Appendix C Troubleshooting
© National Instruments Corporation C-3 M Series User Manual
Analog Output
I am seeing glitches on the output signal. How can I minimize it?
When you use a DAC to generate a waveform, you may observe glitches on
the output signal. These glitches are normal; when a DAC switches from
one voltage to another, it produces glitches due to released charges. The
largest glitches occur when the most significant bit of the DAC code
changes. You can build a lowpass deglitching filter to remove some of these
glitches, depending on the frequency and nature of the output signal. Visit
ni.com/support for more information about minimizing glitches.
Counters
When multiple sample clocks on my buffered counter measurement
occur before consecutive edges on my source, I see weird behavior.
Why?
Duplicate count prevention ensures that the counter returns correct data for
counter measurement in some applications where a slow or non-periodic
external source is used.
Refer to the Duplicate Count Prevention section of Chapter 7, Counters,
for more information.
How do I connect counter signals to my M Series device?
The Default Counter/Timer Pinouts section of Chapter 7, Counters, has
information about counter signal connections.
M Series Installation Issues
My M Series device is not detected by Measurement & Automation
Explorer (MAX) or the Windows 2000/NT/XP operating system.
When using other devices (such as E Series devices) on the same PC,
they work fine. What is the problem?
Appendix D, Upgrading from E Series to M Series, lists some issues
encountered when upgrading from E Series to M Series devices.
Customers also can refer to NI’s KnowledgeBase at
ni.com/kb and
Developer Zone at
ni.com/devzone for more updated troubleshooting
tips and answers to frequently asked questions about M Series devices.
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