The "NI Digital Waveform Generator/Analyzer Help" document, under "Fundamentals -> Digital Terminology -> Acquisition -> Dynamic Acquisition", says: "At every clock edge, the Pattern Acquisition Engine stores the current state of each DIO channel configured for dynamic acquisition into onboard memory as a sample." That would seem to imply two samples per clock cycle - one on the rising edge of the clock and one on the falling edge. However, I thought this was only true for Double Data Rate (DDR) operation. In the "Single Data Rate (SDR)" section, the help document says "When the data rate multiplier is configured for SDR operation, the NI digital waveform generator/analyzer generates or acquires data once per Sample clock period. In the "Double Data Rate (DDR)" section, the help document says " When the data rate multiplier is configured for DDR operation, the NI digital waveform generator/analyzer generates or acquires data twice per Sample clock period." Am I mis-reading the Help document? Am I confused about what clocks are being referenced? Something else? If it matters, I'm working with a PXI-6562 card.

Digital I/O

Newbie question about Dynamic Acquisition

The "NI Digital Waveform Generator/Analyzer Help" document, under "Fundamentals -> Digital Terminology -> Acquisition -> Dynamic Acquisition", says: "At every clock edge, the Pattern Acquisition Engine stores the current state of each DIO channel configured for dynamic acquisition into onboard memory as a sample."

That would seem to imply two samples per clock cycle - one on the rising edge of the clock and one on the falling edge.

However, I thought this was only true for Double Data Rate (DDR) operation.

In the "Single Data Rate (SDR)" section, the help document says "When the data rate multiplier is configured for SDR operation, the NI digital waveform generator/analyzer generates or acquires data once per Sample clock period.
In the "Double Data Rate (DDR)" section, the help document says "
When the data rate multiplier is configured for DDR operation, the NI digital waveform generator/analyzer generates or acquires data twice per Sample clock period."

Am I mis-reading the Help document? Am I confused about what clocks are being referenced? Something else?

If it matters, I'm working with a PXI-6562 card.