This weekend I did not spend much time on the project.
However I was able to make a few improvements.
-Spectrum is not inverted anymore. I have added an inverter using an opamp. I have
changed the software to stop inverting the Sweep signal.
-Added blanking output signal in software. One of the IO pins provides a blank
signal. It is needed for the flyback.
I discovered that the 24 V power supply has a ripple. This caused the spectrum to
jump around a bit. The 24 transformer can not provide enough current.
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