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Mark and Space are selected with the right and left cursor. The precision of the center frequency is very important and directly influences the performance of the decoder.
After every change, the center frequency and shift are automatically updated.
Automatic tuning is also available. It works perfectly as long as there is only one input signal present in the spectrum. To apply a filter, see Passband Filter Support.
Options can be set using the right mouse button or the context menu (see FFT/Sonagram Context Menu). It is possible to remove the tuning FFT or Sonagram in the View Menu.