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National Instruments Corporation
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Common Questions
This appendix contains a list of commonly asked questions and their
answers relating to usage and special features of the device.
General Information
What is the DAQ-STC?
The DAQ-STC is the system timing control application-specific integrated
circuit (ASIC) designed by NI and is the backbone of the E Series devices.
The DAQ-STC contains seven 24-bit counters and three 16-bit counters.
The counters are divided into the following three groups:
•
AI—two 24-bit, two 16-bit counters
•
AO—three 24-bit, one 16-bit counters
•
GPCTR—two 24-bit counters
You can independently configure the groups with timing resolutions of
50 ns or 10
µ
s. With the DAQ-STC, you can interconnect a wide variety of
internal timing signals to other internal blocks. The interconnection scheme
is flexible and software configurable. Capabilities such as buffered pulse
generation, equivalent time sampling, and seamlessly changes to the
sampling rate are possible.
What does sampling rate mean to me?
Sampling rate is the fastest you can acquire data on the device and still
achieve accurate results. For example, the PCI-6052E has a sampling rate
of 333 kS/s. This sampling rate is aggregate: one channel at 333 kS/s or two
channels at 166.5 kS/s per channel illustrates the relationship. The
PCI-6052E has settling times that vary with gain and accuracy. Refer to
Appendix A,
, for exact specifications.
What type of +5 V protection do the PCI-6052E, PXI-6052E, and
DAQPad-6052E have?
The PCI-6052E, PXI-6052E, and DAQPad-6052E have +5 V lines
equipped with a self-resetting 1 A fuse.
