Abnormal video signal: The video signal transmission process is that the image information is processed by the sensor and then converted into an electrical signal for transmission, and then the current or voltage signal is converted into a digital signal by an analog-to-digital converter, and finally imaged on the display screen. The essence of video signal transmission is electrical signal transmission, and the carrier of transmission is still a wire harness, which determines that video signal transmission cannot escape electromagnetic interference. During the transmission of the video signal, if it is subjected to electromagnetic interference, the amplitude and timing of the voltage or current signal are abnormal, the transmitted signal will be distorted, and the video signal will eventually be abnormal.
Abnormal control loop: The control loop of electronic equipment often executes different working states through changes in voltage or current. And the signal of the control loop is often more sensitive. The current or voltage of the control loop in the wiring harness is susceptible to electromagnetic interference during the coupling process, resulting in abnormal work.