120 MHz DDS Function Generator
Description
120 MHz DDS function generator is an advanced signal generator that can generate a waveform of almost any shape. This function signal generator is made up of phase accumulator, waveform ROM, digital-analogue converter and low pass filter. It can be used for developing, testing and repairing electronic equipment.
Features
1. 120 MHz DDS function generator has the advantages of high resolution, accuracy and stability.
2. Wide range of sweep freq., start and stop freq. can be set independently.
3. VFD display and rubber keypad allow easy operation.
Parameters of 120 MHz DDS Function Generator
| Model | SM-4120 |
| Waveforms | |
| Main Waveforms | Sine, Square (Only sine is available above 40MHz) |
| Waveform Length | 8-16000 points |
| Amplitude Resolution | 12bit |
| Sampling Rate | 300MSa/S |
| 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 | 20MSa/S |
| Arbitrary Waveforms | |
| Waveform Length | 8-16000 points |
| Amplitude Resolution | 10bit |
| Sampling Rate | 20MSa/S |
| 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-120MHz 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-6Vpp (50Ω) Square: 1mVpp-1Vpp (50Ω), 2mVpp-2Vpp (Open) |
| Accuracy | ±1%+0.2mV (Sine 1kHz) |
| Flatness | Amplitudes≤1Vpp (50Ω load): ≤±0.5dB Amplitude>1Vpp (50Ω load): ≤±1dB |
| Resolution | 4 digit display: 0.1 mV (Output and Offset) |
| DC Offset | (F≤40MHz) 1Vpp/2+DCI ≤ 5 (50Ω load), 1Vpp/2+DCI≤ 10 (Open) Accuracy: ±10%+2mV (Note: No offset when freq. over 40MHz) |
| 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-10/20/40/80/120MHz |
| 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-120MHz |
| 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-120MHz |
| 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-120MHz |
| 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-120MHz |
| 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. 120 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, regular cleaning should be carried out.
2. Please use a soft cloth with mild detergent and water. Do not spray cleaner directly onto the instrument.
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