Maximum Allowed Line Acquisition Rate - Basler Racer User Manual

AW00118508000
6.4 Maximum Allowed
Line Acquisition Rate
The maximum allowed line acquisition rate for your camera is not static. It can vary depending on
how certain camera features are set. In general, the following factors can affect the maximum
allowed line rate:
The Camera Link pixel clock speed and the Camera Link tap geometry settings.

When the pixel clock speed is set to a high value, it will take less time to transfer captured im-
ages from the camera to the frame grabber in your host computer.
When the camera is set for a tap geometry that uses more taps (e.g., the 1X4 geometry uses
four taps and the 1X8 geometry uses eight taps), it can typically transfer data out of the camera
faster.
So if the camera is set for a high pixel clock speed and a high number of taps, it typically will
have a much higher maximum allowed line rate than when it is set for a low pixel clock speed
and a low number of taps.
Whether binning is enabled. Enabling horizontal binning may yield a significant increase in the

maximum allowed line 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.
The exposure time for acquired lines. If you use very long exposure times, you can acquire

fewer lines per second.
There are several ways that you can determine the maximum allowed acquisition line rate with your
current camera settings:
You can go to the Support section of the Basler website and use the online frame rate

calculator: www.baslerweb.com
You can use Basler pylon to read the value of the camera's ResultingLineRateAbs parameter

(see below).
You can use direct register access to read the value of the Resulting Line Period Raw register

(see below).
For more information about selectable Camera Link pixel clock speeds, see Section 8.1 on
page 100.
For more information about Camera Link tap geometries, see Section 7.2 on
Basler racer Camera Link
Acquisition Control
page 98.
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