Function generators are electronic test equipment that generate precise AC signals with adjustable frequency, amplitude, and waveform. They play a critical role in designing, testing, and repairing electronic circuits by simulating real-world signal conditions. These instruments enable engineers to verify circuit behavior under controlled parameters, making them indispensable in R&D, manufacturing, and educational settings.
| Type | Functional Features | Application Examples |
|---|---|---|
| Arbitrary Waveform Generators (AWG) | Custom waveform creation, high-resolution signal editing | Radar simulation, communication protocol testing |
| Signal Generators | Standard waveforms (sine, square, triangle), frequency sweeping | Component characterization, impedance measurement |
| Function Generators | Basic waveforms with variable duty cycle and offset | Educational labs, sensor testing |
| RFG Generators | High-frequency signal generation (GHz range) | Wireless communication testing, aerospace applications |
Typical function generators consist of:
| Parameter | Importance |
|---|---|
| Frequency range: 1 Hz - 1GHz | Determines application versatility |
| Output amplitude: -20dBm to +30dBm | Enables testing under various power levels |
| Waveform resolution: 12-16 bits | Affects signal fidelity |
| Sample rate: 1-10 GSPS | Dictates maximum frequency capability |
| Phase noise: -100dBc/Hz @1kHz offset | Critical for communication systems |
| Manufacturer | Representative Product | Key Features |
|---|---|---|
| Keysight Technologies | 33500B Series | 320 MSa/s sample rate, 16-bit resolution |
| Teledyne LeCroy | WaveStation 2000 | Arbitrary waveform capability, 25MHz bandwidth |
| NI (National Instruments) | PXIe-5433 | Modular design, 100MHz output |
| Rohde & Schwarz | SMA100B | 6GHz frequency range, ultra-low phase noise |
Key selection criteria include:
Example: For IoT device testing, select a generator with at least 20MHz bandwidth, built-in modulation schemes (AM/FM), and USB interface compatibility.
Current trends include:
Market forecasts indicate 7.2% CAGR through 2027, driven by 5G deployment and automotive electronics demand.