What is a function generator used for?

A function generator is a piece of electronic test instrument used to generate and deliver standard waveforms, typically sine and square waves, to a device under test. It can be used to test a design or confirm that a piece of electronic equipment is working as intended.

What’s the difference between a function generator and a signal generator?

A signal generator is any device that creates electronic signals. A vector signal generator specializes in creating RF signals with analog and digital modulation schemes in formats such as QAM, QPSK, FSK, BPSK, and OFDM. A function generator is a specialized piece of test equipment that has a preset list of waveforms or patterns that it can play. Function generators are known for their ability to rapidly switch from one frequency to another and are a more economical option than other more advanced waveform generators.

How do function generators work?

A function generator connects to a device under test (DUT) via test leads and creates voltage waveforms at a desired frequency to the DUT. Using the instrument’s front panel, the operator can change the parameters of a waveform, such as how fast it’s played, the amplitude and offset, or add basic distortion or modulation.

任意波函数发生器

当今的设计往往非常复杂，在测试过程中需要各种刺激信号。泰克的函数发生器是同类产品中的佼佼者，可提供优秀的频率灵活性，并确保每次都能准确地重现信号。

泰克函数发生器可生成预加载标准波形、任意波形和受损信号，可支持广泛的应用，并为不需要任意波形发生器高级功能的应用提供经济实惠的解决方案。

查找适合您应用的任意函数发生器，或浏览所有泰克信号发生器。

本页还包含以下内容

如何选择任意函数发生器
任意函数发生器常见问题

比较泰克任意函数发生器

型号	模拟通道	采样率	带宽	垂直分辨率	记录长度	输出频率范围	起价
AFG31000 任意函数发生器	1 - 2	250 MS/s - 2 GS/s	25 MHz - 250 MHz	14 位	16 MSa/通道	25 MHz - 250 MHz	US $2,930
AFG1000/X 任意函数发生器	2	125 MS/s - 300 MS/s	25 MHz - 60 MHz	14 位	8k 点 - 1M 点	25 MHz - 60 MHz	联系我们
AFG2000 任意函数发生器	1	250 MS/s	20 MHz	14 位	128k 点	20 MHz	US $2,710

产品系列比较


	AFG31000 任意函数发生器	AFG1000/X 任意函数发生器	AFG2000 任意函数发生器

How to choose an arbitrary function generator

Though there are a number of factors to consider when choosing the right arbitrary function generator for your bench, here are a few of the most important considerations.

Consideration	Description
Sample rate	This affects the frequency and fidelity of the main output signal. The sampling frequency must be more than twice that of the highest spectral frequency component of the generated signal to ensure accurate signal reproduction.
Bandwidth	The analog bandwidth of a signal generator’s output circuitry must be sufficient to handle the maximum frequency that its sample rate will support. In other words, there must be enough bandwidth to pass the highest frequencies and transition times that can be clocked out of the memory without degrading the signal characteristics.
Record length	This determines the maximum number of samples that can be stored and plays an important role in signal fidelity because it determines how many points of data can be stored to define a waveform. Particularly in the case of complex waveforms, memory depth is critical to reproducing signal details accurately.
Output frequency range	Perhaps one of the most important considerations—and often the biggest driver of price—is the frequency range. It’s essential to choose a function generator that can operate in a frequency range that supports your tests.
Noise and jitter	These two characteristics are very closely related and are essentially undesired distortions of the signal, which you want to keep as low as possible.
Number of channels	Depending on the application needs, a single output may be sufficient. But for IQ modulation for instance, two outputs are mandatory.
User interface	A large, modern touchscreen with responsive feedback has become a key factor in labs where test time is essential.