Sony FCBEX490DP User Manual (FCB-490D_Technical_Manual) - Page 6

Basic Functions Basic Functions Overview of Functions VISCA commands are the basis of camera control. Timing Chart As VISCA Command processing can only be carried out one time in a Vertical cycle, it takes the maximum 1V cycle time for an ACK/Completion to be returned. If the Command ACK/Completion communication time can be cut shorter than the1V cycle time, then every 1V cycle can receive a Command. General Commands Within Query Commands Within 16 Byte In general • Power On/Off Powers the camera on and off. When the power is off, the camera is able to accept only the lowest level of VISCA Commands; the display and other features are turned off. • I/F clear Clears the Command buffer of the FCB camera. Clearing the buffer can also be carried out from the control application software when the power is on. • Address set VISCA is a protocol, which normally can support a daisy chain of up to seven attached devices. In this case, if addresses from 1 to 7 are assigned to each of 7 devices, you can control seven cameras with the same personal computer. However, the FCB camera does not support connection of cameras in a daisy chain. Therefore, whenever a camera is connected for the first time, be sure to use the address set to confirm the address. • ID Write Sets the camera ID. • Mute Blanks the screen and sends out a synchronizing signal. • Lens Initialize Initializes the zoom and focus of the lens. Even when power is already on, it initializes the zoom and the focus. • Comp Scan A pixel blemish-masking feature, which can be made to reevaluate overall CCD pixel blemishes and mask severely flawed pixels automatically upon receiving the COMP SCAN command. This feature helps to mask the flaws found in CCD imagers, even after the camera has been powered on for some time. 6