Recommendations For Controlling Exposure; In Exsync Level-Controlled Mode - Basler A202K Manual

Operation and Features
You can set the camera to operate in one of the ExSync controlled exposure modes using either
the Camera Configuration Tool (see Section 4.1 and the configuration tool's on-line help) or binary
commands (see Section 4.2).
With the Camera Configuration Tool, you use the Exposure Tab to set the camera for ExSync
operation and to select the level-controlled or programmable exposure time control mode. If you
select the programmable mode, you must also enter an exposure time. When you enter an
exposure time, the configuration tool will automatically set the "Timer 1" parameter to the correct
value.
With binary commands, you must use the Exposure Time Control Mode command to select
ExSync edge-controlled or ExSync programmable mode. If you choose the programmable mode,
you must also use the Timer 1 command to set the exposure time.

3.2.1.2 Recommendations for Controlling Exposure

in ExSync Level-Controlled Mode

When using the ExSync level-controlled mode to control exposure, several general guidelines
must be followed:
• The ExSync signal must toggle.
• The ExSync signal must remain high for at least 4 µs.
• The ExSync signal must remain low for at least 10 µs.
• If the AOI and Binning features are not being used, the minimum ExSync signal period is
20.83 ms.
• If the AOI feature is being used, the minimum ExSync signal period is equal to
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 minimum ExSync signal period is equal to
1/Maximum Frame Rate where the maximum frame rate is determined by the
formula on page 3-29.
• With very short exposures, use flash light to prevent smearing.
Assuming that these general guidelines are followed, the reaction of the camera to a falling
ExSync signal will be one of two cases. In case one (see Figure 3-4), the falling edge of ExSync
occurs while the camera is transmitting a previously captured frame, that is, when frame valid is
high. In case two (see Figure 3-5), the falling edge of ExSync occurs after the previously captured
frame has been transmitted, that is, when frame valid is low.
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BASLER A202