ASK
Amplitude deviation Irregularity
Amplitude Shift Keying

At one of the modulation techniques which convert digital value to the analog signal, the system which allots value to amplitude of the sine wave. Making value the respective amplitude correspond combining the wave of the amplitude which differs, it expresses information. The circuit may be relatively simple, but it is easy to receive the influence of amplitude variation.It is usedin the load machine of ETC and radio communication etc. of the gate. Can the International Morse Code regard one kind of ASK of binaries.