
Transient or short pulse, the signal levels
before and after the multiplication are
rather different.
Signal without accurate reference and
require to accurately measurement.
Narrow band signal with stronger
interference noise.
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