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Chapter 8: Experiment Synchronization
Previous chapters discussed the configuration of hardware and software for basic operation.
This chapter discusses the following topics associated with experiment synchronization:
•
Shutter Control Modes;
•
Timing {Trigger Response} Modes;
•
Fast Mode
1
;
•
TTL OUT Control.
Depending on the data acquisition software being used, experiment synchronization
parameters are located as follows:
•
WinView/32, WinSpec/32: Parameters are found on the
Experiment Setup —>
Timing
tab.
•
LightField: Parameters are found on the
Shutter
and
Trigger
expanders.
8.1 Shutter Control Modes
When an external entrance slit shutter is being controlled by NIRvana-LN, shutter operation
can be coordinated with the experiment. Available shutter control modes for Full Frame
operation are:
•
Normal;
•
Disable Opened {Always Open};
When selected, the shutter will not operate during the experiment and remains in
the open position.
•
Disable Closed {Always Closed};
When selected, the shutter will not operate during the experiment and remains in
the closed position. This option is useful when making dark signal measurements of
the background, or when no shutter is present in the system.
NOTE:
The red SHUTTER FAULT LED on the NIRvana-LN power
supply illuminates when the shutter is in the Disable Closed
{Always Open} state.
•
Pre Open {Open Before Trigger}.
When selected, the shutter opens as soon as the detector’s internal controller is
ready to receive trigger. This is required if the time between the trigger and the
event is less than a few milliseconds, the time it takes the shutter to open.
This option is available with the following
Timing
{
Trigger Response
} Modes:
— External Sync {Readout Per Trigger};
—
Trigger Start {Start On Single Trigger}.
1. Only supported by WinView/32 and WinSpec/32.