© 2013 Thorlabs GmbH
4 Programming (SDK)
327
4.3.83 is_SetExternalTrigger
Syntax
INT is_SetExternalTrigger (HIDS hCam, INT nTriggerMode)
Description
Using is_SetExternalTrigger(), you can activate the trigger mode. If the camera is in standby mode, it quits
this mode and activates trigger mode.
In hardware trigger mode, image capture is delayed for each function call until the selected trigger event has
occurred.
In software trigger mode, an image is captured immediately when is_FreezeVideo() is called, or a
continuous triggered capture is started when is_CaptureVideo() is called. In hardware trigger mode, you
can use the is_ForceTrigger() command to trigger an image capture even if no electric signal is present.
When you disable the trigger functionality, you can query the signal level at the trigger input. This option causes the
camera to change to freerun mode.
For further information on the image capture modes of the DCx camera, see How to proceed: Image capture .
Input parameters
(Not supported by DCx Cameras)
(Not supported by DCx Cameras)
IS_SET_TRIGGER_HI_LO_SYNC
(Not supported by DCx Cameras)
IS_SET_TRIGGER_LO_HI_SYNC
(Not supported by DCx Cameras)
Call of is_FreezeVideo()
(single frame mode)
Call of is_CaptureVideo()
(continuous mode)
Returns the trigger mode setting
Returns the current signal level at the trigger input
IS_GET_SUPPORTED_TRIGGER_M
ODE
Returns the supported trigger modes
Return values
When used with
IS_GET_EXTERNALTRIGGER
Returns the current setting
When used with
IS_GET_TRIGGER_STATUS
Returns the current signal level at the trigger input
When used with
IS_GET_SUPPORTED_TRIGGER_MODE
Returns the supported modes linked by logical ORs
The function can not be executed in the current camera
operating mode (free run, trigger or standby).
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