(TST-085 Video Surveillance Tester (Engineering Treasure) is a special instrument used for debugging and fault detection of video security surveillance engineering projects. This product incorporates functions such as camera detection, PTZ control, data cable testing, color bar generator and control protocol analysis. The product adopts an integrated design, and comprehensive and important functions are integrated into a compact handheld instrument. It has the attributes of easy portability, simple operation, and intuitive display, which can greatly save engineering time.)