20 MHz DDS Function Generator
Description
20 MHz DDS function generator is an advanced signal generator that can generate a waveform of almost any shape. It can be used for developing, testing and repairing electronic equipment.
Features
1. 20 MHz DDS function generator features high resolution, accuracy and stability.
2. VFD display and rubber keypad allow easy operation of arbitrary waveform generator.
3. Wide range of sweep freq., start and stop freq. can be set independently.
Parameters of 20 MHz DDS Function Generator
| Model | SM-4020 |
| Waveforms | |
| Main Waveforms | Sine, Square (Only sine is available above 40MHz) |
| Waveform Length | 8-16000 points |
| Amplitude Resolution | 12bit |
| Sampling Rate | 200MSa/S4 |
| Built-in Arbitrary | Triangle, +Ramp, +Pulse, Rise/fall exponential, Rise/fall logarithm, Gauss noise, Cardiac, SIN(X)/X, DC. |
| Waveform Length | 8-16000 points |
| Amplitude Resolution | 10 bits |
| Sampling Rate | 10MSa/S4 |
| Arbitrary Waveforms | |
| Waveform Length | 8-16000 points |
| Amplitude Resolution | 10bit |
| Sampling Rate | 10MSa/S4 |
| Memory | 6*4k |
| Waveform Characteristic | |
| Sine Harmonic Distortion | -35dBc |
| Sine Distortion | ≤1% (20Hz-100KHz) |
| Square Rise/fall Time | ≤10ns |
| Frequency Characteristic | |
| Frequency Range | 1. Main Waveforms: 100µHz-20MHz 2. Built-in Arbitrary: 10mHz-100kHz 3. Arbitrary Waveforms: 10mHz-100kHz |
| Resolution | 1µHz |
| Freq. Accuracy | ≤±5PPm |
| Temperature Coefficient | ≤2PPm/°C |
| Output Characteristic | |
| Amplitude | Sine: 1mVpp-10Vpp(50Ω) 2mVpp-20Vpp(Open) Square: 1mVpp-10Vpp(50Ω);2mVpp-20Vpp(Open) |
| Accuracy | ±1%+0.2mV (Sine 1kHz) |
| Flatness | Amplitudes≤1Vpp(50Ω load): ≤±0.5dB Amplitude>1Vpp(50Ω load): ≤±0.5dB(20MHz), ≤±1dB(40MHz or above) |
| Resolution | 4 digit display: 0.1 mV (0utput and Offset) |
| DC Offset | 1Vpp/2+DCI ≤ 5 (50Ω load), 1Vpp/2+DCI≤ 10 (Open), Accuracy: ±10%+2mV |
| Units | Vpp, mVpp, dBm, Vrms, mVrms |
| Pulse Duty Rate | 0.1%-99.9% (F≤10KHz), 1%-99% (10KHz<F<100KHz) |
| Modulation | |
| Amplitude Modulation (AM) | |
| Carrier Waveform | Sine, Square |
| Carrier Freq. Range | 100µHz-20MHz |
| Modulation Waveform | Sine, Square, Triangle, +Ramp, +Pulse, Rise/fall exponential, Rise/fall logarithm, Gauss noise, Cardiac, SIN(X)/X, DC. |
| Modulation Freq. Range | 100µHz-20kHz |
| Modulation Depth | 1%-120% |
| Modulation Distortion | <2% |
| Source | INT/EXT (Ext. AM: ±5V=100%) |
| Frequency Modulation (FM) | |
| Carrier Waveform | Sine, Square |
| Carrier Freq. Range | 100µHz-20MHz |
| Modulation Waveform | Sine, Square, Triangle, ±Ramp, +Pulse, Rise/fall exponential, Rise/fall logarithm, Gauss noise, Cardiac, SIN(X)/X, DC. |
| Modulation Freq. Range | 100µHz-10kHz |
| Max. Deviation | 50% of carrier freq. |
| Frequency-shift Keying (FSK) | |
| Waveform | Sine, Square |
| Frequency Range | 100µHz-20MHz |
| Alternate Time | 0.1ms-100s ±1% (10mHz-10kHz) |
| Control Mode | INT/EXT (External TTL level, F1: low-level, F2: high-level) |
| Phase-shift Keying (PSK) | |
| Waveform | Sine, Square |
| Frequency Range | 100µHz-20MHz |
| Phase Range (P1, P2) | 0-360°, Resolution: 0.1° |
| Alternate Time | 0.1ms-100s ±1% |
| Control mode | INT/EXT (External TTL level, P1: low-level, P2: high-level) |
| Burst | |
| Waveform | Sine, Square, Triangle, ±Ramp, ±Pulse, Rise/fall exponential, Rise/fall logarithm, Cardiac, SIN(X)/X. |
| Frequency Range | 10mHz-100KHz |
| Counting | 1-10000 circles |
| Start Phase | 0-360°, Resolution: 0.1° |
| Alternate Rate | 0.1ms-100S ±1% |
| Trigger Source | INT, EXT, Single |
| Sweep | |
| Waveform | Sine, Square |
| Frequency Range | 100µHz-20MHz |
| Amplitude Range | (F≤40MHz) 1mVpp-10Vpp (50Ω), 2mVpp-20Vpp (Open) (F>40MHz) 1mVpp-1Vpp (50Ω), 2mVpp-2Vpp (Open) |
| Sweep Mode | Linear, Logarithmic, Rise, Fall, Single |
| Sweep Time | 0.1ms-100s ±1% |
| Trigger Source | INT, Single |
| Storage Characteristic | |
| Parameters | Freq., Amplitude, Waveform, DC Offset and Function Status. |
| Capacity | 8 sets of set-ups |
| Recall Mode | Entire set of parameters is recalled with respective number |
| Storage Time | Over 10 years |
| Frequency Counter (Option) | |
| Freq. Range | 1Hz-100MHz, Totalizing: ≤50MHz |
| Input Resolution | 50mVrms (f: 1Hz-50MHz), 100mVrms (f: 1Hz-100MHz) |
| Input Impedance | R>500kΩ, C<30PF |
| Coupling | AC |
| Waveforms | Sine, Square |
| Gate Time | 10ms -10s continuously variable |
| Display Digits | 8digits (Gate Time >5s) |
| Counting Capacity | ≤4.29×109 |
| Measurement Error | Time Base Error + Trigger Error (Trigger Error ≤ 0.3 when S/N > 40dB) |
| Time Base | Type: Mini TXCO Basic Freq.: 10MHz Stability: Better than ±1 ×10-6 (22°C±5°C) |
| Others | |
| Interface (Option) | RS-232C or GPIB |
| Line Power | Voltage: 198-242V, Freq.: 47 to 53Hz, Power consumption: <35VA |
| Ambient | 0-40°C |
| Size & Weight | 260 × 395 × 100(mm) Approx.5kg |
Notes
1. 20 MHz DDS function generator should adopt suitable line voltage.
2. To avoid electrical shock, the grounding conductor of power cord should be connected to ground.
Maintenance
1. To maintain good ventilation of arbitrary waveform generator, regular cleaning should be carried out.
2. Use a soft cloth with mild detergent and water when cleaning the machine. Please do not spray cleaner directly onto the instrument.
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