scope:

The present document specifies the minimum performance and the methods of measurement of wide band audio links. The present document covers the minimum characteristics considered necessary in order to make the best use of the available frequencies. It does not necessarily include all the characteristics which may be required by a user, nor does it necessarily represent the optimum performance achievable. The present document applies to modulation systems operating on radio frequencies between 25 MHz and 3 GHz. Although analogue FM is at present used for the majority of wide band audio links, the present document does not preclude any other constant carrier modulation technique, e.g. Gaussian Filtered Minimum Shift Keying (GMSK) or Generalized Tamed Frequency Modulation (GTFM), provided that the modulation spectrum lies within the specified spectral mask.