Operation and Features
3-10
BASLER A202
k
DRAFT
3.2.2 Free-run Operation
In free-run, no ExSync signal is required. The camera generates a continuous internal control
signal based on two programmable parameters: "Timer 1" and "Timer 2." Timer 1 determines how
long the internal signal will remain low and the Timer 2 determines how long the signal will remain
high. The control signal period is equal to Timer 1 plus Timer 2.
When the camera is operating in free-run, the length of the control signal period determines the
camera’s frame rate. (Frame Rate = 1/Control Signal Period.)
When the camera is operating in free-run, it exposes and outputs frames continuously.
In free-run, only the programmable mode of exposure time control is available.
• In
free-run, programmable
mode, the pixels are exposed and charge is accumulated when
the internal control signal is low. The frame is read out and transferred on the rising edge of
internal control signal (see Figure 3-8).
In this mode, the exposure time can be programmed as desired by varying the setting of the
"Timer 1" parameter.
Figure 3-8: Free-run, Programmable Mode
You can set the camera to operate in free-run using either the Camera Configuration Tool Plus
(see Section
and the configuration tool’s on-line help) or binary commands (see Section
).
With the Camera Configuration Tool Plus, you use the Exposure Time Control Mode setting in the
Exposure group to set the camera for free-run and to select the programmable exposure time
control mode. If you choose to operate the camera in free-run, the tool will require you to enter a
frame rate and an exposure time in the Exposure group. The configuration tool will then
automatically set the Timer 1 and Timer 2 parameters so that the camera will operate with the
frame rate and exposure time that you enter.
With binary commands, you must use the Exposure Time Control Mode command to select the
free-run, programmable mode. You must also use the Timer 1 command to set Timer 1 and the
Timer 2 command to set Timer 2.
Summary of Contents for A202k
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Page 19: ...Camera Interface BASLER A202k 2 5 DRAFT Figure 2 3 Camera Frame Grabber Interface...
Page 32: ...Operation and Features 3 2 BASLER A202k DRAFT Figure 3 1 A202k Sensor Architecture...
Page 104: ...Mechanical Considerations 5 6 BASLER A202k DRAFT...
Page 116: ...Feedback iv BASLER A202k DRAFT...
