RIGOL DG1000 series function/arbitrary waveform generators use Direct Digital Synthesis (DDS) technology. They can generate accurate, stable, clean, low distortion signals. Each channel can create sine, square, ramp, pulse,or noise signals and coordinate with the other channel. These instruments each have 2 channels with the 2nd channel having a lower voltage output. Each DG1000 can output 4055 point arbitrary waves.