I took a building break. I wanted to finish my CB to 40 meter transverter.
Now this project has finished so I will continue building the spectrum analyzer.
I made the connection between the analog board and the microcontroller. Now I can control the sweep amplitude and the DC offset. I also added a switch to speed up tuning. When pressed the tuning speed is 5 MHz per click instead of 1 MHz per click.
Next task is to improve the software. I want to prevent impossible situations. For example: center frequency is 10 MHz and the span is 20 MHz/ division. That would suggest negative frequencies on the left of the screen.
After that I will make a frequency counter in software. Then I can display the actual center frequency. I could use this counter to adjust the center frequency as described in my previous logs.
