Adopt the Direct Digital Synthesizer (DDS) technology and provide stable, precise, pure and low distortion signals. Sweep Function: It can sweep 4 properties of signals including frequency, amplitude, offset and duty cycle; It has Linear and Logarithm two sweep types; 0.01S~999.99S sweep time; Up, Down and roundtrip sweep directions Save function: It can save 12 sets user-set parameters and can be loaded at any time Communicating function: All functions can be controlled by PC program and the communication protocol is open for secondary development. Output short-circuit protection: All channels can work more than 60 seconds when the load is short-circuited.