User`s manual

Basic Operation & Standard Features

BASLER A600f 3-9

DRAFT

Level Controlled Exposure Mode

When level controlled mode is selected, the length of the exposure will be determined by the

ExTrig signal alone. If the camera is set for rising edge triggering, exposure begins when the

ExTrig signal rises and continues until the ExTrig signal falls. If the camera is set for falling edge

triggering, exposure begins when the ExTrig signal falls and continues until the ExTrig signal

rises. Figure 3-5 illustrates level controlled exposure with the camera set for rising edge triggering.

Figure 3-5: Level Controlled Exposure with Rising Edge Triggering

Enabling the External Trigger Feature

To enable the external trigger feature:

• Set the On_Off field of the Trigger_Mode control register to 1 to enable triggering.

• Set the Trigger_Polarity field of the Trigger_Mode control register to 0 to select falling edge

triggering or 1 to select rising edge triggering.

• Set the Trigger_Mode field of the Trigger_Mode control register to 0 to select the program-

mable exposure mode or 1 to select the level controlled exposure mode.

• Set the Trigger_Source field in the Trigger_Mode control register to select which one of the

four physical input ports on the camera will be used to receive the external trigger signal:

- Set the Trigger_Source field to 0 to select physical input port 0 to receive the ExTrig signal.

- Set the Trigger_Source field to 1 to select physical input port 1 to receive the ExTrig signal.

- Set the Trigger_Source field to 2 to select physical input port 2 to receive the ExTrig signal.

- Set the Trigger_Source field to 3 to select physical input port 3 to receive the ExTrig signal.

The default setting is for physical input port 0 to receive the ExTrig signal. Refer to Sections 2.1.2

and 2.4.1 for a description of the physical and electrical characteristics of the physical input ports.

The Trigger_Source field in the Trigger_Mode register is defined in version 1.31 of the

IIDC specification.

Because the Trigger_Source feature is so new, the Basler BCAM 1394 Driver does not

yet include a method call to access this feature. As a work-around, you can use the

techniques described in the tutorial for the Basler Smart Features Framework Soft-

ware to directly read from or write to the Trigger_Source field. The Smart Features

Framework Software is available on the Basler web site. To download the software go

to:

http://www.baslerweb.com/popups/popup_en_1825.php

ExTrig

ExTrig Period

Exposure