National Instruments NI USB-621x User Manual

Chapter 9 Counters
© National Instruments Corporation 9-25 NI USB-621x User Manual
frequency of the system. Figure 9-28 shows an example of pulse generation
for ETS; the delay from the trigger to the pulse increases after each
subsequent Gate active edge.
Figure 9-28. Pulse Generation for ETS
For information about connecting counter signals, refer to the Default
Counter/Timer Pinouts section.
Counter Timing Signals
USB M Series devices feature the following counter timing signals.
• Counter n Source
• Counter n Gate
• Counter n Aux
• Counter n A
• Counter n B
• Counter n Z
• Counter n Up_Down
• Counter n HW Arm
• Counter n Internal Output
• Counter n TC
•Frequency Output
In this section, n refers to either Counter 0 or 1. For example, Counter n
Source refers to two signals—Counter 0 Source (the source input to
Counter 0) and Counter 1 Source (the source input to Counter 1).
OUT
D1 D2 = D1 + ΔD D3 = D1 + 2ΔD
GATE

National Instruments NI USB-621x Specifications

General

Brand	National Instruments
Model	NI USB-621x
Category	Computer Hardware
Language	English