Princeton Instruments NIRvana-LN, User Manual, Page: 82 / 122

82 NIRvana
™
-LN System Manual Issue 4
9.3 Monitoring Experiment Progress
An NDRO experiment’s progress is monitored and displayed using several criteria:
• Progress Circle
Once an experminent has been started, the Progress Circle is displayed to the right
of the three (3) Experiment Control buttons. See
Figure 9-5 .
Figure 9-5: Typical Experiment Progess Circle Display: 25% Complete
When performing standard experiments (i.e., DRO,) the Progress Circle indicates
Exposure Per Frame progress. However, when an NDRO experiment is being
performed, it represents the elapsed percentage of the Exposure Time for a single
Destructive Readout cycle.
For example, consider an NDRO experiment with the following configuration
settings:
— Exposure Time
= 20 seconds;
After 20 seconds, a Destructive Readout and cleaning is initiated.
— NDRO Period
= 5 seconds.
An NDRO is performed at 5 seconds, 10 seconds, and 15 seconds for each
frame exposure.
Five seconds after the start of the experiment, 25% of the programmed Exposure
Time has elapsed. Therefore, the indicator will have swept out 25% of the circle
(represented by green shading,) similar to that shown in
Figure 9-5 .
At the end of the programmed exposure time, a Destructive Readout and cleaning is
performed, the Progress Circle is reset to zero, and the progress indicator starts
sweeping another circle.
NOTE:
When the programmed NDRO Period is longer than or equal to
the programmed
Exposure Time
, no NDRO frames will be
read/displayed, and the Progress Circle will not be active.
• Waiting for Data Progress Bar
The
Waiting for Data
bar displays the progress/elapsed time between two
consecutive data readout operations. Following each readout, the bar is reset to
zero. The progress bar shown
Figure 9-6 indicates that approximately 50% of the
time has elapsed between two readout operations.
Figure 9-6: Typical Waiting for Data Progress Bar: 50% Elapsed
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