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98 I-PentaMAX System Manual Version 3.A
• Observe the calculated readout time. If you need a shorter period, change the
settings (for example, enter a smaller Y-dimension or use binning in the
Y-direction) and click on the
Download Virtual Chip Definition button again.
• Click on
Close.
18. From the Acquisition menu, select Experiment Setup and enter the following
settings:
Main tab card
•
Exposure Time: Enter a value. The exposure time can either be greater
than the readout time or it can be equal to the readout time. If you want
an exposure time > readout time, enter a value larger than the readout
time calculated when the virtual chip definition was downloaded. If you
want an exposure time = readout time, enter 000 sec.
•
Number of Images: Enter the desired number of images.
• Use Region of Interest
• Accumulations: 1
ADC tab card
•
Type: FAST
ROI Setup tab card: Make no changes to the settings on this tab card unless
you have re-enabled Normal Operating Mode. ROI setup for Virtual Chip
(High Speed Mode) is performed through the Virtual Chip dialog box.
19. From the Setup menu, select Environment.
Note: When setting up for focusing, the number of Frames/Interrupt should be left
at 1.
• DMA Buffer (Mb): By default, the buffer size is 8 Mb. Using the following
formula, calculate the amount of DMA memory required:
X × Y × #Frames × (2 bytes/pixel).
For example, the buffer size required for a 41x41 virtual array acquiring
1000 frames would be 41 × 41 × 1000 frames × (2 bytes/pixel) = 3.4 Mb.
If the calculated value is greater than 8 Mb, enter the appropriate size.
Note: This value is not enabled until you restart your computer.
• Frames/Interrupt: If the number of frames is greater than 256 (the pre-
programmed slot limit for a PCI card), increase the number of
Frames/Interrupt value. Use the formula #Frames/256 and round the result
to the next highest integer to calculate that value. For example, 1000
frames/256 will result in 3.9, so enter 4.
Note: This value should be 1 for Focus mode.
20. Click on OK after you have finished entering the Environment settings.
21. Set the SHUTTER/GATE switch on the IIC-200 to "SHUTTER". If the audible alarm
beeps, immediately reduce the light level or immediately switch
MCP POWER/OFF
to "OFF" and reduce the light level. Once you have reduced the light level, switch
MCP POWER/OFF back to "MCP POWER" (if you turned it "OFF") and try again.