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Chapter 7 Troubleshooting 89
89
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:
1. Minimize the number of programs running in the background while you are
acquiring data with the WinX application.
2. Run data acquisition in Safe Mode.
3. Add memory.
4. Use binning.
5. Increase the exposure time.
6. Defragment the hard disk.
7. 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 Customer Support (see page 132 for contact information).
Device Is Not Found
When LightField is started, it looks for devices (cameras, spectrographs, and filters) that
are powered on and connected via a communications interface to the host computer. If it
cannot find a device that was used in the last experiment, it will continue to look for it.
Figure 53. Devices Missing dialog
Make sure the device is connected and powered on. If the device is connected but
turned off, switch it on. LightField should now find the device. If it does not,
cancel the load and restart LightField.