Sampling rate up to 250MSa/s. Built-in arbitrary waveform with 250 MSa/s sampling rate. 4 downloadable 2048 dots arbitrary waveform memories. Fully numerical control. It can display and numerical control amplitude, offset, frequency, duty cycle of current signal output and phase difference of two channels. And dual-channel arbitrary integer multiples of the frequency output when no phase error signal phase drift; Each function can be adjusted by host computer. Preinstalled 17 common waveforms. High frequency accuracy: magnitude 10-6. High resolution: Full range frequency resolution can be 10 mHz. Both main and subsidiary wave duty cycle are adjustable separately (0.1%~99.9%). All range continuously adjustable, digital directly setting. Arbitrary waveform: User can load arbitrary waveform according to the need. With 12 bit wide waveform generator, the output waveform can be more delicate with low distortion.