IEC 60489-3:1979

Deals with the definitions, the conditions and the methods of measurement used to ascertain the performance of receivers having audio-frequency bandwidths generally not exceeding 10 kHz for the reception of voice and other types of signals, using angle modulation (phase/frequency modulation), or double-sideband amplitude modulation with full carrier. This standard is intended to be used in conjunction with IEC 489-1.