Using A Software Line Start Trigger Signal; Introduction - Basler Racer User Manual

AW00118508000
6.1.4

Using a Software Line Start Trigger Signal

6.1.4.1

Introduction

When the TriggerMode parameter is set to On and the TriggerSource 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. 17 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
ExposureMode parameter must be set to Timed. The exposure time for each acquired line will be
determined by the value of the camera's ExposureTimeAbs 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 times for each acquired line are as shown in
Table 10.
raL2048- raL4096-
80km
Min 2.0 µs
Max 10000 µs 10000 µs
Table 10: 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.
Basler racer Camera Link
raL6144-
80km 80km
2.0 µs 2.0 µs
10000 µs
raL8192- raL12288-
80km 66km
2.0 µs 2.0 µs
10000 µs 10000 µs
Acquisition Control
60