National Instruments 321645c-01

Chapter 2 Function Reference — CTR_Pulse

NI-DAQ FRM for PC Compatibles 2-102

National Instruments Corporation

Pulse Generation Timing Considerations

Figure2-9 shows pulse generation timing for both the TC toggled output and TC pulse output

cases. These signals are positive polarity output signals.

Figure 2-9. Pulse Generation Timing

An uncertainty is associated with the delay period due to counter synchronization. Counting

starts on the first timebase edge after NI-DAQ applies the starting signal. The time between

receipt of the starting pulse and start of pulse generation can be between (delay) and

(delay+ 1) units of the timebase in duration.

0 < sync period < 1

Timebase

Starting

Signal

TC Toggle

Output

TC Pulse

Output

units = timebase period

- 1

delay pulse_width

delay- 1 pulse_width- 1