 And do the same thing on FFTMON (U_3). You may scarcely find small 6kHz
after big 2kHz because of high floor noise. This FFT is together with "Hamming
Window".
If you open a monitor for FFTMON (U_4). Each spectrum has become bold and
you can easily find 6kHz, 10kHz, 14kHz... This FFT is together with "Blackman
Window".
If you open a monitor for FFTMON (U_5). The floor noise has become much
lower. This is convenient to see very tiny spectrums. This FFT is together
with "Blackman-Harris Window".
If you open a monitor for FFTMON (U_6). 2kHz looks sharp but 6kHz is difficult
to find because of high floor noise. This FFT is together with "Bartlett
Window".
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