National Instruments DAQ PCI E Series User Manual page 128

Appendix C Common Questions
Installation and Configuration
Analog Input and Output
PCI E Series User Manual
settling times that vary with gain and accuracy. See Appendix A for
exact specifications.
What type of 5 V protection do the PCI E Series boards have?
The PCI E Series boards have 5 V lines equipped with a self-resetting 1
A fuse.
How do you set the base address for a PCI E Series board?
The base address of a PCI E Series board is assigned automatically
through the PCI bus protocol. This assignment is completely
transparent to you.
What jumpers should I be aware of when configuring my
PCI E Series board?
The PCI E Series boards are jumperless and switchless.
Which National Instruments document should I read first to get
started using DAQ software?
Your NI-DAQ or application software release notes documentation is
always the best starting place.
I'm using my board in differential analog input mode and I have
connected a differential input signal, but my readings are random
and drift rapidly. What's wrong?
Check your ground reference connections. Your signal may be
referenced to a level that is considered floating with reference to the
board ground reference. Even if you are in differential mode, the signal
must still be referenced to the same ground level as the board reference.
There are various methods of achieving this while maintaining a high
common-mode rejection ratio (CMRR). These methods are outlined in
Chapter 4, Signal Connections.
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