Before, cable television held the name Community Antenna Television or CATV. Community Antenna Television, in its technical sense, is a system that allows users to gain access to television programs by way of frequency signals that are transmitted to TV sets through coaxial cables or digital light pulses. CATV works in much the same way as the over the air method, which utilized television antenna in order to broadcast television. The difference, however, is that cable television utilized cables rather than airwaves in order to send signals.
It was in the valleys of Pennsylvania where cable TV was born. During those times, the only people who had TV sets were those who lived on higher ground, or those who were close to the source of the program. This is because television signals back then were actually transmitted over radio frequencies that only travel in straight lines. What the people who lived in the valleys of Pennsylvania did was that they came up with a creative solution to their viewing woes. They cleverly set up antennas on the high spots and the tallest hills around them, and they run cables down to their homes so that they could receive the signals clearly.
But then again, running cables worked well only within short distance and the signals sent through those cables were subject to interference. The sad fact was that the longer the cable and the farther the signal had to travel, the weaker it became. Consequently, a pretty distorted image was produced. What they did to remedy this problem was that they installed a series of amplifiers along the way. By putting up one amplifier in every one thousand feet distance, the strength of the signal increased and, in turn, the video quality improved.
Today, the modern cable TV makes use of the fiber-optic cable which is unlike the earlier coaxial cable that is subject to interference. Also, MPEG compression, which converts the signal from analog to digital, as well as internet TV were developed.
You have just read why we can now watch cable TV on the internet.
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