Startscan signal, Figure 4-16. trig2 input signal timing, Figure 4-17. trig2 output signal timing – National Instruments E Series User Manual
Page 66: Startscan signal -30
Chapter 4 Signal Connections
DAQCard E Series User Manual
4-30
National Instruments Corporation
Figures 4-16 and 4-17 show the input and output timing requirements
for the TRIG2 signal.
STARTSCAN Signal
Any PFI pin can externally input the STARTSCAN signal, which is
available as an output on the PFI7/STARTSCAN pin.
Refer to Figures 4-10 and 4-11 for the relationship of STARTSCAN to
the data acquisition sequence.
As an input, the STARTSCAN signal is configured in the
edge-detection mode. You can select any PFI pin as the source for
STARTSCAN and configure the polarity selection for either rising or
falling edge. The selected edge of the STARTSCAN signal initiates a
Figure 4-16.
TRIG2 Input Signal Timing
Figure 4-17.
TRIG2 Output Signal Timing
Rising-edge
polarity
Falling-edge
polarity
t
w
t
w
= 10 ns minimum
t
w
t
w
= 50-100 ns
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