sistemasjg

Today I just finished a 13 cam new job, just for test I plug 4 cameras (singe dome, non IR) on one 1A wall wart. All perfect, no problems at all. The same cable brand, the same baluns, just the cameras are different, but are cheap 12v Chinese common ground too. Finally for the 13 cameras, I installed 5 warts, for safe. Yes I've read about Altronix a lot in this forum, but unfortunately nobody sells this brand here. No to mention that here the dollar exchange is in control by the government , so is a real PITA to get US$ for imports.

That´s what I call a quick and complete answer I´ve been using this http://www.bikudo.com/photo_stock/4000.jpg and this http://rygelcomputer.com/images/balun3.bmp but never think on using the ones with the tails, I just asking my provider to ship the tails ones. A great idea too, perfect for the 4in1 balun Yes, that is true, but you know, chances are than someone comes and see the cables hanging and criticize, making the customer think if there are other ways of doing it. Another thing is driving me crazy is, what is the maximum distance two cameras must be separated to use just one cat5e cable, I mean, using one pair for video on camera A, other pair for video for camera B and, one pair for power + and the other for power -? In the condo job, I use 1 cable for each floor, 2 cameras per floor. One at the elevator exit and the other in the emergency stairs. The cable comes from a duct in the middle of the floor and then split for each camera. This two cameras shares a 1A 12v power wart. The image in the security office at lobby are crystal clear for each floor. The distance from the power supply and each camera is quite different but here is no problem with wavy images, no ground loop. In other installation, I tried to do the same thing, even the cameras are more close to each others, about 1 or 2 meters, and it was a complete disaster, all cameras have interference. I rerun just 1 cable for each one and the problem disappear. Then, just for testing, I tried to share power for two cameras close to each other and the problem rise again. What I want to avoid is to have 16 power supplies inside of a box or hanging. This work is done after a shop makeover or remodelation, and the previous cctv installation using coaxial and the same 16 cameras were using just 4 1A 12V power supplies. Thanks for you quick answer and I hope no to be too long in my post

Hi, after about 2 years doing maintenance for some cctv installations I´m just begin installing cctv systems from the beginning. I´ve finalized a 36 cams system for a big condo and other 2 installations of 16 cams each one in a chain of stores. The experience has been cool and nice. But the problem or what I don´t like is the cable mess at dvr end, I mean, all cables coming from cameras and the power adapters (I´ve to use them because here nobody sells independent isolated power supplies and all the cameras are the cheap 12v common ground ones). I´ve tried putting all inside a 40x30cm metal box but the Geovision card cables are too short to get inside the box. So, my questions to you are: How do you terminate nicely yours installations at DVR/Geovision side? Ps. Im using cat5e cable with baluns, running one cable for each camera. Thanx in advance and excuse my english. I´m from Venezuela