Single Two-Signal Edge-Separation Measurement - National Instruments DAQ X Series User Manual

The counter stops counting upon receiving an active edge on the Gate input.
The counter stores the count in the FIFO.
You can configure the rising or falling edge of the Aux input to be the active
edge. You can configure the rising or falling edge of the Gate input to be
the active edge.
Use this type of measurement to count events or measure the time that
occurs between edges on two signals. This type of measurement is
sometimes referred to as start/stop trigger measurement, second gate
measurement, or A-to-B measurement.
Refer to the following sections for more information about the X Series
edge-separation measurement options:
•
•
•
•

Single Two-Signal Edge-Separation Measurement

With single two-signal edge-separation measurement, the counter counts
the number of rising (or falling) edges on the Source input occurring
between an active edge of the Gate signal and an active edge of the Aux
signal. The counter then stores the count in the FIFO and ignores other
edges on its inputs. Software then reads the stored count.
Figure 7-24 shows an example of a single two-signal edge-separation
measurement.
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Single Two-Signal Edge-Separation Measurement
Implicit Buffered Two-Signal Edge-Separation Measurement
Sample Clocked Buffered Two-Signal Separation Measurement
Hardware-Timed Single Point Two-Signal Separation Measurement
Counter
Armed
AUX
GATE
SOURCE
Counter Value 0 0 0 0
Latched Value
Figure 7-24. Single Two-Signal Edge-Separation Measurement
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Chapter 7
Measured Interval
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X Series User Manual
Counters
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