Types of Transmission

Data transmission can happen in different ways (analog or digital), can use different controlling schemes (synchronous or asynchronous), and can use either one sole channel over a wire (baseband) or several different channels over one wire (broadband). These transmission types and their characteristics are described in the following sections.

Analog and Digital

Would you like your signals wavy or square?

Analog transmission signals are continuously varying electromagnetic waves that can be carried over air, water, twisted-pair cable, coaxial cable, or fiber-optic cable. Through a process of modulation, data are combined with a carrier signal of a specific frequency. The modulation of a signal differs in amplitude (height ...

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