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Appendix B
Troubleshooting and Common Questions
©
National Instruments Corporation
B-7
Single-Cycle DMA Required
This error occurs if the Diagnostic utility detects that it is unable to
perform demand-mode DMA for the GPIB interface and that the GPIB
software has not been configured to use single-cycle DMA. GPIB
interfaces that use the system DMA controller (such as the
AT-GPIB/TNT) normally use demand-mode DMA. If you get this error,
you should use the Device Manager to configure the GPIB software to
use single-cycle DMA for all DMA transfers, and then run the
Diagnostic utility again.
To configure the GPIB software to use single-cycle DMA for a
particular GPIB interface, complete the following steps:
1.
Double-click on the System icon under Start»Settings»Control
Panel.
2.
In the System Properties dialog box that appears, select the
Device Manager tab.
3.
Click on the View devices by type button at the top of the
Device Manager page.
4.
Double-click on the National Instruments GPIB Interfaces icon.
5.
Double-click on the GPIB interface to be configured.
6.
Select the GPIB Settings tab.
7.
Click on the Advanced button and make sure that the Demand
Mode DMA item is unchecked.
GPIB Software Problem Encountered
This error occurs if the Diagnostic utility detects that it is unable to
communicate correctly with the GPIB hardware using the installed
GPIB software. If you get this error, shut down your computer, restart
it, and run the Diagnostic utility again. If the problem persists, try
reinstalling the GPIB software.
Unknown Problem Encountered
This error occurs if an unknown problem is encountered while trying to
execute the Diagnostic utility. If you encounter this problem, shut down
your computer, restart it, and run the Diagnostic utility again. If the
problem persists, try reinstalling the GPIB software.