Aggregate Versus Single Channel Sample Rates - National Instruments DAQ X Series User Manual

If an AI Reference Trigger (ai/ReferenceTrigger) pulse occurs before the
specified number of pretrigger samples are acquired, the trigger pulse is
ignored. Otherwise, when the AI Reference Trigger pulse occurs, the
sample counter value decrements until the specified number of posttrigger
samples have been acquired.
MIO X Series devices feature the following analog input timing signals:
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Signals with an
of Chapter 8, PFI, for more information.

Aggregate versus Single Channel Sample Rates

MIO X Series devices are characterized with maximum single channel and
maximum aggregate sample rates. The maximum single channel rate is the
fastest you can acquire data on the device from a single channel and still
achieve accurate results. The maximum aggregate sample rate is the fastest
you can acquire on multiple channels and still achieve accurate results. For
example, NI 6351 devices have a single channel maximum rate of
1.25 MS/s and aggregate maximum sample rate of 1 MS/s so they can
sample one channel at 1.25 MS/s or two channels at 500 kS/s per channel,
as shown in Table 4-4.
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AI Sample Clock Signal
AI Sample Clock Timebase Signal
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AI Convert Clock Signal
AI Convert Clock Timebase Signal
AI Hold Complete Event Signal
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AI Start Trigger Signal
AI Reference Trigger Signal
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AI Pause Trigger Signal
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support digital filtering. Refer to the
Table 4-4. Analog Input Rates for MIO X Series Devices
MIO X Series Device
NI 632x
NI 634x
4-27
Chapter 4
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PFI Filters
Analog Input Rate
Multi-Channel
Single Channel (Aggregate)
250 kS/s 250 kS/s
500 kS/s 500 kS/s
X Series User Manual
Analog Input
section