26-10-2010, 12:22 PM
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Internet Access via Cable TV
Changes in the Cable Network
The cable network was designed to deliver TV signals in one direction from the Head-End to the subscribers homes
To provide TV services Cable Operators had to recreate a portion of the over-the-air radio frequency (RF) spectrum within a sealed coaxial cable line
Operators had to upgrade the cable network so that signals could flow in both directions
Cable Operators assign a spectrum of signal frequencies to the cable network
One spectrum is used for the signals that move from the Head-End towards the cable subscriber
Another spectrum of signal frequencies are used for the signals that move from the cable subscriber towards the Head-End
By replacing existing one way amplifiers with two way amplifiers Cable Operators are able to separate the upstream and downstream signals and amplify each direction separately in the right frequency range
Internet Access via Cable TV
Changes in the Cable Network
The cable network was designed to deliver TV signals in one direction from the Head-End to the subscribers homes
To provide TV services Cable Operators had to recreate a portion of the over-the-air radio frequency (RF) spectrum within a sealed coaxial cable line
Operators had to upgrade the cable network so that signals could flow in both directions
Cable Operators assign a spectrum of signal frequencies to the cable network
One spectrum is used for the signals that move from the Head-End towards the cable subscriber
Another spectrum of signal frequencies are used for the signals that move from the cable subscriber towards the Head-End
By replacing existing one way amplifiers with two way amplifiers Cable Operators are able to separate the upstream and downstream signals and amplify each direction separately in the right frequency range
