Good day folks. Having installed, or at least dealt with, a modest amount of cameras as part of my current job, I came across one aspect which seems to divide us in two schools of thought: those who suggest that a single PSU run ALL cameras and those who suggest that each camera have its individual power brick. For now, we went with the second option for all our installs, which is messier and takes longer to set up, but offers better redundancy, since if one brick were to fail, the rest would still remain up, whereas with a single supply....well, if it fails, ALL cameras go out. A single supply would be easier to swap out though, because you can just have a busbar where the cameras are connected and then connect that to the PSU.
Aside from that (and possible financial aspects), the main point was picture quality/distortion. One chap suggested having a single PSU run all cameras impacts quality and causes noise on the image, though I haven't tested or witnessed this myself to confirm. He invoked some sort of "impedance mismatch", to replicate his words exactly, but we haven't gone in depth here.
So, any thoughts on this ? Both from personal experience of CCTV guys out there and from an electrical perspective ? Cheers guys.
Aside from that (and possible financial aspects), the main point was picture quality/distortion. One chap suggested having a single PSU run all cameras impacts quality and causes noise on the image, though I haven't tested or witnessed this myself to confirm. He invoked some sort of "impedance mismatch", to replicate his words exactly, but we haven't gone in depth here.
So, any thoughts on this ? Both from personal experience of CCTV guys out there and from an electrical perspective ? Cheers guys.
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