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120 MHz DDS Function Generator

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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