Patent ID: 8483341

Claim:
A signal generation system comprising: first and second signal generators, each having means for providing a frequency variable sampling clock, means for dividing the frequency variable sampling clock to provide a divided clock, means for sequentially controlling a waveform data supply order, means for providing waveform data according to the divided clock, timing control means for detecting a phase of the divided clock and providing a timing signal that controls the waveform data supply order, means for delaying the waveform data by one frequency variable sampling clock, means for parallel to serial converting the waveform data from the means for delaying and providing fast waveform data according to the frequency variable sampling clock and central control means for controlling the respective first and second signal generators; and communication means for providing the frequency variable sampling clock and the timing signal of the first signal generator to the second signal generator and for communicating information between the central control means of the first and second signal generators wherein when the frequency of the frequency variable sampling clock of the first signal generator is changed, the number of clock cycles of the frequency changed frequency variable sampling clock representative of a delay amount of the communication means is calculated and the means for delaying of the first signal generator delays the waveform data, thereby adjusting a phase relationship between the fast waveform data generated in the first and second signal generators.