|DDS Technology and FPGA Chip Design|
Frequency Range : 0.1Hz~4/7/10/20MHz
High Frequency Accuracy : ± 20ppm
High Frequency Stability : ± 20ppm
Frequency Resolution : 100mHz
Low Distortion Sine Wave : -55dBc,0.1Hz~200kHz
Front Panel Setting Save/Recall with 10 Groups of Setting Memories
Built-In 9 Digits, 150MHz/High Resolution Counter (SFG-2100 Series Only)
INT/EXT AM/FM Modulation (SFG-2100 Series Only)
LIN/LOG Sweep Mode(SFG-2100 Series Only)
Based on the Direct Digital Synthesized (DDS)technology and unique FPGA design, the SFG-2000/2100 Series Function Generatorsare built with exceptionally high performance far exceeding that of anyconventional function generators at a very competitive price. Stable outputfrequency, low distortion, and fine frequency resolution are the most remarkablecharacteristics of this product series.
The SFG-2000/2100 Series include four members ineach family at 4MHz, 7MHz, 10MHz and 20MHz bandwidth(perivd), The SFG-2100Series have additional functions of Sweep, AM/FM modulation, and ExternalCounter. As a result of the 20ppm stability level and output waveform accuracy,The SFG-2000/2100 Series well fit into a wide variety of applications, such assignal generator for experiment labs, reference signal for PLL (Phase LockedLoop), and calibration and adjustment source for electronic devices.
|The SFG-2000/2100 Series provide Sine, Triangle and Square waveforms with DC offset and variable duty cycle at 20ppm frequency stability and accuracy. The low drift rate and -55dBc low sine wave distortion output significantly extend product application range in various market sectors.|
The TTL/CMOS output is also available to fulfill various requirements. In addition to the basic functions, The SFG-2100 Series provide advanced functions such as AM/FM modulation, sweep mode, and Built-In Frequency Counter.
|DDS FG VS. CONVENTIONAL FG|
|The SFG-2000/2100 Series 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 SFG-2000/2100 Series is able to provide a stable output with very low waveform distortion. This is very different from the way a conventional FG 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 SFG-2000/2100 DDS FG, however, the waveform distortion remains low even when the output amplitude is at only 2mVpp.|