Teledyne Princeton Instruments PI-MTE, System Manual

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Chapter 6 Advanced Topics 65
Figure 6-7: Timing Diagram: Continuous Cleans, Negative Edge Trigger
6.2 Fast and Safe Modes
The WinView Experiment Setup
►
Timing tab configures Fast Mode or Safe Mode.
Figure 6-8 compares the two modes.
6.2.1 Fast Mode
In Fast Mode, the ST-133 runs according to the timing of the experiment with no
interruptions from the host computer.
Fast Mode operation is primarily for collecting real-time sequences of experimental data,
where timing is critical and events cannot be missed. Once the ST-133 has been sent the
Start Acquisition command by the computer, all frames are collected without further
intervention.
The advantage of this triggering mode is that experiment timing is controlled
completely through hardware.
A drawback to this mode is that the computer only displays frames when it is not
performing other tasks. Image Display has a lower task priority, so images on the
monitor may lag several images behind.
NOTE:
A video monitor connected to the VIDEO output will always
display the current image.
A second drawback is that a data overrun may occur if the number of images collected
exceeds the amount of allocated RAM or if the computer cannot keep up with the data
rate.
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