Thank You for info, Grumpy _Mike. However, is it possible to make two separate lines, one for thereceiver antenna, and one for the transmitter, or another, possibly stupid idea, what if I pick up bluetooth signal on the camera and convert it on site (on the towed underwater construction) to plain video signal and then send it through video cable? I am sorry if I bother too much, but I need to resolve this problem and I do not know how. Thank again, Niksa.