What are the domestic and international EMC (electromagnetic compatibility) standards for endoscopic systems?

Endoscopic systems (including rigid endoscopes, flexible endoscopes, and camera units) must comply with GB 9706.1, YY 0505 (domestic), and IEC 60601-1-2 (international) EMC standards. Their unique characteristics lie in the inclusion of long cables (e.g., beam guides, video cables), high-frequency light sources (xenon lamps/LED drivers), and high-sensitivity CCD/CMOS image sensors. The standards require the system to be interference-resistant and maintain image stability when operating electrosurgical units (ESUs). The connection between the camera unit and the endoscope is a critical EMC point; the video signal cable must use shielded differential transmission, and a common-mode inductor (e.g., CMZ2012A-900T) and ESD protection (ESDLLC5V0D8BH) must be used at the interface. The switching power supply for the light source must be well shielded, and the output cable must be fitted with a ferrite core.