Basic Functions

Basic Functions

Overview of Functions

VISCA commands form the basis of camera control.

Timing Chart

As VISCA Command processing can only be carried out once 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

 

 

 

 

 

 

 

 

 

 

ACK Completion

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Within 16.7msec (20msec*PAL)

Query Commands

 

 

Within 16.7msec (20msec*PAL)

RxD

Command

 

 

 

 

 

 

Completion

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16 Byte

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 series 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. 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 Initialization

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 is used 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.

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