 The following schematic appears. This is to decrease Sampling frequency. (version 1.2 or higher is needed)  Left click on TXTIN (U_0) to select it and right click to choose "Open
a Monitor".  Then you will see a wave form on the monitor window. This wave's sampling
frequency is 400Hz.  And do the same thing on FFTMON(U_5) to open a monitor. This is to execute
FFT(Fast Fourier Transform).  Then its spectrum appears. That says this wave has 10Hz and 95Hz in itself.
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