Teledyne PIXIS-XF, System Manual

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58 PIXIS-XF System Manual Issue 5
6.1 Timing Modes
The basic PIXIS-XF timing modes are:
• Free Run {No Response}
• External Sync {Readout Per Trigger}
• External Sync {Readout Per Trigger} with Continuous Cleans {Clean Until
Trigger}.
Timing modes are combined with Shutter options to provide the widest variety of
timing modes for precision experiment synchronization. Refer to
Table 6-1 .
NOTE:
Since PIXIS-XF cameras do not use shutters, the Shutter
Type parameter on the Hardware Setup
►
Controller/
Camera tab should be set to None.
Available shutter options include Normal, PreOpen {Open Before Trigger}, Disable
Opened {Always Open} or Disable Closed {Always Closed}. Disable means that the
shutter will not operate during the experiment. Disable Closed {Always Closed} is useful
for making dark charge measurements. PreOpen {Open Before Trigger}, available in the
External Sync {Readout Per Trigger} and External Sync {Readout Per Trigger} with
Continuous Cleans {Clean Until Trigger} modes, opens the shutter as soon as the
PIXIS-XF is ready to receive an External Sync pulse. This is required if the time between
the External Sync pulse and the event is less than a few milliseconds, the time it takes
the shutter to open.
The shutter timing is shown in the timing diagrams included in the following sections.
With the exception of Free Run where the modes of shutter operation are identical,
both Normal and PreOpen lines are illustrated in the timing diagrams and flow chart.
The timing diagrams are labeled with:
• Exposure Time (t
exp
);
• Shutter Compensation Time (t
c
);
• Readout Time (t
R
).
Exposure time and readout are discussed in greater detail in Chapter 5, Operation .
NOTE:
When no shutter is configured, the shutter compensation
time (the time required to close a mechanical shutter) will
be approximately 0 ms.
Table 6-1: Camera Timing Modes
Mode Shutter Condition
Free Run {No Response} Normal
External Sync {Readout Per Trigger} Normal
External Sync {Readout Per Trigger} PreOpen {Open Before Trigger}
External Sync {Readout Per Trigger} with Continuous
Cleans {Clean Until Trigger} Normal
External Sync {Readout Per Trigger} with Continuous
Cleans {Clean Until Trigger} PreOpen {Open Before Trigger}