def _set_norm_parameter(self, norm=None, scaled_parameter=None):
"""Define properties of the norm spectral parameter."""
if norm is None:
norm = Parameter("norm", 1, unit="", interp="log")
norm.value = 1.0
norm.frozen = False
norm.min = scaled_parameter.min / scaled_parameter.value
norm.max = scaled_parameter.max / scaled_parameter.value
norm.interp = scaled_parameter.interp
norm.scan_values = self.norm_values
norm.scan_min = self.norm_min
norm.scan_max = self.norm_max
norm.scan_n_values = self.norm_n_values
return norm
