User`s manual

Image Acquisition Control AW00104701000
144 Basler scout light GigE
9.12 Maximum Allowed Acquisition Frame
Rate
In general, the maximum allowed acquisition frame rate can be limited by three factors:
 The amount of time it takes to read an acquired frame out of the imaging sensor and into the
camera’s frame buffer. This time varies depending on the height of the frame. Frames with a
smaller height take less time to read out of the sensor. The frame height is determined by the
camera’s AOI Height settings.
 The exposure time for acquired frames. If you use very long exposure times, you can acquire
fewer frames per second.
 The amount of time that it takes to transmit an acquired frame from the camera to your host
PC. The amount of time needed to transmit a frame depends on the bandwidth assigned to the
camera.
To determine the maximum allowed acquisition frame rate with your current camera settings, you
can read the value of the camera’s Resulting Frame Rate parameter. This parameter indicates the
camera’s current maximum allowed frame rate taking the AOI, exposure time, and bandwidth
settings into account.
For more information about the acquisition mode, see Section 9.2 on page 85 and Section 9.3 on
page 89.
For more information about AOI Height settings, see Section 11.6 on page 185.
For more information about the Resulting Frame Rate parameter, see Section 5.1 on page 39.
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 first use the three formulas described below
to determine which factor is restricting the maximum frame rate the most. Next, you must try to
make that factor less restrictive:
 You will often find that the sensor readout time is most restrictive factor. Decreasing the AOI
height for the acquired frames will decrease the sensor readout time and will make this factor
less restrictive.
 If you are using normal exposure times and you are using the camera at it’s maximum
resolution, your exposure time will not normally be the most restrictive factor on the frame rate.
However, if you are using long exposure times or small areas of interest, it is quite possible to
When the camera’s acquisition mode is set to single frame, the maximum possible
acquisition frame rate for a given AOI cannot be achieved. To achieve the
maximum possible acquisition frame rate, set the camera for the continuous
acquisition mode.