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The NI PXI-4132 can acquire measurements
automatically after a sourcing operation or when triggered.
The NI PXI-4132 uses integrating ADCs for
sampling voltage and current. The NI PXI-4132 measurement
circuitry operates in one of the three active states:
- Signal conversion—During signal conversion, the NI
PXI-4132 samples the input signal for the programmed aperture
time of the device.
- Zero conversion—When auto zero is enabled, the NI
PXI-4132 samples a zero and uses it to compensate for internal
offsets. Zero conversion usually occurs after, and has the same
aperture as, the signal conversion. Refer to NI PXI-4132 Auto Zero for more
- Settling time—During settling time, the analog
circuitry of the device settles before the next measurement
||Note Settling time on the NI PXI-4132 is ~300 µs and is not user-programmable. If Auto-Zero is enabled, there will be settling time for the zero measurement as well as the output measurement, resulting in a ~600 µs settling time.
The following figure illustrates the sequence of
these states for a one sample measurement.
You can configure measurement options such as
aperture time and auto zero on the NI PXI-4132 to achieve
a desired accuracy and/or speed. Expand this book for information
about how to configure measurements to achieve specific
NI PXI-4132 Triggers and