karatron

Hi I have the following problem in a video distribution installation. I am sending RGB video over utp ( Cat7 STP to be exact) with a krammer (pico tools) tranceiver. It is like 90 meters away the display from the source. At the display I can see what we call ... cascade shadows ... in the image, which is making the image blurry any suggestion on how to eliminate this problem?? thanks in advance for your time