What is a primary characteristic of a digital signal?

A primary characteristic of a digital signal is that it consists of discrete levels, usually representing binary values of 0s and 1s. This fundamental property distinguishes digital signals from analog signals, which are characterized by continuous levels that can take on a range of values.

Digital signals are used extensively in modern electronics because they are less susceptible to noise and degradation over long distances compared to analog signals. The binary nature (the two discrete states) allows for straightforward representation and manipulation by digital devices, enabling efficient data processing and transmission.

In contrast to digital signals, continuous levels representing analog data, variable amplitude dependent on input voltage, and high-frequency oscillation characteristics pertain to different aspects of signal processing and transmission that are not characteristic of a digital signal.