© 2013 Thorlabs GmbH338
DCx Cameras
4.3.90 is_SetOptimalCameraTiming
Syntax
INT is_SetOptimalCameraTiming (HIDS hCam, INT Mode, INT Timeout,
INT* pMaxPxlClk, double* pMaxFrameRate)
Description
Using is_SetOptimalCameraTiming(), you can determine the highest possible pixel clock frequency for the
current configuration. This function sets the pixel clock for which no transfer errors will occur during the Timeout
period. Moreover, it returns the highest frame rate available for this pixel clock frequency.
is_SetOptimalCameraTiming() can only be executed in free-run mode (is_CaptureVideo() ). If the
return value is IS_SUCCESS, no clock setting will be made.
Attention
The function should be executed in a separate thread and run in the background to allow for the computational
load caused by additional color conversions, etc. Otherwise, it will not be able to return the optimum values.
Changes to the image geometry or pixel clock affect the value ranges of the frame rate and exposure time. After
executing is_SetOptimalCameraTiming(), calling the following functions is recommended in order to keep
the defined camera settings:
is_SetFrameRate()
is_Exposure()
If you are using the DCx Camera's flash function: is_IO()
Input parameters
The function makes one attempt to determine the
optimum pixel clock and returns immediately.
Sets the period (in milliseconds) during which no
transfer error may occur. The adjustable range is
between 4 and 20 seconds. The higher the value you set
for this parameter, the more stable the determined pixel
clock value will be. This, in turn, increases the runtime of
the function correspondingly.
Returns the maximum pixel clock frequency (in MHz).
Returns the maximum frame rate (in fps).
Return values
This setting cannot be changed while automatic exposure time
control is enabled.
Invalid image size
This value is returned if e.g. the function is called with active binning
or subsampling
Camera is in standby mode, function not allowed
One of the submitted parameters is outside the valid range or is not
supported for this sensor or is not available in this mode.
The camera model used here does not support this function or
setting.
The function cannot be used because the camera is waiting for a
trigger signal.
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