NKTECH ST893 3.5" Inch LCD Monitor CCTV Camera Video PTZ RS485 UTP Tester Meter for On-site Installation and Maintenance of Video Monitoring System The NKTECH CCTV testerPRO is developed for the On-Site installation and maintenance of video monitoring system. It can be used for displaying video, controlling PTZ, generating images, capturing data of RS485 and testing LAN cable etc. Its functions, easy operation, and portability makes it simple for the CCTV technician to install and maintain CCTV system, improving work efficiency and get the labor cost down. Display the input video images. Pan/tilt the P/T unit and zoom in/ out the image. Setup the controlling parameters like protocol, communication port, baud rate, PTZ ID, pan/tilt speed; set and call preset position. Power the camera with DC12V (1A) power output from the tester. It is helpful for demo and testing where there is no power supply available. Data analysis. Captures and analyzes RS485 controlling data to help the technicians to find out the problem.