User`s manual

Operation and Features
Basler L304kc 3-9
Draft
•In free-run programmable mode, the pixels are exposed and charge is accumulated when
the internal control signal is low. The lines are read out and transferred on the rising edge of
the internal control signal (see Figure 3-7).
In this mode, the line period is determined by the setting for the line period parameter. The
exposure time parameter setting determines how long the control signal will be low and thus
determines the exposure time.
Figure 3-7: Free-run, Programmable Mode
3.3.2.2 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 4.1), 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 a value to the Mode field of the Exposure
Time Control Mode CSR (see page 4-14).
You set the line period by writing a value to the Absolute Line Period field or to the Raw Line Period
field of the Line Period CSR (see page 4-17).
If you select the free-run programmable mode, you will also need to set the exposure time. You
set the exposure time by writing a value to the Absolute Exposure Time field or to the Raw
Exposure Time field of the Exposure Time CSR (see page 4-15).
Section 4.2.2 explains CSRs and the difference between using the “absolute” field and the “raw”
field in a CSR. Section 4.3.1 explains using read/write commands.