MultiCam Boards Documentation > GRABLINK series Documentation > GRABLINK Full Handbook > Functional Specification > Exposure Control

Exposure Control

Grabber-Controlled Exposure

This board supports the following grabber-controlled exposure class of cameras:

Imaging

CamConfig

Camera operation class

AREA

PxxRG

Asynchronous progressive scan, grabber-controlled exposure

LINE

LxxxxRG

Grabber-controlled line-scanning, grabber controlled exposure

LINE

LxxxxRG2

Grabber-controlled line-scanning, grabber controlled exposure, dual signal

LINE

LxxxxRP

Grabber-controlled line-scanning, permanent exposure

TDI

LxxxxRP

Grabber-controlled line-scanning, permanent exposure

If the camera belongs to the grabber-controlled exposure class, you can specify the desired exposure time through parameters Expose_us and optionally ExposeTrim. This board provides an exposure time range of 1 µs up to 5 s.

The lower limit of the exposure time range is defined by the camera parameter ExposeMin_us. The upper limit of usable exposure time range is defined by the camera parameter ExposeMax_us.

Note. Both parameters prevent using the camera outside the permitted range.

The grabber controls the exposure time through the reset line and optionally —in case of LxxxxRG2 operation mode— through the auxiliary reset line.

Any of the four Camera Link upstream control line can be used for these purposes with independent polarity control. MultiCam selects automatically the exposure control line(s) according to the value of camera parameters CC<1,2,3,4>Usage; it configures automatically the polarity according to camera parameters ResetEdge and AuxResetEdge.

Uncontrolled Exposure

This board supports the following grabber-controlled exposure class of cameras:

Imaging

CamConfig

Camera operation class

AREA

PxxSC

Synchronous progressive scan, camera-controlled exposure

PxxRC

Asynchronous progressive scan, camera-controlled exposure

LINE

LxxxxSP

Free-running, permanent exposure

LxxxxSC

Free-running, camera-controlled exposure

LxxxxRC

Grabber-controlled line scanning, camera controlled exposure

If the camera belongs to the camera-controlled exposure class, you can specify the actual exposure time through parameter TrueExp_us. This board provides an exposure time range of 1 µs up to 20 s.