Teledyne Photometrics KINETIX, Руководство пользователя, Страница: 33 / 48

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58-723-004 Rev A01
Usage Summary of Level Trigger Modes
In Level Trigger Mode, the trigger voltage can fall to 0 before all the rows in Frame 1
have received the full exposure time that Row 1 received. In this case, the rest of the
rows in Frame 1 will be exposed for a time equal to Row 1’s exposure time, and then all
rows in Frame 1 are read out. This preserves the signal across the field of the sensor but
delays the time before Frame 2 can be triggered.
Level Trigger Overlap Mode minimizes dead time between exposures but the individual
rows in the image might not receive the same integration times. As an example, in a 10
row image, with a 1 msec time to read a row, the trigger-in signal is set high for 6 msec.
Row 1 integrates signal for 6 msec and reads out. Row 2, which started 1 msec after Row
1, integrates for 5 msec and then reads out. Rows 7-10, having started after the trigger-
in has dropped to 0, integrate for 0 msec and then read out. This implementation
maintains the full dimensions of the image but carries the risk that poorly set timing
inputs can lead to the image having different exposure times down the columns.
Note: The Kinetix camera’s software trigger modes are essentially identical to the
hardware trigger modes except for the trigger input. In software trigger modes, the
trigger input will be provided by the application itself in the form of a host command.
Usually, the application will use a periodic timer to issue the software trigger, or it will
issue the software trigger based on another software event (e.g., a click of a button, a
serial port signal from another device). The latency between issuing a PVCAM
software trigger command and actual acquisition start should be less than a
millisecond. For more details, refer to the
PVCAM User Manual and SDK
documentation.
Software Trigger Edge
This mode is an alternative to the Edge Mode described above. Every new acquisition has to
be started by an independent trigger signal sent by the host as a PVCAM command.
Software Trigger-First
In this mode, which is an alternative to the hardware Trigger-First Mode, the sequence or
continuous acquisition is started by a single software trigger sent by the host as a PVCAM
command.
Expose Out
Modes
User-settable Expose Out Modes provide flexibility in different experimental scenarios.
The Expose Out trigger modes for Kinetix as of August 30, 2021, include:
• First Row
• All Rows
• Rolling Shutter
•
Line Output
•
Any Row