jladvisory

Hi Guys, I am new in this forum. I am installing a cctv system at home and results that when I connect the TV to the DVR the signal is poor. I am using a VGA to RJ45 converter in both sides and a CAT5e cable. I am thinking in using the BNC output of the DVR with video baluns and a RCA converter to reach the television. What would you recommend? I have been trying and trying with differents cables and differents RJ45 connections but nothing.