What is a characteristic of digital control systems?

The characteristic that defines digital control systems is their ability to provide discrete signals. Digital control systems operate on data that is represented in discrete form, meaning that they process signals that exist at specific intervals rather than continuously. This characteristic is fundamental to how digital systems function, as they typically convert continuous signals into a digital format through processes such as sampling and quantization.

In contrast, analog systems work with continuous signals that change fluidly over time. Digital systems, by working with discrete values, allow for more precise control, easier storage, and manipulation of data. They also enable the use of advanced algorithms for control and monitoring, benefiting applications that require high levels of precision and repeatability.

The other options highlight distinctive features of analog systems or address aspects not unique to digital systems. For example, analog systems inherently deal with continuous signals, and while maintenance requirements can vary, the complexity of digital systems does not necessarily lead to more maintenance than analog systems.