Analog Output Timing Signals
- Updated2024-12-11
- 1 minute(s) read
The cDAQ chassis features the following AO (waveform generation) timing signals.
- AO Sample Clock Signal*
- AO Sample Clock Timebase Signal
- AO Start Trigger Signal*
- AO Pause Trigger Signal*
Refer to the related topic links below for more information about the configuration of these signals.
Signals with an * support digital filtering. Refer to the PFI Filters section for more information.
Related Information
- AO Sample Clock Signal
- AO Sample Clock Timebase Signal
The AO Sample Clock Timebase (ao/SampleClockTimebase) signal is divided down to provide a source for AO Sample Clock. AO Sample Clock Timebase can be generated from external or internal sources, and is not available as an output from the chassis.
- AO Start Trigger Signal
Use the AO Start Trigger (ao/StartTrigger) signal to initiate a waveform generation. If you do not use triggers, you can begin a generation with a software command. If you are using an internal sample clock, you can specify a delay from the start trigger to the first sample. For more information, refer to the NI-DAQmx User Manual.
- AO Pause Trigger Signal
Use the AO Pause Trigger signal (ao/PauseTrigger) to mask off samples in a DAQ sequence. When AO Pause Trigger is active, no samples occur, but AO Pause Trigger does not stop a sample that is in progress. The pause does not take effect until the beginning of the next sample.
- PFI Filters
You can enable a programmable debouncing filter on each PFI signal. When the filter is enabled, the chassis samples the inputs with a user-configured Filter Clock derived from the chassis timebase. This is used to determine whether a pulse is propagated to the rest of the circuit. However, the filter also introduces jitter onto the PFI signal.