Image Acquisition Control AW00123402000
144 Basler ace USB 3.0
6.10 Maximum Allowed Frame Rate
In general, the maximum allowed acquisition frame rate on any ace USB 3.0 camera can be limited
by these factors:
The exposure time for the acquisition of frames. If you use very long exposure times, you can
acquire fewer frames per second.
The amount of time it takes to read an acquired frame out of the imaging sensor and to prepare
it for transmission out of the camera. The amount of time varies with the height of the frame.
Frames with a smaller height take less time. The frame height is determined by the camera’s
ROI Height setting.
The amount of time it takes to transmit an acquired frame from the camera to your host PC.
The amount of time depends on the bandwidth assigned to the camera.
If the global reset release shutter mode on acA1920-25um/uc, acA2500-14um/uc,
acA3800-14um/uc, and acA4600-10uc cameras is selected, overlapped image acquisition is
not possible. This decreases the camera’s maximum allowed frame rate.
For more information about the global reset release shutter mode, see the "Global Reset
Release Mode" Section on page 116.
There are two ways for determining the maximum allowed acquisition frame rate with your current
camera settings:
You can use the online frame rate calculator found in the Support section of our website
(Support > Tools > Frame Rate Calculator):
www.baslerweb.com
You can use the Basler pylon API to read the value of the camera’s Resulting Frame Rate
parameter (see the next page).
For more information about Image ROI Height settings, see Section 8.5 on page 185.
When the camera's acquisition mode is set to single frame, the maximum possible
acquisition frame rate for a given ROI cannot be achieved. This is true because
the camera performs a complete internal setup cycle for each single frame and
because it cannot be operated with "overlapped" exposure.
To achieve the maximum possible acquisition frame rate, set the camera for the
continuous acquisition mode and use "overlapped" exposure.
For more information about overlapped exposure, see Section 6.7 on page 121.
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