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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
Command
RxD
TxD
Within
16.7msec(20msec*PAL)
Query Commands
16.7msec(20msec*PAL)
Within
Command
RxD
TxD
Basic Functions
In general
• Power On/Off
• I/F clear
• Address set
• ID Write
ACK Completion
• Mute
• Lens Initialize
• Comp Scan
Completion
16 Byte
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.
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.
VISCA is a protocol, which normally can support a
daisy chain of up to seven attached devices.
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.
Sets the camera ID.
Blanks the screen and sends out a synchronizing
signal.
Initializes the zoom and focus of the lens. Even when
power is already on, it initializes the zoom and the
focus.
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.
Basic Functions
6
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