The time-continuous input signal is converted into a series of discrete digital output values. The A/D converter resolution determines the maximum possible number of digital values. Since this is always a discrete number, digitization always results in a deviation from the actual input signal, which is known as quantization error.
The sampling rate determines the interval between 2 conversions and must be selected to suit the type of processing planned for the signal. For many signal processing tasks, it is fundamentally important to adhere to the sampling theorem. The module performs appropriate filtering and decimation steps to ensure that the sampling theorem is adhered to at all times, regardless of the configured sampling rate.
In the time domain, a higher sampling rate allows for a more detailed description of the signal but also consumes a larger amount of memory. In the frequency domain, a higher sampling rate increases the maximum frequency that can be evaluated. Since a defined number of values is used for the FFT, however, the resolution decreases and thus the possibility of distinguishing frequency ranges close to each other.
时间连续的输入信号被转换为一系列离散的数字输出值。A/D转换器的分辨率决定了数字值的最大可能数量。由于这总是一个离散的数字，数字化总是导致与实际输入信号的偏差，这就是所谓的量化误差。
采样率决定了两次转换之间的间隔，必须根据计划对信号进行的处理类型来选择采样率。对于许多信号处理任务来说，遵守采样定理是至关重要的。该模块执行适当的滤波和抽取步骤，以确保无论配置的采样率如何，都始终遵守采样定理。
在时域中，较高的采样率可以对信号进行更详细的描述，但也会消耗较大的内存量。在频域中，较高的采样率增加了可以评估的最大频率。然而，由于FFT使用的是确定的数值，分辨率下降，因此区分彼此接近的频率范围的可能性也随之降低。
Information: 注意: On the X20CM4810, a MaxFrequency of 200 Hz results in a distance of 0.0629 Hz between 2 lines. 在X20CM4810上，MaxFrequency 为 200Hz 时，2条线之间的距离为 0.0629 Hz。 |