blue lines disturb in cctv image, not an interference

[gren_uk 0]

any idea what are those blue lines coming from the top to the bottom of the screen at timed intervals of 20-30 seconds?

the image is taken from a pci cctv card and seen on a laptop, the analog output to a cctv screen doesn't show them.

[ryeporta 0]

Not too sure .. but u can try:

 

1) Change the power supply of the Camera ..

2) Change the DVR Card ..

 

Also .. not sure if I got u correct .. but u are u r plugging the BNC into a PCI DVR Card in your PC .. and watching it on your laptop?? If yes .. then how does it look on your PC?

[gren_uk 0]

Below a sample image of a very old black and white camera pointed to the street, well this is the poorest result I achieved.. just as reference..

 

with a newer camera and shorter cable run you can do best.. anyway the image resolution of an analog camera is always CIF4 (400Kb +/-)