What issue may occur if the injected signal on a Digital Video Insertion System (DVIS) is too high or too low?

When the injected signal in a Digital Video Insertion System (DVIS) is too high or too low, it can lead to digital artifacts, which include issues such as video tiling and pixelation. These artifacts occur because the system is unable to process the digital signal correctly when it deviates from an optimal range. A signal that is too strong can overwhelm the system, causing distortions that affect the overall video quality. Conversely, a signal that is too weak may not provide sufficient data for proper video rendering, leading to similar artifacts.

The occurrence of video tiling is particularly notable as it results in a fragmented display where sections of the video appear broken or misaligned, while pixelation results in a loss of image clarity, making the picture appear blocky or blurry. Thus, maintaining the correct level of injected signal is crucial for the integrity and quality of the video output in a DVIS setup.