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Chapter 2 Function Reference — Select_Signal
NI-DAQ FRM for PC Compatibles 2-378
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National Instruments Corporation
signal = ND_IN_SCAN_CLOCK_TIMEBASE
Use ND_IN_SCAN_CLOCK_TIMEBASE as an input into the DAQ-STC scan timer. The scan
timer generates timing by counting the signal at its input, and producing an
IN_START_SCAN
signal after the specified number of occurrences of the
ND_IN_SCAN_CLOCK_TIMEBASE
signal transitions.
If you do not call this function with signal =
ND_IN_SCAN_CLOCK_TIMEBASE, NI-DAQ uses
the default values, source =
ND_INTERNAL_20_MHZ and sourceSpec = ND_LOW_TO_HIGH.
signal =
ND_IN_CHANNEL_CLOCK_TIMEBASE
Use
ND_IN_CHANNEL_CLOCK_TIMEBASE as an input into the DAQ-STC sample (channel
interval) timer. The sample timer generates timing by counting the signal at its input, and
producing an
ND_IN_CONVERT signal after the specified number of occurrences of the
ND_IN_CHANNEL_CLOCK_TIMEBASE signal transitions.
If you do not call this function with signal =
ND_IN_SCAN_CLOCK_TIMEBASE, NI-DAQ uses
the default values, source =
ND_INTERNAL_20_MHZ and sourceSpec = ND_LOW_TO_HIGH.
signal =
ND_OUT_START_TRIGGER
source sourceSpec
ND_PFI_0 through ND_PFI_9 ND_LOW_TO_HIGH and ND_HIGH_TO_LOW
ND_RTSI_0 through ND_RTSI_6 ND_LOW_TO_HIGH and ND_HIGH_TO_LOW
ND_INTERNAL_20_MHZ ND_LOW_TO_HIGH
ND_INTERNAL_100_KHZ ND_LOW_TO_HIGH
source sourceSpec
ND_PFI_0 through ND_PFI_9 ND_LOW_TO_HIGH and ND_HIGH_TO_LOW
ND_RTSI_0 through ND_RTSI_6 ND_LOW_TO_HIGH and ND_HIGH_TO_LOW
ND_INTERNAL_20_MHZ ND_LOW_TO_HIGH
ND_INTERNAL_100_KHZ ND_LOW_TO_HIGH
source sourceSpec
ND_PFI_0 through ND_PFI_9 ND_LOW_TO_HIGH and ND_HIGH_TO_LOW
ND_RTSI_0 through ND_RTSI_6 ND_LOW_TO_HIGH and ND_HIGH_TO_LOW
ND_IN_START_TRIGGER ND_LOW_TO_HIGH