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The SFG-2104 is a Function Generator from Instek. A function generator Call
GW Instek SFG-2104 Function Generator; 4 MHz $342
SFG-2104 - GW Instek Function Generators Call
GW Instek SFG-2104 DDS Technology and FPGA Chip Design Frequency Rang Call

GW Instek SFG-2104 (SFG-2120 Series) Main Features and Specifications

GW Instek SFG-2104

  GW Instek SFG-2104 Specs (879.1 KB)
Frequency Range Min.  100.0 mHz 
Frequency Range Max.  4.0 MHz 
Freq. Resolution  100 mHz 
Waveform Outputs  Sine, Square, Triangle, TTL, CMOS  
Modulation  AM, FM, LIN/LOG Sweep  
Status -
GW Instek

Based on the Direct Digital Synthesized (DDS) technology and unique FPGA design, the SFG-2000 and SFG-2100 Series Function Generators are built with exceptionally high performance far exceeding that of any conventional function generators at a very competitive price. Stable output frequency, low distortion, and fine frequency resolution are the most remarkable characteristics of this product series.

The SFG-2000 and SFG-2100 Series include four members in each family at 4MHz, 7MHz, 10MHz and 20MHz bandwidth. As a result of the 20ppm stability level and output waveform accuracy, the SFG-2000 and SFG-2100 Series fit into a wide variety of applications, such as signal generator for experiment labs, reference signal for PLL (Phase Locked Loop), and calibration and adjustment source for electronic devices.

The SFG-2000 and SFG-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 ranges 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 provides advanced functions such as AM/FM modulation, sweep mode, and a built-in frequency counter.

The SFG-2000 and SFG-2100 Series generate signals by continuously delivering a series of sampling values from a sine waveform table (stored in RAM) to a 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 and SFG-2100 Series are able to provide a stable output with very low waveform distortion.

  • DDS Technology and FPGA Chip
  • Design Frequency Range:0.1Hz  - 4MHz
  • 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
  • Build-in 6 Digits 150MHz/High Resolution Counter
  • INT/EXT AM/FM Modulation
  • LIN/LOG Sweep Mode

Specifications for the SFG-2104:

  • Frequency range for sine, square: 0.1 Hz - 4 MHz
  • Frequency range for triangle: 0.1 Hz - 1 MHz
  • Frequency resolution: 0.1 Hz
  • Output function: Sine, square, triangle
  • Amplitude range: 2 mV - 10 Vp-p into 50 Ω
  • Impedance: 50 Ω ±10%
  • Attenuator: -20 dB ±1 dBx2
  • DC offset: <-5 V - >+5 V into 50 Ω
  • Duty cycle (square wave): 20% to 80%, 2 Hz - 1 MHz
  • Range resolution: 1%
  • Display: 9 digits LED display
  • Sine wave harmonics distortion: -55 dBc at 0.1 Hz ~ 200 kHz, -40 dBc at 0.2 MHz ~ 4 MHz
  • Triangle wave linearity: ≥98% at 0.1 Hz ~100 kHz, ≥95% at 100 kHz ~ 1 MHz
  • Square wave symmetry: ±1% of period + 4 ns, 0.1 Hz ~ 100 kHz
  • Square wave rise or fall time: ≤25 ns at maximum output into 50 Ω
  • CMOS output level: 4 Vp-p ±1 Vp-p ~ 15 Vp-p ±1 Vp-p adjustable
  • TTL output level: ≥3 Vp-p
  • TTL output rise and fall time: ≤25 ns
  • Sweep operation rate: 100:1 ratio maximum and adjustable
  • Sweep operation time: 1 s ~ 30 s adjustable
  • Amplitude modulation frequency: DC ~ 1 MHz (EXT)
  • Amplitude modulation carrier BW: 100 Hz ~ 5 MHz (-3dB)
  • Frequency modulation range: 400 Hz fixed (INT), 1 kHz fixed (EXT)
  • Frequency counter range: 5 Hz ~ 150 MHz