Teledyne Princeton Instruments PI-MTE, Системное руководство

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84 PI-MTE System Manual Issue 6
7.10.3 Operation
There are no operating considerations that are unique to the PCI Serial card. The card
can easily accept data as fast as any Teledyne Princeton Instruments system now
available can send it. The incoming data is temporarily stored in the card’s memory, and
then transferred to the main computer memory when the card gains access to the bus.
The PCI bus arbitration scheme assures that, as long as every PCI card conforms to the
PCI guidelines, the on-board memory will never overflow.
Unfortunately, there are some PCI peripheral cards that do not fully conform to the PCI
guidelines and that take control of the bus for longer periods than the PCI specification
allows. Certain video cards (particularly those that use the S3 video chip) are notorious
in this respect. Usually you will be able to recognize when memory overflow occurs
because the displayed video will assume a split-screen appearance and/or the message
Hardware Conflict will be displayed (WinView/32). At the same time, the LED on the
upper edge of the PCI Serial card will light.
Users are thus advised not to take any actions that would worsen the possibility of
memory overflow occurring when taking data. In that regard, avoid multitasking while
taking data. Specific operations to avoid include multitasking (pressing ALT-TAB or
ALT-ESC to start another program), or running a screen saver program.
7.11 Program Error
Figure 7-11 illustrates a typical program error dialog that may be displayed the DMA
buffer size is too small when attempting to acquire a test image, acquire data, or run in
focus mode. A large array (e.g., a 2048 x 2048 array,) requires a larger setting than that
for a smaller array (e.g., a 512 x 512 array).
Figure 7-11: Typical Program Error Dialog
Perform the following procedure to change the DMA Buffer size configuration:
1. Click OK to dismiss the error dialog.
2. Reboot WinView.
3. Note the array size displayed in the Full Chip dimension field on the
Setup
►
Hardware
►
Controller/CCD tab or the Acquisition
►
Experiment
Setup
►
Main tab.
4. Open Setup
►
Environment
►
Environment dialog box.
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