... : 2.8" TFT-LCD Tester with Monitor / PTZ Controller / Video signal generator STE-891 Application— CCTV system installation and maintenance ... testvideo signal test To test the electrical level range of video signal, abnormal signal is displayed.PTZ controllerCommunicationRS232, RS422 simplex ... more than 20 protocols such as PELCO-D/P, Samsung, Panasonic, Lilin, Yaan, etc.Baud Rate150,300,600,1200,2400, ...