GW Instek SFG-2120

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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 Technique and FPGA Chip Design
• Frequency Range: 0.1Hz~4/7/10/20MHz
• High Frequency Accuracy: ± 20ppm
• 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
• INT/EXT AM/FM Modulation
• LIN/LOG Sweep Mode

Specifications for the SFG-2120:

• Frequency range for sine, square: 1 Hz - 20 MHz
• Frequency range for triangle: 1 Hz - 1 MHz
• Frequency resolution: 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, -30 dBc at 4 MHz ~ 10 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