Coupling 2 cat 6 cables for a balen run

[withoutfear]

I just installed a new 3 new odds in an over flow area! The first issue is I ran from an hdmi splitter to a ballen! The catch is my cat 6 ran short so I tried a coupler! I works up to the coupler but not after!the run is about 150'.would the coupler cause it to not work? Secondly, I had a camera running to a mothers room It was working fine, I cut it yesterday and added a powered splitter in the attic! To feed 3 tv's It worked fine yesterday but this morning it had some sort of interference running up all 3 tv's! You could see the picture it just had a rolling line every foot or so? Could it be the heat of the attic or a bad connection? I'm connecting the tv's with bnc to RCA adaptors?

[withoutfear]

LCD tv's not "odds"! sorry spell check got me again!!!!

[Borggren]

Not sure about the coupler issue, but if you have constant vertical lines rolling down your picture, then you have a ground loop problem.
Make sure that your splitter is on the same power line as your TV's.

[prochlea]

HDMI is pretty sensitive to length... even over balun runs. What is the length before the coupler and after the coupler? What resolution are you running?

[withoutfear]

Update: I ran a new cat 6 cable from the hdmi da splitter to the new lcd tv but to my surprise it still did not work. I'm at a loss of where to go from here.The length is under the 300 ft mark as specified in the balun's manual.On the hdmi splitter (Fed by a kramer switcher) all the correct lights are lit showing the signal is infact going out to the tv juzt not getting there for some reason!( on my particular hdmi DA if something is wrong with any connection it will make all the unit's lights blink and my two sanctuary projectors will blink and act crazy which they are not. Ideas?
Also on my BnC splitter I managed to trouble shoot the scrolling issue to one cable, when i plug it in to the splitter it freaks everything out if i disconnect it the other two tv's work fine. I will try and reterminate it in the morning! Hopefully it's that easy as this project is now becoming a thorn in my side!!!
Cheers

[Brad Weber]

Originally Posted by withoutfear

The length is under the 300 ft mark as specified in the balun's manual.

Can you identify the specific products? The total run length may be from transmitter to receiver so you'd have to include both the run from transmitter to splitter and from there to the receiver (you may even have to count the splitter as being equivalent to some additional run distance). IN addition, the run length supported typically varies with the bandwidth of the signal, higher bandwidth means greater losses and thus shorter runs supported. Some video over UTP products seem to spec being compatible for higher resolutions but then also claim distances that are based on lower resolutions, so be sure you are looking at the run length for the resolution and scan rate involved and not possibly for a lower resolution. And many times the distances specified for video over UTP products are identified as "up to", meaning that is more a maximum distance you may not actually get that much distance under normal circumstances.