Teledyne PIXIS-XF, System Manual

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Chapter 7 Troubleshooting 83
7.9 Data Overrun Due to Hardware Conflict Message
If this dialog illustrated in Figure 7-5 appears when you try to acquire a test image,
acquire data, or run in focus mode, check the CCD array size and then check the DMA
buffer size.
Figure 7-5: Typical WinSpec/32 Data Overrun Due to Hardware Conflict Dialog
Perform the following procedure to change the DMA buffer setting:
1. Note the array size on the Setup
►
Hardware
►
Controller/CCD tab or the
Acquisition
►
Experiment Setup
►
Main tab, Full Chip dimensions.
2. Open Setup
►
Environment
►
Environment dialog.
3. Increase the DMA buffer size to a minimum of 32 MB (64 MB if it is currently 32 MB
or 128 MB if it is currently 64 MB,) click on OK, and close the WinX/32 application.
4. Reboot your computer.
5. Restart the WinX/32 application and begin acquiring data or focusing. If you see the
message again, increase the DMA buffer size.
7.10 Data Overrun Has Occurred Message
Because of memory constraints and the way that USB transfers data, a Data overrun has
occurred message may be displayed during data acquisition. If this message is
displayed, take one or more of the following actions:
• Minimize the number of programs running in the background while you are
acquiring data with the WinX/32 application.
• Run data acquisition in Safe Mode.
• Add memory.
• Use binning.
• Increase the exposure time.
• Defragment the hard disk.
• Update the USB2 driver.
If the problem persists, your application may be USB 2.0 bus limited. Since the host
computer controls the USB 2.0 bus, there may be situations where the host computer
interrupts the USB 2.0 port. In most cases, the interrupt will go unnoticed by the user.
However, there are some instances when the data overrun cannot be overcome
because USB 2.0 bus limitations combined with long data acquisition times and/or large
data sets increase the possibility of an interrupt while data is being acquired. If your
experiment requirements include long data acquisition times and/or large data sets,
your application may not be suitable for the USB 2.0 interface. If this is not the case and
data overruns continue to occur, contact Teledyne Princeton Instruments Customer
Support. Refer to
Contact Information on page 114 for complete information.
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