Instek SFG-1013 3MHz DDS Function Generator

The Instek SFG-1013 Function Generator is packed with features and performance, making it one of the most cost effective signal generators Instek has produced to date. Like the SFG-2020 Function Generator, the SFG-1013 is based on Direct Digital Synthesized (DDS) technology with a custom embedded FPGA. Stable output frequency, low distortion, and fine frequency resolution are the most remarkable characteristics of this product. With a 20ppm stability level and high output accuracy the Instek SFG-1013 Function Generator is suitable for a wide range of applications such as reference signals for Phase locked loops and calibration procedures. The Instek SFG-1013 Function Generator features a Voltage measure display whereas the SFG-1003 does not.

The Instek SFG-1013 Function Generator generates signals by continuously delivering a series of sampling values from a sine waveform table (stored in RAM) to DAC (Digital to Analog Converter) for waveform construction. With a low pass filter circuit to filter out the harmonics of the DAC output and smooth the signal, the Instek SFG-1013 Function Generator is able to provide a stable output with very low waveform distortion. This is very different from the way a conventional Function Generators generates a signal. Since a conventional FG needs to obtain its signal by switching current sources between positive and negative directions all the time, the "Ringing" distortion occurs at the peak of the signal waveform where the switching is activated. This distortion is especially serious when the output amplitude is low. For the INSTEK SFG-1013 DDS Function Generator, however, the waveform distortion remains low even when the output amplitude is at only 2mVpp.