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Wireline Data Transmission and Reception

 

Many types of wires are widely used to transmit data. Specifically, Category 3 and Category 5 (Cat3 and Cat5e, respectively)—also known as unshielded twisted pair or UTP lines—are now recommended for new telephone installations. Coaxial (coax) cables are used to distribute cable television (CATV) signals throughout a home. #12 and #14 American wire gauge (AWG) electric power distribution wire is also used for powerline communication applications such as Homeplug™. Because of the wide availability and comparatively low cost, these media can also be used for point-to-point communications and data transmission for remote applications. Each of these media types shares a common characteristic: for a given cable length, the high-frequency components of a given signal will be attenuated more than the low-frequency components. This application note describes a possible system architecture for transmitting a signal with high-frequency content, compensating for the frequency-dependent attenuation, and receiving this type of signal for further processing.