


These function generators use Direct Digital Synthesized (DDS) technology to provide accurate and stable frequency performance, with high waveform fidelity with conventional analogue control of waveform output amplitude and DC offset. Frequency and duty cycle settings can be entered directly via the keypad and spinwheel and stored in internal memory.
9 digit LED display
Digital control of frequency & duty cycle
10 memory storage of frequency & duty cycle setup
High accuracy & high stability
Sine /Square & triangular waveform
Duty cycle control
Variable DC offset control
Low distortion Sine Wave
| Model | GFG2004 | GFG2007 | GFG2020 | GFG2120 |
| Frequency | ||||
| Range (Sine, Square) | 0.1Hz to 4MHz | 0.1Hz to 7MHz | 1Hz to 20MHz | 1Hz to 20MHz |
| Range (Triangle) | 0.1Hz to 1MHz | 0.1Hz to 1MHz | 1Hz to 1MHz | 1Hz to 1MHz |
| Resolution | 0.1Hz | 0.1Hz | 1Hz | 1Hz |
| Stability | ±20 ppm | ±20 ppm | ± 20 ppm | ± 20 ppm |
| Accuracy | ±20 ppm | ±20 ppm | ± 20 ppm | ± 20 ppm |
| Output | ||||
| Range | 10Vpp (into 50Ω load) | 10Vpp (into 50Ω load) | 2mV to 10Vpp (into 50Ωload) | 2mV to 10Vpp (into 50Ωload) |
| Flatness (Sinewave relative to 1kHz) | < ±0.3dB, 0.1Hz to 1MHz; < ± 0.3dB ±0.5dB 1MHz to 4MHz | < ±0.3dB, 0.1Hz to 1MHz; < ±0.5dB 1MHz to 4MHz; < ±2.0dB 4MHz to 7MHz | < ± 0.3dB, 0.1Hz to 1MHz; < ± 0.5dB, 1MHz to 4MHz; < ± 2dB, 4MHz to 10MHz | < ± 0.3dB, 0.1Hz to 1MHz; < ± 0.5dB, 1MHz to 4MHz; < ± 2dB, 4MHz to 10MHz |
| Output impedance | 50Ω | 50Ω | 50Ω | 50Ω |
| Attenuator | -20dB ±1dBx2 | -20dB ±1dBx2 | -20dB±1dB´2 | -20dB±1dB´2 |
| DC offset | <-5V to >+5V(into 50Ω load) | <-5V to >+5V(into 50Ω load) | < -5V to >+5V(into 50Ωload) | < -5V to >+5V(into 50Ωload) |
| Duty Control (sq wave only) | 20 % to 80 % below 1MHz | 20 % to 80 % below 1MHz | 20% to 80%, 2Hz to 1MHz | 20% to 80%, 2Hz to 1MHz |
| Sinwave harmonic distortion | -55dBc 0.1Hz to 200kHz ; -40dB 0.2MHz to 4MHz | -55dBc 0.1Hz to 200kHz ; -40dB 0.2MHz to 4MHz; -30dBc 4MHz to 7MHz | -55dBc, 0.1Hz to 200kHz -40dBc, 0.2MHz to 4MHz -30dBc, 4MHz to 10MHz (Specification applied from MAX. to 1/10 level) | -55dBc, 0.1Hz to 200kHz -40dBc, 0.2MHz to 4MHz -30dBc, 4MHz to 10MHz (Specification applied from MAX. to 1/10 level) |
| Triangle Wave linearity | ≥98 % 0.1Hz to 100kHz ; ≥95 % 100kHz to 1MHz | ≥98 % 0.1Hz to 100kHz ; ≥95 % 100kHz to 1MHz | ≥98 % 0.1Hz to 100kHz ; ≥95 % 100kHz to 1MHz | ≥98 % 0.1Hz to 100kHz ; ≥95 % 100kHz to 1MHz |
| CMOS Output level (adjustable; rise / fall time ≤120ns) | 4Vpp ± 1Vpp to 14.5V ±0.5Vpp | 4Vpp ± 1Vpp to 14.5V ±0.5Vpp | 4Vpp±1Vpp to 14.5Vpp±0.5Vpp | 4Vpp±1Vpp to 14.5Vpp±0.5Vpp |
| TTL Output | ≥3Vpp; Fan out 20 TTL loads rise / fall time ≤25ns | ≥3Vpp; Fan out 20 TTL loads rise / fall time ≤25ns | ≥3Vpp; Fan out 20 TTL loads rise / fall time ≤25ns | ≥3Vpp; Fan out 20 TTL loads rise / fall time ≤25ns |
| Power Source | AC 115V/230V±15 % 50/60Hz | 115V/230Vac ±15 % 50/60Hz | AC115V±10%, 230V+10%/-15%, 50/60Hz | AC115V±10%, 230V+10%/-15%, 50/60Hz |
Power cord, test lead and Instruction manual
| Maximum Frequency Range Sinewave | 4MHz | |
| Minimum Frequency Range Sinewave | 0.1Hz | |
| Maximum Frequency Range Square Pulse and Arbitrary Waveform | 4MHz | |
| Minimum Frequency Range Square Pulse and Arbitrary Waveform | 0.1 Hz | |
| Maximum Frequency Range Triangle/Saw | 1MHz | |
| Minimum Frequency Range Triangle/Saw | 0.1Hz | |
| Digital Frequency | Yes | |
| Time Base Accuracy | ±20ppm | |
| Attenuation | -20dB | |
| TTL Output Level | 3V | |
| Output Impedance | 50Ω | |
| Model Number p | GFG-2004 | |
| Frequency Range Square Pulse and Arbitrary Waveform | 0.1 Hz → 4 MHz | |
| Output Amplitude | 10V Pk-Pk | |
| CMOS Output Level | 4 → 15V Pk-Pk |