National Instruments DAQ X Series User Manual page 71

PFI, RTSI
PXI_STAR
Analog Comparison
Event
20 MHz Timebase
100 kHz Timebase
PXI_CLK10
100 MHz Timebase
MIO X Series devices use AI Sample Clock (ai/SampleClock) and
AI Convert Clock (ai/ConvertClock) to perform interval sampling. As
Figure 4-13 shows, AI Sample Clock controls the sample period, which is
determined by the following equation:
AI Convert Clock controls the Convert Period, which is determined by the
following equation:
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Analog Comparison Event
AI Sample Clock
Timebase
Analog Comparison Event
AI Convert Clock
Timebase
Figure 4-12. Analog Input Timing Options
1/Sample Period = Sample Rate
Channel 0
Channel 1
Figure 4-13. MIO X Series Interval Sampling
1/Convert Period = Convert Rate
4-25
Chapter 4
PFI, RTSI
PXI_STAR
Ctr n Internal Output
SW Pulse
Programmable
Clock
Divider
PFI, RTSI
PXI_STAR
Ctr n Internal Output
Programmable
Clock
Divider
Convert Period
Sample Period
X Series User Manual
Analog Input
AI Sample Clock
AI Convert Clock