Policy on Intellectual Property Right (IPR)
 1     Protection ratios for analogue narrow-band land mobile systems (20 and 25 kHz)
 2     Protection criteria for service ancillary to broadcasting/service ancillary to programme-making (SAB/SAP) (analogue wideband land mobile systems)
        2.1     Protection ratios for radio microphones
        2.2     Protection ratios for audio OB links
 3     DVB-T and T-DAB spectrum masks
        3.1     DVB-T spectrum masks for out-of-band emissions
        3.2     T-DAB spectrum mask
Interpolation example