Dynamic acquisition, Figure 7. dynamic acquisition functional diagram, Table 3. supported impedance settings – National Instruments PXI-6561/6562 User Manual
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NI Digital Waveform Generator/Analyzer Guide
When performing dynamic acquisition with the NI 654X/655X, the source
generating the signals needs a matched source impedance as close to 50
possible to minimize signal reflections and maintain optimal signal quality.
Figure 7 shows a diagram of a dynamic acquisition system using the NI 655X
as an example.
Figure 7. Dynamic Acquisition Functional Diagram
NI digital waveform generator/analyzers have various input
impedance settings, as shown in the following table.
Refer to the NI Digital Waveform Generator/Analyzer Help for more
information about signal termination.
Table 3. Supported Impedance Settings
Supported Input Impedance
or 10 k
for channels configured for
LVDS operation; 10 k
configured for single-ended operation
NI 656X cables use 100
differential impedance rather than 50