User`s manual

Exposure Start and Exposure Time Control
72 Basler sprint Mono Cameras
 In free run programmable mode, line acquisition begins on the rising edge of the ExSyc
signal. The pixels are exposed and charge is accumulated when the internal control signal is
low. The pixel values are read out of the sensor on the rising edge of the internal control signal
as shown in Figure 31.
In this mode, the line period is determined by the setting for the line period parameter. The ex-
posure time parameter setting determines how long the control signal will be low and thus de-
termines the exposure time.
Fig. 31: Free Run, Programmable Mode
4.2.2 Selecting a Free Run Exposure Mode, Setting the
Line Period, and Setting the Exposure Time
You can select a free run exposure time control mode, set the line period, and set the exposure time
for the free run programmable mode with the Camera Configuration Tool Plus (CCT+) or by using
binary write commands from within your own application to set the camera’s control and status
registers (CSRs).
With the CCT+
With the CCT+ (see Section 7.1 on page 156), you use the Exposure Time Control Mode parameter
in the Exposure parameters group to select the free run edge controlled or free run programmable
exposure time control mode. The Line Period parameter is used to set the line period. If you select
the free run programmable mode, you can use the Exposure Time parameter to set the exposure
time.
By Setting CSRs
You select the exposure time control mode by writing the appropriate value to the Mode field of the
Exposure Time Control Mode CSR (see page 168).
You set the line period by writing a value in µs to the Absolute Line Period field or by writing an
integer value to the Raw Line Period field of the Line Period CSR (see page 171).
Line Period
Exposure Time
Line Readout
Internal
Control
Signal