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What is Bandwidth - Distinguish between Baseband and Broadband

The amount of data that can be transmitted through the transmission media within the given period of time is called Bandwidth. Different types of communication media (or channel) have different bandwidths. The bandwidth of analog signals is measured in Hertz (cycles per second). The bandwidth of digital signals is measured in bit per second (bps) or bytes per second.

Baseband
Baseband is a communication technique in which digital signals are directly transmitted over transmission line without changing into analog signals (i.e. without using modulation technique). The digital signals are commonly called Baseband signals.

Broadband
Broadband is a communication technique in which large amount of data (such as voice and video) is transmitted over long distance. The data is sent by modulating each signals onto different frequency. For this purpose, FDM (Frequency Division Multiplexing) technique is used, in which multiple signals can be transmitted at the same time.

Broadband is the bandwidth used for direct communication between very high-speed computer such as mainframe computer. This bandwidth includes microwaves, satellites, fiber optics media etc.

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