32
Lansis
®
System Manual
Issue 1
EAR99
Technology
Subject
to
Restrictions
Contained
on
the
Cover
Page.
Whether or not the data are displayed and/or stored depends on the data collection
operation that has been selected in the application software:
•
Preview
Data collection operations use the Experiment Setup parameters to establish
the exposure time (the period when signal of interest is allowed to accumulate
on the CCD). Preview is typically used when setting up the system
In Preview mode, the number of frames is ignored. A single frame is acquired
and displayed, another frame is acquired which overwrites the currently
displayed data, and so on, until Stop is selected.
NOTE:
The last frame acquired before Stop is selected cannot be
stored.
However, the last frame of data can be saved by configuring
the Number of Frames to 1 and clicking Acquire rather than
Stop.
Preview mode is particularly convenient for familiarization and configuration.
For ease in focusing, the screen refresh rate should be as quick as possible,
achieved by operating with axes and cross-sections off, and with Zoom 1:1
selected.
•
Acquire
Acquire mode is typically used for the collection and storage of data. In Acquire
mode, every frame of data collected can be automatically stored, so the
completed dataset may include multiple frames with one or more
accumulations. This mode is typically selected during actual data collection.
One limitation of Acquire mode operation is that if data acquisition continues at
too fast a rate for it to be stored, data overflow may occur. If this happens, try
the following to remedy the situation:
— Shut down any other programs that may be running and utilizing resources;
— Decrease the camera speed;
— Use a faster host computer.
