Basler raL2048-48gm User Manual Page 103

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AW00118302000 Acquisition Control
Basler racer GigE 93
maximum exposure time. Keep in mind, however, that using a very long exposure time can lead to
significant degradation of the image quality.
8.2.5.2 Exposure Time Parameters
If you are operating the camera in either of the following ways, you must specify an exposure time
by setting the camera’s exposure time parameters:
the Line Start Trigger Mode is set to Off
the Line Start Trigger Mode is set to On and the Timed Exposure Time Control Mode is
selected
There are two ways to specify the exposure time: by setting "raw" parameter values or by setting
an "absolute" parameter value. The two methods are described below. You can use whichever
method you prefer to set the exposure time.
Setting the Exposure Time Using "Raw" Settings
When exposure time is set using "raw" values, the exposure time will be determined by a
combination of two elements. The first element is the value of the Exposure Time Raw parameter.
The second element is the Exposure Time Base that is 100 ns on racer cameras.
Exposure Time = (Exposure Time Raw Parameter Value) x 100 ns
The Exposure Time Raw parameter value can be set in a range from 1 to 4095.
raL2048-
48gm
raL4096-
24gm
raL6144-
16 gm
raL8192-
12 gm
raL12288-
8 gm
Min 2.0 µs 2.0 µs 2.0 µs 2.0 µs 2.0 µs
Table 10: Minimum Allowed Exposure Times
The exposure time, i.e. the product of the Exposure Time Raw parameter setting
and the Exposure Time Base Abs parameter value (i.e., 100 ns) must be equal to
or greater than the minimum exposure specified in the table on the previous page.
It is possible to use the parameters to set the exposure time lower than what is
shown in the table, but this is not allowed and the camera will not operate properly
when set this way.
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.
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