AM FM Modulation

[Klammraute]

I have a range in which both AM and FM modulation can occur. Now, I initially divided the range into two groups: 26MHz to 28MHz for AM and 26MHz to 28MHz for FM. However, it always picks up AM modulation even though the transmission was in FM modulation. Now, my question is: is it possible for the scanner to automatically choose the modulation, or does it always pick one modulation for a range?
i tried these two settings, but its not working

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