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From the perspective of a signal and system, information is generally transmitted in the form of sine waves.
Analog signal: The signal is a continuous function signal in the time domain, and it is also the ubiquitous signal around you.
Digital signal: A digital signal is a digital representation of a discrete-time signal, which is usually obtained from an analog signal.
The most basic signal is a sine wave.
But under many circumstances, all kinds of signals are widely utilized in different occasions, for instance, square waves are often used in digital systems or voltage control, modulated signals and noise are used in communication systems, pulse signals are used in radar systems, and arbitrary waveforms are for a variety of different applications.
Signal generators that combine sine, square and triangular output signals are called function generators.
GW Instek has an extensive signal generator products for you to choose from, including function generator, AM/FM signal generator, audio generator and RF signal generator, function signal generators can be divided into two categories: DDS function generators and analog function generators.