Sample Clocked Buffered Pulse Measurement; Hardware-Timed Single Point Pulse Measurement - National Instruments PCIe-6323 User Manual

Figure 7-9 shows an example of an implicit buffered pulse measurement.
Counter Armed
Gate
Source
Buffer

Sample Clocked Buffered Pulse Measurement

A sample clocked buffered pulse measurement is similar to single pulse measurement, but a
buffered pulse measurement takes measurements over multiple pulses correlated to a sample
clock.
The counter performs a pulse measurement on the Gate. On each sample clock edge, the counter
stores the high and low ticks in the FIFO of the last pulse to complete. A DMA controller
transfers the stored values to host memory.
Figure 7-10 shows an example of a sample clocked buffered pulse measurement.
Figure 7-10. Sample Clocked Buffered Pulse Measurement
Counter
Armed
Gate
Source
Sample
Clock
Buffer

Hardware-Timed Single Point Pulse Measurement

A hardware-timed single point (HWTSP) pulse measurement has the same behavior as a sample
clocked buffered pulse measurement.
Note If a pulse does not occur between sample clocks, an overrun error occurs.
Note (NI USB-634
hardware-timed single point (HWTSP) operations.
Figure 7-9. Implicit Buffered Pulse Measurement
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Devices) USB X Series devices do not support
X Series User Manual
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