Using rtsi terminals as timing input signals, Rtsi filters – National Instruments Network Device DAQ S User Manual
Page 126
Chapter 9
Digital Routing and Clock Generation
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ni.com
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Counter n Source, Gate, Z, Internal Output
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Change Detection Event
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Analog Comparison Event
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FREQ OUT
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PFI <0..5>
Note
Signals with a * are inverted before being driven on the RTSI terminals.
Using RTSI Terminals as Timing Input Signals
You can use RTSI terminals to route external timing signals to many
different S Series functions. Each RTSI terminal can be routed to any of the
following signals:
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AI Convert Clock (ai/ConvertClock)
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AI Sample Clock (ai/SampleClock)
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AI Start Trigger (ai/StartTrigger)
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AI Reference Trigger (ai/ReferenceTrigger)
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AI Sample Clock Timebase (ai/SampleClockTimebase)
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AO Start Trigger (ao/StartTrigger)
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AO Sample Clock (ao/SampleClock)
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AO Sample Clock Timebase (ao/SampleClockTimebase)
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AO Pause Trigger (ao/PauseTrigger)
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Counter input signals for either counter—Source, Gate, Aux,
HW_Arm, A, B, or Z
•
DI Sample Clock (di/SampleClock)
•
DO Sample Clock (do/SampleClock)
Most functions allow you to configure the polarity of PFI inputs and
whether the input is edge or level sensitive.
RTSI Filters
You can enable a programmable debouncing filter on each PFI, RTSI, or
PXI_STAR signal. When the filters are enabled, your device samples the
input on each rising edge of a filter clock. S Series devices use an onboard
oscillator to generate the filter clock with a 40 MHz frequency.
Note
NI-DAQmx only supports filters on counter inputs.