National Instruments USB-621 Series User Manual

Chapter 8 Counters
© National Instruments Corporation 8-21 NI USB-621x User Manual
Figure 8-21 shows an example of a buffered two-signal edge-separation
measurement.
Figure 8-21. Buffered Two-Signal Edge-Separation Measurement
For information about connecting counter signals, refer to the Default
Counter/Timer Pinouts section.
Counter Output Applications
Simple Pulse Generation
Single Pulse Generation
The counter can output a single pulse. The pulse appears on the Counter n
Internal Output signal of the counter.
You can specify a delay from when the counter is armed to the beginning
of the pulse. The delay is measured in terms of a number of active edges of
the Source input.
You can specify a pulse width. The pulse width is also measured in terms
of a number of active edges of the Source input. You also can specify the
active edge of the Source input (rising or falling).
SOURCE
Counter Value
Buffer
AUX
GATE
1 2 3 1 2 3 1 2 3
3 3
3
3
3
3

National Instruments USB-621 Series Specifications

General

Brand	National Instruments
Model	USB-621 Series
Category	Measuring Instruments
Language	English