Rigol DS1074Z-S 4-channel oscilloscope, Digital Storage oscilloscope, DS1074Z-S 数据表
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产品代码
DS1074Z-S
RIGOL
DS1000Z User’s Guide
6-7
4. Vertical Scale
Press Scale and use
to adjust the vertical scale of the operation results.
5. Center Frequency
Press Center to adjust the frequency of frequency domain waveform relative to
the horizontal center of screen.
the horizontal center of screen.
6. Horizontal Scale
Press Scale and use
to adjust the horizontal scale of frequency domain
waveform.
7. Select Window Function
Spectral leakage can be considerably decreased when a window function is used.
DS1000Z provides four kinds of FFT window functions which have different
characteristics and are applicable to measure different waveforms. You need to
select the window function according to different waveforms and their
characteristics. Press Window to select the desired window function and the
default is “Rectangle”.
DS1000Z provides four kinds of FFT window functions which have different
characteristics and are applicable to measure different waveforms. You need to
select the window function according to different waveforms and their
characteristics. Press Window to select the desired window function and the
default is “Rectangle”.
Table 0-1 Window Functions
Window
Characteristics
Waveforms Suitable for
Measurement
Measurement
Rectangle The best frequency
resolution;
the poorest amplitude
resolution;
similar to the situation
when no window is
multiplied.
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.
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.
poorer amplitude
resolution.
Sine, periodic and narrow band
random noise.
random noise.
Hamming
A little bit better frequency
resolution than Hanning
resolution than Hanning
Transient or short pulse, the
signal levels before and after the
multiplication are rather different.