 And we can see the spectrum of Base Band by FFTMON (U_10). Open a monitor
for that.
There is a peak at 300Hz. That's because the Base Band is a 300Hz sine
wave.
Then let's open another WAVIN. Do left click to select WAVIN (U_1) below
and right click to choose "Open a Monitor".
You can see 3kHz sine wave that is from another Wave file. This is called
Carrier and we will modulate the Base Band by this Carrier.
Let's check the spectrum of the Carrier by another FFTMON (U_12).
There is a peak at 3kHz. That's because the Carrier is a 3kHz sine wave.
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