Modulation Domain is a plane domain which is consisted of frequency and time of signals. It shows the relation between frequency and time. It is a necessary field to measure signals in three-dimension space of signal ( time domain, frequency domain and modulation domain). Modulation domain analysis offers a unique method for viewing complex modulated signals. Modulation Domain Analyzer (MDA) is used in a wide range of applications including digital communication system, radar and electronic warfare system, ...