PCI-DAS6052 User's Guide
Functional Details
A/D START TRIGGER signal
Use the A/D START TRIGGER signal for conventional triggering (when you only need
to acquire data after a trigger event).
shows the A/D START TRIGGER
signal timing for a conventionally triggered acquisition.
Figure 4-3
Figure 4-3. Data Acquisition Example for Conventional Triggering
A/D Start Trigger
Start Scan
Convert
1
2
3
4
0
Scan Counter
The A/D START TRIGGER source is programmable and may be set to any of the
AUXIN inputs or to the DAQ-Sync DS A/D START TRIGGER input. The polarity of
this signal is also programmable to trigger acquisitions on either the positive or negative
edge.
The A/D START TRIGGER signal is also available as an output and can be
programmed to appear at any of the AUXOUT outputs. See
and
for A/D START TRIGGER input and output timing requirements.
Figure 4-4
Figure 4-4. A/D START TRIGGER Input Signal Timing
Figure 4-5
Figure 4-5. A/D START TRIGGER Output Signal Timing
Rising Edge Polarity
t
w
t
w
= 37.5 ns minimum
Falling Edge Polarity
t
w
t
w
= 50 ns
4-6
