Good day all. I hope someone can shed some light on this for me. I have a client who has done CCTV installation where they have installed ove 64 cameras. They are using Cat5e for all the cable runs and in some cases have 4 cameras running on one length of cat5e cable ( thats using 1 twisted pair per camera.) Now the problem they are having is that on a certain run where they have 4 cameras on the cat5e, 3 of the cameras out of the four were distorting, as if power interference. I.ve sent him cat5 ground loop isolators and this has somewhat cleared up the picture although he stilll has 5% of the top of each picture distorting. Strangely thouh this only happens when he plugs the cameras into the PC Based DVR but when pluged into a standard CRT/ CCTV monitor the picture is clear even with out the ground loop isolators. They'vetried re running new cable, changing the powers supplies and swopping the cameras around, but just on this cable run they have thsi problem of the distorted picture. What can be the problem and how can it be resolved. Any assistance will be very much appreciated.
Thank you....