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dave camera guy

cabling question

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Hello, I am a new member here and have a question hopefully someone here can help me with. I have a Bosch REG-71 license plate capture camera at an entrance to a casino that is giving me some video issues. 80% of the distance is on single mode fiber with video transceivers converting it to UTP the remaining 300 feet. I have what seems to be a grounding issue. The infared shot and the overall shot have a picture but i'm getting rolling bars from left to right causing the pelco endura to reject the recording. I originally had un-shielded cat5 in conduit to the transceivers. I have tried replacing the cable with shielded cable and bonded one side with no change in the picture. Will coax be a better solution? I am trying to avoid pulling fiber all the way to the camera. I have also tried powering it at the camera via transformer. The only way I have gotten a good picture is by bypassing the underground copper and laying temp lines on the ground as a test. Can anyone help?

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Thanks for the reply. I have not. Do you recommend an isolator that works with UTP? The Bosch camera I am dealing with has a cat5 pig tail for each camera. I suppose that I could add a balun on each side of the isolator but it just seems like overkill. Any thoughts?

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So....cameras cat5 pigtain to a balun, then add a barrel and attach female end of isolator, then another balun back to field cat5? I guess its worth a try, assuming I can cram it all into my junction box. I'll let you know how it works. Thanks again.

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