Analog Input Timing Signals - National Instruments DAQ X NI 634 Series User Manual

Chapter 4 Analog Input

Analog Input Timing Signals

In order to provide all of the timing functionality described throughout this section, MIO
X Series devices have a flexible timing engine. Figure 4-12 summarizes all of the timing options
provided by the analog input timing engine. Also refer to the
Digital Routing and Clock
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:
4-22 | ni.com
Generation.
Figure 4-12. Analog Input Timing Options
AI Sample Clock
Timebase
AI Convert Clock
1/Sample Period = Sample Rate
Figure 4-13. MIO X Series Interval Sampling
Channel 0
Channel 1
1/Convert Period = Convert Rate
Clock Routing
Analog Comparison Event
Ctr n Internal Output
Programmable
Clock
Divider
Analog Comparison Event
Ctr n Internal Output
Programmable
Timebase
Clock
Divider
Convert Period
Sample Period
section of Chapter 9,
PFI, RTSI
PXI_STAR
AI Sample Clock
SW Pulse
PFI, RTSI
PXI_STAR
AI Convert Clock