Using An External Source; Routing Ai Convert Clock Signal To An Output Terminal; Using A Delay From Sample Clock To Convert Clock - National Instruments PXI-6238 User Manual

finished. It then reloads itself in preparation for the next ai/SampleClock
pulse.

Using an External Source

Use one of the following external signals as the source of ai/ConvertClock:
•
•
•
Note Refer to the NI 6238/6239 Specifications for the minimum allowable pulse width
and the propagation delay of PFI <0..5>.
Routing AI Convert Clock Signal to an Output
Terminal
You can route ai/ConvertClock (as an active low signal) out to any output
PFI <6..9> or RTSI <0..7> terminal.
PFI <0..5> terminals are fixed inputs. PFI <6..9> terminals are fixed
outputs.

Using a Delay from Sample Clock to Convert Clock

When using an internally generated ai/ConvertClock, you also can specify
a configurable delay from ai/SampleClock to the first ai/ConvertClock
pulse within the sample. By default, this delay is three ticks of
ai/ConvertClockTimebase.
Figure 4-12 shows the relationship of ai/SampleClock to ai/ConvertClock.
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Input PFI <0..5>
RTSI <0..7>
PXI_STAR
4-19
Chapter 4 Analog Input
NI 6238/6239 User Manual