International Telecommunication Union (ITU) designations

In 1982, the International Telecommunication Union (ITU) designated the types of amplitude modulation:

Designation Description
A3E double-sideband a full-carrier – the basic Amplitude modulation scheme
R3E single-sideband reduced-carrier
H3E single-sideband full-carrier
J3E single-sideband suppressed-carrier
B8E independent-sideband emission
C3F vestigial-sideband
Lincompex linked compressor and expander

#http://en.wikipedia.org/wiki/Amplitude_modulation

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