IEC 60181:1964

Applies to mobile radio receivers having audio-frequency bandwidths generally not exceeding 10 kHz for the reception of voice and other types of signals using: a)angle (Type G or F: phase/frequency) modulation, or b)double-sideband amplitude (Type A) modulation with full carrier, or c)single-sideband amplitude (Type H, J or R) modulation with full, reduced or suppressed carrier. Standardizes the definitions, conditions and the methods of measurement used to ascertain the performance of selective-calling receiver-decoders.