GuidoAccording to Crun suggestions, I would try to build a lowpass filter like this:
Low Pass Filter
A project log for 32MHz spectrum + SDR + FT8 in an FPGA
A 0 - 32MHz FPGA based Software Defined Radio (AM SSB FT8) by ready modules->cheap and easy Last add: Oct 6th FT8 VHDL GFSK modulator
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