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Blog image VIKASH RANJAN Shared publicly - Apr 7 2020 6:54PM

mca 4 broadband and baseband

Broadband versus Baseband

Broadband     A communication medium that carry a wide range of signal frequencies from audio to video frequencies.In telecommunications broadband medium can be made to carry many signals at once by using total bandwidth into many independent channel, each of which carries only a specific range of frequencies.

In contrast, a BASEBAND can carry only a single channel. ATM, and Cable TV are all broadband media, while standard ISDN barely qualifies.

 Broadband characteristics are:

• Digital signal modulated onto RF carrier (analog)

• Channel allocation based on FD M

• Head-End for bidirectional transmission

• Stations connected via RF modems, Le. radio modems accomplish the digital-to-analog conversion process, providing the transmitting device access to an analog channel.


Data, voice and video can be accommodated on broadband channel

• Greater distances

• Greater bandwidth.


• Cable design

• Alignment and maintenance

• High cost, requires modems

• Lack of well-developed standards.

Baseband is single channel, supporting a single communication at a time . They are digital in nature. Total bandwidth of I to 100Mbps is provided over coaxial cable, UTP, STP, or fiber optic cable. Distance limitations depend on the medium employed and the specifics of the LAN protocol. Baseband physical topologies including ring, bus, tree, and star.

 The characteristics of this system may be summarized as follows:

• Unmodulated digital signal

• Single channel

• Bidirectional propagation of signal

• Stations connected, via T connectors

• No need of modems - low cost installation.


• Simplicity

• Low cost

• Ease of installation and maintenance

• High rates.


• Limited distances

• Data and voice only.

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