There are many ways of classifying signal sources, one of which can be divided into mixed signal sources and logical signal sources.The mixed signal source mainly outputs analog waveform;Logical signal source output digital code shape.
Mixed signal sources can be divided into function signal generator and arbitrary waveform/function generator, wherein the function signal generator outputs standard waveform, such as sine wave, square wave, etc., and arbitrary wave/function generator outputs any waveform customized by users;The logic signal generator can be divided into pulse signal generator and code type generator, in which the pulse signal generator drives the square wave or pulse wave output of a small number, and the code type generator generates the digital code type of many channels.
For example, AFG3000 series produced by tektronix includes function signal generator, arbitrary waveform/function signal generator and pulse signal generator.
In addition, the signal source can also be classified according to the type of output signal, such as rf signal generator, scan signal generator, frequency synthesizer, noise signal generator, pulse signal generator and so on.The signal sources can also be classified according to the frequency band used. The signal sources of different frequency bands correspond to different application fields.