© National Instruments | 5-25NI cDAQ-9181/9184/9188/9191 User ManualSingle Pulse Generation with Start TriggerThe counter can output a single pulse in response to one pulse on a hardware Start Trigger signal.The pulse appears on the Counter n Internal Output signal of the counter.You can specify a delay from the Start Trigger to the beginning of the pulse. You also can specifythe pulse width. 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 activeedges of the Source input. You can also specify the active edge of the Source input (rising andfalling).Figure 5-27 shows a generation of a pulse with a pulse delay of four and a pulse width of three(using the rising edge of Source).Figure 5-27. Single Pulse Generation with Start TriggerPulse Train GenerationRefer to the following sections for more information about the cDAQ chassis pulse traingeneration options:• Finite Pulse Train Generation• Retriggerable Pulse or Pulse Train Generation• Continuous Pulse Train Generation• Buffered Pulse Train Generation• Finite Implicit Buffered Pulse Train Generation• Continuous Buffered Implicit Pulse Train Generation• Finite Buffered Sample Clocked Pulse Train Generation• Continuous Buffered Sample Clocked Pulse Train GenerationFinite Pulse Train GenerationThis function generates a train of pulses with programmable frequency and duty cycle for apredetermined number of pulses. With cDAQ chassis counters, the primary counter generatesthe specified pulse train and the embedded counter counts the pulses generated by the primarycounter. When the embedded counter reaches the specified tick count, it generates a trigger thatstops the primary counter generation.SOURCEGATE(Start Trigger)OUT
