Good afternoon, install a 2 dvr dahua client of 16 ch, each with 10 cameras. With utp furukawa cat 5e cable and video balun. 10 cameras are inside, most feed them centrally from the DVR to no more than 20 meters, the rest feed them with individual sources. We also installed 10 cameras outdoors, all powered near each camera ... Well the point is that everything was perfect, without interference, without water, nothing ... Everything perfect. Until this Thursday that all the cameras suddenly have interference, some more, others less, in some almost not seen ... But others have a lot of totally annoying interference. Check the recordings of the disc, looking for the exact moment of the event, and it turns out that everything was fine, until the electricity was cut off, several times in a few minutes, and the employees went up the thermal at all times, and the electricity was cut again ... And from there the problem described. Lonqueén tried until now was to power the cameras from another phase of electricity, almost directly from the street line, only a thermal one in the middle, and the interference continues .. I put new sources and nothing. MY question is .. Will it be balun problems? I have not tried to change any but it is the only thing that occurs to me, that suddenly everyone starts to fail?

Take out a DVR and a camera and install it in your office and determine if there is something in the electrical network that interferes with you.

I had a similar problem where my Pyxyn brand sources did not answer me as I expected, there were 16 cameras in the day all good but at night, I fell too much, to the limit that there were cameras that turned off and on ... As we solve, we made all 18 cameras independent, since it was a XVR of 16 wired dahua and 2 IP, all with eliminators, from 12 volts to 1Ampers. After this everything went back to normal. When we checked the current output at the contacts, at night it reached 137 volts ... and the amperage fell too much .. I hope and I can serve you this comment, you can verify how much Amperage your camera is receiving ... Regards ..

Yes, the problem is that I tried new, individual sources, in different cameras, but it is exactly the same or worse. And the cameras were working perfectly day and night for 3 months, and from one minute to the other they all started with interference ... After 3 months, I explain?

I was thinking exactly if the problem could come from not being grounded .. And now that you tell me I will try it, thank you very much !! So I connect any 1.5 mm cable, is it ok? To the dvr chassis screw arranged for this purpose, the other end of the cable is connected to the ground of the outlet, with the dvr unplugged, then plugged in and I connect the balunes 1 to 1?

First check if the outlet has the corresponding ground. But you must place a javelin of at least a meter and a half and connect the land of the dvr there. Then you measure with a voltmeter between earth and neutral. If you have more than 2 volts, measure at the entrance of the power line, if the problem continues, you must make a complaint to the distribution company.

I have the same problem, I put the ground cable to the equipment and the power source and nothing and they are 4mp HDCVI cameras with punchable balum, 4hua 1080p dahua equipment compatible with 4mp and I don't know what else to do, change it until the wiring and the power source is 12V 20A and the distance from the farthest camera is 35mts

Hello, query, could you solve the problem? I ask because I have a similar problem, they contacted me to solve a problem with a lumix camera system, it is a 16-channel DVR, connected to a 1st floor UPS, the DVR has a PC-type power source, 3 of the power sources of the cameras are connected to the ups, when I arrived, only 10 cameras worked, the detail is that it is not my installation, 4 exteriors have interference, there were 3 interiors not working, I was checking the lines, there were 3 cameras connected to a source of 1 To which it was burned and connected in another place near the cameras on a 2nd floor, I replaced it with a 2A one, I got video again, the detail is that between 20 to 21 hrs until 8am those 3 recovered cameras and the 4 outer ones it takes an interference that almost impossible to see the images, at 8 am, the 3 interiors fully recover the signal and the 4 exteriors lose some interference, the images are visible, but equally annoying. I took out one of the cameras with interference, I took it to my office and it works normally, with that I ruled out that the camera was damaged. All cameras are connected with UTP cable and balum, the external cameras go with 1 utp cable for the 4 signals and another UTP cable with 12v of the source connected to the UPS. Obviously I changed the sources, all these wiring go inside the walls, in tubes other than those of 220v, the distance of the outer chambers does not exceed 60 meters and the 3 interiors do not exceed 40 meters

Ricardo tests to connect one of the cameras that has interference, directly to a source, without going through the cable. If that works well, you have a problem with the amperage or wiring distance

Hello, you want a definitive solution to me and what could be solved my recommendation is the following is an interference generated by a possible voltage leak to one of the cameras you disconnect from one until the interference is eliminated another possible problem is a source of bad quality! They generate horrible interference and the best solution is to use RG 59 with Siamese cable power with that holy cable remedy and goodbye to interference