X20 system modules • Other functions • X20CM4810
X20 system User's Manual 3.10
2093
Resolution
Resolution refers to the difference between two two adjacent measurement data points. This specifies the size of
the distance between two lines along both the horizontal ("Time signal" or "Frequency spectrum") and vertical axis
("Quantization" of the amplitude).
An important factor affecting the quality of the resolution is the relationship between the number of measurement
data points and the sampled frequency. The larger this ratio, the more accurately the measured signals correspond
to the actual amplitude information. For example, 10,000 samplings of a 10 kHz signal yield a 10x more accurate
amplitude characteristic than of a 100 kHz signal.
Information:
On the X20CM4810, a MaxFrequency of 200 Hz results in a distance of 0.0629 Hz between two lines.
Time signal
The resolution can be identified in the time signal from the distance between two adjacent measurement points.
Example
A "MaxFrequencyRaw" of 2 kHz is used in this example.
Am
pl
itu
de
[
m
g]
Time [sec]
Sampling time [s] = 193 μs
Figure 660: Time signal from a module with corresponding resolution
Frequency spectrum
The resolution in the frequency spectrum indicates the distance between the individual frequency lines (spectral
lines) that can still be evaluated.
Example
Frequency spectrum at a MaxFrequency of 2 kHz.
Am
pl
itu
de
[
m
g]
Frequency [Hz
]
Frequency resolution = 0.6294 Hz
Figure 661: Frequency spectrum from the module
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