1. Please connect the side of the camera's RS485 to the port of DVR's RS485 with cable. Please pay attention to the positive and negative.
2. Please go to Main Menu-->Advanced-->Device Inf to enable PTZ function.
3. Please go to the recording's setting to set up PTZ. For example, if the model of camera is C61H, the Protocol should be PELCO-D and Baudrate should be 2400