beautypg.com

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

background image

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