National Instruments DAQ X Series, Руководство пользователя

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Chapter 4 Analog Input
© National Instruments 4-25 X Series User Manual
Figure 4-12. Analog Input Timing Options
MIO X Series devices u se AI Sample Clock (ai/SampleClock) and
AI Convert Clock (ai/ConvertClock) to perform interval sampling. As
Fig
u re 4-13 shows, AI Sample Clock controls the sample period, which is
determined by the following eq u ation:
1/Sample Period = Sample Rate
Figure 4-13. MIO X Series Interval Sampling
AI Convert Clock controls the Convert Period, which is determined by the
following eq
u ation:
1/Convert Period = Convert Rate
PFI, RT S I
PXI_ S TAR
An a log Comp a ri s on
Event
20 MHz Time bas e
100 kHz Time bas e
PXI_CLK10
Progr a mm ab le
Clock
Divider
Progr a mm ab le
Clock
Divider
AI Sa mple Clock
Time bas e
AI Convert Clock
Time bas e
PFI, RT S I
PXI_ S TAR
An a log Comp a ri s on Event
Ctr n Intern a l O u tp u t
S W P u l s e
PFI, RT S I
PXI_ S TAR
An a log Comp a ri s on Event
Ctr n Intern a l O u tp u t
AI Convert Clock
AI Sa mple Clock
100 MHz Time bas e
Ch a nnel 0
Ch a nnel 1
Convert Period
Sa mple Period
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