National Instruments Data Acquisition Device E Series - Manual (Page 75)

Chapter 2 Analog Input
E Series User Manual 2-42 ni.com
Using an External Source
You can use a signal connected to any PFI or RTSI <0..6> pin as the source
of ai/ConvertClock. Figure 2-29 shows the timing requirements of the
ai/ConvertClock source.
Figure 2-29. ai/ConvertClock Source Timing Requirements
Outputting the AI Convert Clock Signal
You can configure the PFI 2/AI CONV CLK pin to output the
ai/ConvertClock signal. The output pin reflects the ai/ConvertClock signal
regardless of what signal you specify as its source.
Figure 2-30 shows the timing of behavior of the PFI 2/AI CONV CLK pin
configured as an output.
Figure 2-30. PFI 2/AI CONV CLK Timing Behavior
The PFI 2/AI CONV CLK pin is configured as an input by default.
Rising-Edge
Polarity
Falling-Edge
Polarity
t
w
= 10 ns minimum
t
w
t
w
= 50 to 150 ns
t
w