National Instruments DAQ X Series User Manual page 78

Chapter 4 Analog Input
Using an External Source
Use one of the following external signals as the source of AI Convert
Clock:
•
•
•
•
•
Routing AI Convert Clock Signal to an Output Terminal
You can route AI Convert Clock (as an active low signal) out to any
PFI <0..15>, RTSI <0..7>, or PXIe-DSTARC terminal.
All PFI terminals are configured as inputs by default.
Using a Delay from Sample Clock to Convert Clock
When using the AI timing engine to generate your Convert Clock, you also
can specify a configurable delay from AI Sample Clock to the first AI
Convert Clock pulse within the sample. By default, this delay is three ticks
of AI Convert Clock Timebase.
Figure 4-17 shows the relationship of AI Sample Clock to AI Convert
Clock.
AI Convert Clock Timebase
AI Sample Clock
AI Convert Clock
X Series User Manual
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
PFI <0..15>
RTSI <0..7>
PXI_STAR
PXIe-DSTAR<A,B>
Analog Comparison Event (an analog trigger)
Delay from Convert
Sample Period
Clock
Figure 4-17. AI Sample Clock and AI Convert Clock
4-32 ni.com