What does the term "ground loops" refer to in CCTV systems?

The term "ground loops" in CCTV systems specifically refers to electrical interference issues. Ground loops occur when there are multiple grounding points in a system that create a difference in voltage. This difference can lead to unwanted electrical currents circulating, which can interfere with the signals being transmitted by the CCTV cameras. This interference often manifests as noise or distortion in video images, potentially degrading the overall performance of the CCTV system. By understanding the nature of ground loops, technicians can take steps to minimize or eliminate this type of interference, ensuring clearer image quality and more reliable operation of the security system.