User`s manual

AW00098504000 Image Acquisition Control
Basler ace Camera Link 119
7.8.1 Increasing the Maximum Allowed Frame Rate
You may find that you would like to acquire frames at a rate higher than the maximum allowed with
the camera’s current settings. In this case, you must adjust one or more of the factors that can
influence the maximum allowed rate and then check to see if the maximum allowed rate has
increased:
 If you have the Camera Link pixel clock speed on your camera set to a low value, consider
setting it to a higher value. Be aware, however, that some frame grabbers cannot handle
higher pixel clock speeds. Before you increase the setting for the camera’s pixel clock, make
sure that your frame grabber is compatible with the higher setting.
 If you are using a Camera Link configuration with a low number of taps, consider using a
configuration with a higher number.
 If you have the sensor bit depth set to 12 bits, consider changing the value to 10 bits. This will
typically yield a significant increase in the maximum allowed frame rate.
 Decreasing the height of the AOI can have a significant impact on the maximum allowed frame
rate. If possible in your application, decrease the height of the AOI.
Decreasing the width of the AOI can also yield a significant increase in the maximum allowed
frame rate, but this is only true when the width is lowered in increments of 50% of the sensor
width (e.g., from 2048 to 1024 or from 1024 to 512).
 If possible in your application, enable either horizontal or vertical binning (or both). This may
yield a significant increase in the maximum allowed frame rate, but this will only be true if the
camera is not already reading out image data at a rate that is near to the current data carrying
capacity of the Camera Link interface.
 If you are using normal exposure times and you are using the camera at it’s maximum
resolution, your exposure time will not normally restrict the frame rate. However, if you are
using long exposure times or a small area of interest, it is possible that your exposure time is
limiting the maximum allowed frame rate. If you are using a long exposure time or a small AOI,
try using a shorter exposure time and see if the maximum allowed frame rate increases. (You
may need to compensate for a shorter exposure time by using a brighter light source or
increasing the opening of your lens aperture.)
Decreasing the sensor bit depth, decreasing the AOI height, decreasing the AOI
width, and enabling binning can each result in an increase in the maximum
allowed frame rate because they decrease the time that it takes to read out pixel
data from the imaging sensor. But in order to actually see an increase in the
maximum allowed frame rate, you must have the pixel clock speed and the
number of taps set high enough so that the Camera Link interface can transfer the
larger amount of image data that will be generated when the camera is operated
at a higher frame rate.
If you decrease the bit depth, decrease the AOI Height, decrease the AOI Width,
or enable binning and you have the pixel clock speed and the number of taps set
to low values, you will see no increase in the maximum allowed frame rate.