Counter Timing Signals - National Instruments NI USB-621x User Manual

Counter Timing Signals

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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.
GATE
OUT
D1
Figure 9-28. Pulse Generation for ETS
For information about connecting counter signals, refer to the
Counter/Timer Pinouts
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).
D2 = D1 + ΔD
section.
9-25
Chapter 9 Counters
D3 = D1 + 2ΔD
Default
NI USB-621x User Manual