Here we offer you a quick explanation of cable conversion basics so that you learn a bit more about everything that goes on with a structured cabling job:
-Combining Composite/S-Video to Coaxial cable using and RF modulator
This modulator is capable of converting Composite or S-Video inputs into Coaxial output. The majority of RF modulators only output the video through channels 3 or 4, but there are some that allow you to pick a channel up to 125.
Composite and S-Video are limited as to how long the cables can be, but Coaxial cable is not, and it is a lot cheaper. If your TV just has one Coaxial input that is already being used, you can use an A/B switch to change between two different Coaxial wires.
-Splitting Composite signals
To split Coaxial wire is as easy as using a Y RCA splitter. To split an audio/video signal, you require three splitters: one for video- yellow-, one for the right audio- red-, and one for the left audio- white.
You lose some signal when you split Composite wire or when you run them a long distance.
-Splitting Coaxial signals for Cable/Antenna
This is also simple to do. You can get splitters that split in two, four, or more lines. The use of a splitter will break down the strength of the signal, so you may need a cable booster or amplifier.
-Splitting Coaxial signals for Satellite
This is a lot more complicated. You need a multiplexer to split a satellite signal.
One satellite dish can produce two, three, four, or even more coaxial outputs, each one with a different signal. You can even have several satellite dishes to get all the channels you want.
It will not work to simply split one of these wires for two different TVs. A multiplexer takes all the satellite wires and produces additional outputs. Its capacities are written as 2×4, meaning it converts two wires into 4, or 5×8, meaning it converts five into eight.
You have to make sure the multiplexer works for your service, for example, DirecTV or DishNetwork, and know that some inputs could be dedicated to a local channel antenna or for international satellites that may not be of your liking.
-Combining Analog TV signals over Coaxial cable
Coaxial cables can be combined under special conditions, for example, if you have a Coax feed from an RF modulator with a signal only on channel 3, and you also have an antenna/cable feed and there is no station on channel 3, you can combine the two Coaxial feeds into one through a Coaxial splitter backwards.
-Converting DVI, HDMI, and DisplayPort
This is easy to do and may be necessary if you are connecting a computer to a TV. You can do it with a standalone adapter or a wire that converts the signal.
Know that their capabilities are not the same, so, you are ruled by the lowest denominator, for example, HDMI and DisplayPort carry digital audio, but DVI doesn’t, and DisplayPort offers higher resolution and refresh rate.
-Converting VGA to Component
If you own a computer with a VGA output, and you want to connect it to a TV that has a Component input, you can use a converter.
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