Andor Technology Zyla sCMOS 4.2 PLUS, Hardware Manual

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version 2.0 rev 18 Feb 2021
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2.6.2.12 Rolling Shutter Triggering Constraints
The table below shows a summary of constraints when operating in Rolling Shutter mode:
Table 21: Rolling Shutter Mode Triggering Constraints
Rolling Shutter Triggering Modes Exposure Range
Max
trigger
Jitter
Min
trigger
pulse
width
Fast
exposure
switching
supported
Internal
(Non Overlap)
User settable exposure time. User settable
Cycle Time.
1 Row to 30 s - - √
Internal Overlap
(Overlap On)
User settable exposure time. 1 Row to 30 s - - √
External
(Non Overlap)
Exposure time user settable. Cycle Time
controlled via external trigger pulse
3 Rows to 30 s 1 Row
2 Sensor
Clocks
√
Software
(Non Overlap)
Exposure time user settable. Cycle Time
controlled via software trigger function
3 Rows to 30s 1 Row
2 Sensor
Clocks
√
External Exposure
(Non Overlap)
Exposure Time controlled by width of
external trigger pulse. Cycle Time controlled
via period of external trigger pulse.
3 Rows to 30s 1 Row
2 Sensor
Clocks
x
External Exposure
(Overlap On)
Exposure time controlled by period of exter-
nal trigger pulse
(1 Frame + 1 Row) to 30 s 1 Row
2 Sensor
Clocks
x
External Start
(Non Overlap)
User settable exposure time. User settable
Cycle Time.
1 Row to 30 s
2 Frames
1 Row
2 Sensor
Clocks
√
Global Clear- Internal
(Non Overlap)
User settable exposure time. Cycle Time
is read out time for short exposures. User
settable Cycle time for long exposures. Zyla
4.2 only.
(1 Frame + 1 Row) to 30 s 1 Row - √
Global Clear External/
Software Triggering
(Non-Overlap)
Exposure time user settable. Cycle Time
controlled via period of external trigger
pulse. Zyla 4.2 only.
(1 Frame + 1 Row) to 30 s 1 Row
2 Sensor
Clocks
√
Global Clear External
Exposure
(Non-Overlap)
Exposure Time controlled by width of exter-
nal trigger pulse.
Cycle Time controlled via period of external
trigger pulse. Zyla 4.2 only.
(1 Frame + 1 Row) to 30 s 1 Row
1 Frame +
1 Row
√
NOTES:
1. Exposure Time granularity for all modes is sensor row based so the exposure time in the dialog will always be
rounded to the nearest integer number of row readout times.
2. 1 Row is the time taken to perform a full row readout (2624 clock cycles Zyla 5.5; 2592 clock cycles Zyla 4.2), i.e.
depends on readout rate.
3. 1 Frame is the image height of a sensor half, defined in Rows and determined by the ROI configured, e.g. full frame.
This is the number of rows that is read out by each sensor half. The frame readout time for any ROI can be requested
via SDK function. (Refer to SDK3 User Guide for details).
4. A short exposure is referred to an exposure that is less than a Frame Readout Time. (Depends on ROI selected).
5. A long exposure is referred to an exposure time that is greater than a Frame Readout Time. (Depends on ROI
selected).