binary signal

A binary signal is a fundamental concept in communications and computer science, representing information using only two states, typically symbolized as 0 and 1. This is known as the binary number system, which uses 0 and 1 as its digits, unlike the decimal system's ten digits.123

In digital computers and communication systems, these two states are easily represented by physical phenomena like "on-off" or "high-low" voltage. Each binary digit is called a bit, serving as the basic unit of information. Digital modulation techniques, such as frequency-shift keying (FSK), use different frequencies to transmit a 1 versus a 0, enabling the transmission of digital data over communication channels.314