Teledyne Princeton Instruments PI-MTE, System Manual

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Chapter 6 Advanced Topics 67
6.2.2 Safe Mode
In Safe Mode, the host computer processes each frame as it is received. The ST-133 cannot
collect the next frame until the previous frame has been completely processed.
Safe Mode is primarily useful for experiment setup, including alignment and focusing,
when it is necessary to have the most current image displayed on the screen. It is also
useful when data collection must be coordinated through software with external
devices such as external shutters and filter wheels.
As illustrated in
Figure 6-8 , in Safe Mode the host computer controls when each frame
is acquired. After each frame is received, the computer sends the Stop Acquisition
command to the camera instructing it to stop acquisition. Once that frame has been
completely processed and displayed, another Start Acquisition command is sent from
the computer to the camera, allowing it to acquire the next frame of data. Display is
therefore, at most, only one frame behind the actual data collection.
One disadvantage of the Safe Mode is that events may be missed during the
experiment, since the ST-133 is disabled for a short time after each frame.
6.3 TTL Control
NOTE:
This feature is supported by WinView/WinSpec Version 2.6.x
when the communication protocol is TAXI (PCI).
This feature is not supported when the communication
protocol is USB 2.0.
Teledyne Princeton Instruments’ WinView and WinSpec software packages incorporate
WinX32 Automation, a programming language that can be used to automate
performing a variety of data acquisition and data processing functions, including use of
the TTL In/Out functions.
WinX32 Automation can be implemented in programs written in Visual Basic or Visual
C++.
Refer to the WinX32 documentation for detailed information.
The TTL lines are accessed through the TTL In/Out connector on the rear of the ST-133
Controller. This connector provides:
• Eight (8) TTL IN lines;
• Eight (8) TTL OUT lines;
• An input control line.
See Figure 6-9 for a pinout of the connector.
Refer to Table 6-2 for information about pin assignments.