dahua ghost image
- Thread starter ali.waqar
- Start date
alastairstevenson
Staff member
Is the camera looking through a window?
its look but this is not in window i have 21 camera all are the same
bigredfish
Known around here
I just noticed those are analog CVI cams. The camera and XVR are not likely the source of the problem.
It’s almost certainly from the cabling or baluns.
How did you wire them? Cat5 with baluns or RG59?
If baluns, show a picture of the balun with wires connected.
Are the cables running parallel to mains power cable within say 12-18 inches?
Distance of cabling from XVR to camera?
It’s almost certainly from the cabling or baluns.
How did you wire them? Cat5 with baluns or RG59?
If baluns, show a picture of the balun with wires connected.
Are the cables running parallel to mains power cable within say 12-18 inches?
Distance of cabling from XVR to camera?
guykuo
Getting comfortable
I agree with Bigredfish. This looks like a signal reflection within an analog signal wire. Reflections are usually due to an impedance mismatch. Could be camera wiring or cable to display monitor.
If ghosting is only on camera feeds, then the camera cabling is suspect.
If ghosting also appears on the NVR GUI elements, then I would suspect a long cable run between NVR and display monitor.
If ghosting is only on camera feeds, then the camera cabling is suspect.
If ghosting also appears on the NVR GUI elements, then I would suspect a long cable run between NVR and display monitor.
bigredfish
Known around here
As I re-read this thread, he says all 21 cameras are the same. The same ghosting?
Then yeah I'd check the cabling between the NVR and monitor. How far is the monitor from the NVR?
Then yeah I'd check the cabling between the NVR and monitor. How far is the monitor from the NVR?