When these interferences or chromatic aberrations can be seen in the image, they can be caused by several cases that only occur in analog cameras and not in IP cameras.
- Wiring close to power cables, reactances or large electro-magnetic sources.
- Noise in the electrical network entering through the power supply to the equipment.
- The use of shielded UTP cable, not carrying the shield to ground.
- There are probably more reasons but less common.
- Separate power supplies.
- Use switched-mode power supplies, connected to ground.
- Increase the voltage to 12,3V
- Increase Amperage
- Separate CCTV cabling from other electrical cables.
- Connect UTP shielding to ground.
- Connect recorder chassis to ground.
- Use active or passive balum filters (transceivers) like this one:
- Use ferrite filters on video and power supply.