I am connecting a second tv to me home theater(kitchen/bar area) and I was told I could connect it to the cable running to the projector. This way, I would only have about 10ft of cable needed to run to the second tv and they both would be connected to the receiver. Pros? Cons?
What about a distribution amp? I was originally going to run everything out of my receiver but then I would need to have my receiver on. What if I ran each component to the distribution amp and then out to the receiver and out to the second tv? Then again this is probably a pricey setup. Any thoughts?
You can not properly split analog video using a Y adapter. These things may make a picture but they are junk if they do not contain an active video amplifier capable of driving two or more loads.
Video is usually sent using a sending end source impedance of 75 ohms over 75 ohm cables to a receiving device that terminates the signal in 75 ohms. If this is done all of the signal energy transmitted is absorbed by the receiving 75 ohm load. If the receiving impedance is not 75 ohms some of the signal energy is not absorbed but is instead reflected as a wave traveling back toward the sending end. If the sending end impedance is 75 ohms the reflected energy is absorbed at the sending end and all is OK. If the sending end impedance is also not 75 ohms some of the energy traveling back to the source is reflected again as a wave now traveling toward the load which appears as a ghost in the picture. The distance on the screen between the main image edges and the ghost edges is a function of the length of the coaxial cable and thus signal propagation delay in the cable.
Splitting the signal using a Y adapter results in the source being terminated in 75/2 or 37.5 ohms at the Y which reduces the signal level to 2/3 of normal and causes significant energy to be reflected back to the source. If the signal is properly terminated at the source and both receiving ends you will get a dark picture that otherwise looks OK but any differences between the impedance of the cables and the terminating impedance will cause reflections that bounce back to the Y where there is a major impedance miss-match which will cause signal energy to reflect back toward the receiving device.
Splitting an analog video signal (composite or component) is properly done by using an active amplifier with a 75 ohm input termination and a gain of two with a very low output impedance feeding two or more 75 ohm source terminating resistors. This results in no signal level loss and isolation between the signals feeding the down stream devices. That is how professional equipment works.
That would be the case only if you are using the energy from the amplifier output as a reference point instead of the energy being sent on the coaxial cable.
No, not at all.
It's a simple series circuit. The source resistor is in series with the output, it forms a voltage divider with the load resistor, resulting in half the voltage across the load and half across the source resistor.