IEC 60489-6:1987

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