?EASY OPERATION?---The instrument USES direct digital frequency synthesizer (DDS) technology to provide stable, accurate, pure and low-distortion signals. Rich keyboard shortcuts and graphical user interface simplify each operation, easy to operate. ?WAVEFORM CHARACTERISTICS?---The display interface adopts 2.4-inch TFT color LCD, which makes the operation more intuitive and convenient.The instrument USES A 14-bit high D/A conversion chip (5Vpp output quantization error less than 1mV), A sampling rate of 250MSa/s, and A vertical resolution of 14bit.Surface mount technology can improve anti - interference and service life. ?APPLIANCE?---Various modulation types: AM, FM, PM, ASK, FSK and PSK modulation.Scanning function: four properties of the scannable signal, including frequency, amplitude, offset and duty cycle; It has two kinds of Linear and Logarithm scanning type; Scanning time: 0.01S-9999.99S; Up, down and round trip scanning directions. Output short circuit protection: when the load short circuit, all channels can work for more than 60 seconds. ?SERVICE RELIABLE SERVICE?--- In addition, we have an excellent after-sales service. Customer service is available 24 hours, and 24 months free replacement.We are responsible sellers. If you are not satisfied with the product you received, you can always send us emails. We will respond as soon as possible and help you solve your problem. ?FULL FUNCTION?---VCO function (voltage control output): it can be realized by external input signal: voltage control frequency, voltage control amplitude, voltage control offset, voltage control duty ratio and PWM modulation.Function of 100M frequency meter: it can measure frequency, period, pulse width and duty ratio. The frequencies that work are 100MHz and Min. Frequency behavior: 0.01 Hz.Counter function: there are 2 coupling measurement modes, including DC coupling and AC coupling.