Is it easy to find free (as in freedom) DAB receivers?. Analog radio circuits are easy to examine, but I suspect that DAB receivers must be impossible to examin

Is it easy to find free (as in freedom) DAB receivers?. Analog radio circuits are easy to examine, but I suspect that DAB receivers must be impossible to examine thoroughly for obvious reasons. There might be some security concerns because of it. What have the Norwegian authorities said about that?.