User`s manual

Acquisition Control AW00118501000
48 Basler racer Camera Link
6.1.4 Using a Software Line Start Trigger Signal
6.1.4.1 Introduction
If the Line Start Trigger Mode parameter is set to on and the Trigger Source parameter is set to
software, you must apply a software line start trigger signal to the camera to begin each line
acquisition. Assuming that the camera is in a "waiting for line start trigger" acquisition status, line
exposure will start when the software line start trigger signal is received by the camera. Fig. 10
illustrates line acquisition with a software line start trigger signal.
When the camera receives a software trigger signal and begins exposure, it will exit the "waiting for
line start trigger" acquisition status because at that point, it cannot react to a new line start trigger
signal. As soon as the camera is capable of reacting to a new line start trigger signal, it will
automatically return to the "waiting for line start trigger" acquisition status.
Timed Exposure Mode
When you are using a software trigger signal to start each line acquisition, the camera’s Exposure
Mode must be set to timed. The exposure time for each acquired line will be determined by the
value of the camera’s Exposure Time Abs parameter if you are parameterizing the camera with
Basler pylon or by the Exposure Time Raw register if you are parameterizing the camera via direct
register access.
The minimum and the maximum allowed exposure time for each acquired line are as shown in
Tab le 6.
raL2048-
80km
raL4096-
80km
Min 2.0 µs 2.0 µs
Max 10000 µs 10000 µs
Table 6: Minimum and Maximum Allowed Exposure Times
If you are using a GenICam compliant tool such as the Basler pylon Viewer and
you attempt to set the exposure time to exactly the minimum allowed or to exactly
the maximum allowed, you will see unusual error codes. This is an artifact of a
rounding error in the GenICam interface architecture. As a work around, you could
set the exposure time slightly above the minimum or below the maximum. Values
between the minimum and the maximum are not affected by the problem.