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Appendix C Common Questions
6023E/6024E/6025E User Manual C-2 ni.com
Installation and Configuration
How do I set the base address for my device?
The base address of your device is assigned automatically through the
PCI/PXI bus protocol. This assignment is completely transparent to you.
What jumpers should I be aware of when configuring my E Series
device?
The E Series devices 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.
What version of NI-DAQ must I have to use my 6023E/6024E/6025E?
Yo u mu s t hav e NI-DAQ for PC Compatibles version 6.5 or higher to use a
PCI a PXI device. To use the DAQCard-6024E you must have NI-DAQ for
PC compatibles version 6.9 or higher.
Analog Input and Output
I’m using my device in differential analog input mode and I have
connected a differential input signal, but my readings are random and
drift rapidly. What’swrong?
Check yourground-reference connections. Your signalcan be referencedto
a level that is considered floating with reference to the device ground
reference. Even if you are in differential mode, you must still reference the
signal 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.
I’m using the DACs to generate a waveform, but I discovered with a
digital oscilloscope that there are glitches on the output signal. Is this
normal?
When it switches from one voltage to another, any DAC produces glitches
due to released charges. The largest glitches occur when the most
significant bit (MSB) of the D/A code switches. You can build a lowpass