User`s manual

Image Acquisition Control
Basler aviator Camera Link 91
The Resulting Frame Rate Abs parameter takes all camera settings that can influence the frame
rate into account and indicates the maximum allowed frame rate given the current settings.
You can also use the Basler pylon Viewer application to easily read the parameter.
For more information about the pylon API and the pylon Viewer, see Section 4 on page 45.
Using Direct Register Access to Check the Maximum Allowed Rate
When using direct register access, you work with the "resulting frame period" rather than the frame
acquisition rate. Once the resulting frame period is known, the maximum allowed frame acquisition
rate can be determined by:
To determine the resulting frame period:
 Check the value of the Resulting Frame Period Raw register.
The Resulting Frame Period Raw register takes all of camera settings that can influence the frame
period into account and indicates the minimum allowed frame period given the current settings.
A value in a raw register is simply an integer value with no units. To determine what the actual frame
period will be, you must multiply the value in the raw register by the camera’s time base. The time
base on aviator cameras is 1 µs.
For example, if you read the Resulting Frame Period Raw register and find that its value is 10000,
the resulting frame period would be 10000 µs (10000 x 1 µs = 10000 µs).
5.7.1 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 sensor digitization feature set to one, consider changing the value to four. This
usually will greatly increase 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.
 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.
 The setting for the prelines feature can have an impact on the maximum allowed frame rate.
Lowering the setting for the prelines feature can increase the maximum allowed frame rate.
Max Frame Acquisition Rate
1
Resulting Frame Period in Seconds
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