Baseband vs. Broadband


A baseband network is one in which the cable or other network medium can carry only a single signal at any one time. A broadband network, on the other hand, can carry multiple signals simultaneously, using a discrete part of the cable’s bandwidth for each signal. As an example of a broadband network, consider the cable television service you probably have in your home. Although only one cable runs to your TV, it supplies you with dozens of channels of programming at the same time. If you have more than one television connected to the cable service, the installer probably used a splitter (a coaxial fitting with one connector for the incoming signals and two connectors for outgoing signals) to run the single cable entering your house to two different rooms. The fact that the TVs can be
tuned to different programs at the same time while connected to the same cable proves that the cable is providing a separate signal for each channel at all times. A baseband network uses pulses applied directly to the network medium to create a single signal that carrie binary data in encoded form. Compared to broadband technologies, baseband networks span relatively short distances because they are subject to degradation caused by electrical
interference and other factors. The effective maximum length of a baseband network cable segment diminishes as its transmission rate increases. This is why local area networking protocols such as Ethernet have strict guidelines for cable installations


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