Recommendations For Controlling Exposure; In Free-Run Programmable Mode - Basler A202K Manual

3.2.2.1 Recommendations for Controlling Exposure

in Free-run Programmable Mode

When using the free-run programmable mode to control exposure, several general guidelines
must be followed:
• The minimum setting for Timer 1 is 6 µs.
• The minimum setting for Timer 2 is 35 µs.
• The actual length of the exposure time will be equal to the programmed time plus 94.5 µs.
• In free-run mode, the period of the internal control signal is equal to the sum of the Timer 1
setting plus the Timer 2 setting plus 94.5 µs. If the AOI and Binning features are not being
used, the sum of the Timer 1 setting plus the Timer 2 must be greater then 20.83 ms.
• If the AOI feature is being used, the sum of the Timer 1 setting plus the Timer 2 setting must
be greater than 1/Maximum Frame Rate where the maximum frame rate is determined by the
formula on page 3-25.
• If the binning feature is being used, the sum of the Timer 1 setting plus the Timer 2 setting
must be greater than 1/Maximum Frame Rate where the maximum frame rate is determined
by the formula on page 3-29.
If you are using the Exposure Tab on the Camera Configuration Tool to set up the
free-run programmable mode, the tool will ask you to enter a frame rate and an ex-
posure time. Once you have entered these numbers, the value for Timer 1 and Timer
2 will be automatically calculated and sent to the camera. If one of the guidelines
listed above is violated, red exclamation points will appear on the Exposure Tab.
When the camera is operating in free-run, external control of exposure start is not
possible. In free-run, the camera generates all control signals internally. The camera
determines when each exposure will start and controls the length of the exposure
time.
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BASLER A202
DRAFT
Operation and Features
3-11