Cable TV Functionality
Back in the early days of television, there was no debate about which service to go with or who had more channels. That's because there were only four, and they were broadcast through the air to each individual TV.
The problem with this, though, was that only people within the area of the broadcasting antenna could pick up the signal. People in remote areas could not. Enter cable television, which solved a lot, but not all of those issues.
For the most part, cable TV functionality is the same today as it was when it first began, in that a cable is run from the antenna into your home and to your television as opposed to your television picking up the signal from the air.
Early cable setups functioned by simply using an antenna to capture the over-the-air microwave broadcasts and sent them via wire to individual television sets in people's homes. That allowed people that could not receive the broadcast to still receive the signal. The problem was that as cables became longer, signals became distorted, so amplifiers were added to each cable line to fix the problem. This became known as Community Antenna Television, or CATV.
That worked for a while, until satellite technology came along. Multiple channels and packages could be transmitted to your local cable company via satellite rather than microwaves, allowing the consumer access to more channels than they could have imagined.
Cable was continually improved in the years to come to provide what you see today. There were still problems with interference, so cable companies opted to improve the cable that was used for signal transmission. That led to the birth of the fiber optic cable, which reached more homes using a single cable and an updated compression called MPEG, which allowed for an even higher bandwidth and thus, more channels.
That's the system that is in place today, a fiber-optic infrastructure pumping 1,000 channels to many, many American homes, a lot of those channels in high definition. That's quite a few more than the four people were watching in the 1950's. Cable will continue to be improved, especially as it battles Satellite for television programming dominance, but for the most part, the idea behind today's cable TV functionality isn't incredibly different from what it was decades ago.
