Triggering using STRTTRIG Pins of 6534.

[dhruvish]

Hello,

I have some questions regarding triggering of 6534 cards. I have two 6534 and one 6110E card. I want 6534 to operate in Pattern I/O mode. Here is the scenario.

All clocks are externally supplied to REQ1/REQ2 pins of 6534s, and to PFI6 pin of 6110E board. Now, data acquisition does not start yet. For that, I need to trigger all these boards at the same time.

1. Can I supply a trigger generated by LabView from 6534 Board#1's STRTTRIG1 pin to STRTTRIG2 pin of it and STRTTRIG1-2 of 6534 Board#2 and TRIG0 of 6110E. So STRTTRIG1 of 6534 Board#1 will be acting as an output pin, supplying trigger to all other boards.

2. If this is not possible, please suggest any other way to trigger all three boards at the same time.

[George M.]

RTSI is the best way to synchronize multiple DAQ devices.
You can use one single RTSI cable to connect all three DAQ devices together. The way to code that is also simple, you can call Route Signal.vi, if in Labview, or Select Signal, if using NI-DAQ function calls. You will need to have multiple calls of those functions, in a way that you route the signal from the master board to a specific RTSI line, and then to have two more calls, to catch and route the same RTSI line you used before, to the signals of interest on the other two boards.

Hope this helps!