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Chapter 4 Analog Input
© National Instruments Corporation 4-11 NI 6232/6233 User Manual
be transferred to host memory. The device generates an error in this case.
With continuous operations, if the user program does not read data out of
the PC buffer fast enough to keep up with the data transfer, the buffer could
reach an overflow condition, causing an error to be generated.
Non-Buffered
In non-buffered acquisitions, data is read directly from the FIFO on the
device. Typically, hardware-timed, non-buffered operations are used to
read single samples with known time increments between them and good
latency.
Analog Input Triggering
Analog input supports three different triggering actions:
• Start trigger
• Reference trigger
• Pause trigger
Refer to the AI Start Trigger Signal, AI Reference Trigger Signal, and AI
Pause Trigger Signal sections for information on these triggers.
A digital trigger can initiate these actions. NI 6232/6233 devices support
digital triggering, but do not support analog triggering.
Connecting Analog Voltage Input Signals
Table 4-4 summarizes the recommended input configuration for both types
of signal sources.