National Instruments NI 6225 - Page 70

Chapter 4 Analog Input
M Series User Manual 4-26 ni.com
Figure 4-12. Analog Input Timing Options
M Series devices use ai/SampleClock and ai/ConvertClock to perform
interval sampling. As Figure 4-13 shows, ai/SampleClock controls the
sample period, which is determined by the following equation:
1/Sample Period = Sample Rate
Figure 4-13. Interval Sampling
ai/ConvertClock controls the Convert Period, which is determined by the
following equation:
1/Convert Period = Convert Rate
PFI, RTSI
PXI_STAR
Analog Comparison
Event
20 MHz Timebase
100 kHz Timebase
PXI_CLK10
Programmable
Clock
Divider
Programmable
Clock
Divider
ai/SampleClock
Timebase
ai/ConvertClock
Timebase
PFI, RTSI
PXI_STAR
Analog Comparison Event
Ctr
n Internal Output
SW Pulse
PFI, RTSI
PXI_STAR
Analog Comparison Event
Ctr
n Internal Output
ai/ConvertClock
ai/SampleClock
Channel 0
Channel 1
Convert Period
Sample Period