video ghousting

[heavychecy1/2 0]

hello all this is my first post to the forum but hopefully not my last. i currrently have a 22 camera install on my hands which is not complete and every place i have called is stumped.we are working at a storage facility where eleven of the cameras are run through siamese cable (rg59/18/2) we are using a mixture of dome and bullet style cameras. these are all installed on the main building as we call it, and the picture is crystal clear just what we like to see. in contrast the other eleven cameras mounted outside of the main building are not clear at all. o i forgot to mention any cameras mounted to metal are insulated with a slab of trex decking to prevent interference. they display ghosting of other camera images and tv lines running through them basically unacceptable to any customer. in this portion of the facility there are three building with either three or four cameras per building. these lines are a bit farther away from the head end all under five hundred feet. but conversely they are ran underground and with cat5e and video baluns. the cameras power is ran from a power supply per storage building. the video baluns are passive they are supposed to go much more than five hundred feet. we bought and installed active or powered video baluns to rectify the problem and the picture got worse almost as if the signal was to hot. we installed a ground loop isolator on the video side of the camera it cleared the image up but not totally.we noticed the where we ran our lines underground in one spot a massive power line runs parallel! so we shut down the main breaker to the entire power of the storage units and ran a gas powered generator to isolate the power supply and problem still existed. we ran direct dc 12 volt (whioch is what all 22 of our cameras are running on) from our van to the cameras didnt fix the issue. while troubleshooting we noticed that the pictures from the cameras that were the farthest away from the head end were the clearest. we guessed that the longer distance was giving the lines more time to drain off the static entering our video stream. our last dilemma we faced was we powered up a camera (first off of a generator then off the main buildings power) and put two passive baluns on a three hundred foot legnth of cat6. we ran our camcorder to view the video coming out of the security camera and as soon as the wire was set on the ground two areas of rolling distorted lines appeared. now this happened in the parking lot where the lines were ran underground and the lobby of the main building and the front lawn near the main buiolding. this leads us to believe that there is some massive magnetic field or iron ore in the fill underneath the entire facility. we have no way of determining this and are looking for any ideas or possibilities that you may have. again thank you to anyone has has even the slightest suggestion

[the toss 0]

the cameras power is ran from a power supply per storage building.

 

Have a look at your earth path - earth 1 -power supply 1 - camera 1 - cat 5e to DVR - DVR power supply 2 - earth 2

 

 

 

we guessed that the longer distance was giving the lines more time to drain off the static entering our video stream.

 

It is not the case that interference will decrease with length of cable. Interference does not "bleed" off but superimposes itself on the signal.