multiple trigger sources digital I/O card

[svt4cobra6]

I am using the NI-HSDIO Express (Acquisition) with the high speed digital I/O card (pxi 6542) for a logic analyzer.  It is working fine but I need to use more than 1 trigger source, for example when 3 signals go high (rising edge), capture data.  I did not see a way to do this within the HSDIO Express properties window, any ideas thanks? 

[DJ_L. · Accepted solution]

Hey svt4cobra6,

I would recommend that you first check out the Triggers Summary page in the HSDIO Help, and I think you will want to use a Pattern Match Trigger. Then you should check out the Pattern Match Start Trigger (or similar C reference) specific help. This trigger allows you to use a Data Line to look at multiple trigger sources at one time. So if you have extra data lines, then use 3 of them and use the "R" or "r" in your pattern match start trigger. For example your pattern to match 3 data lines when there is a rising edge on the 3 lines at the same time might look something like this, where "x" is don't care:

"xxxx xxxx xxxx xxxx xRRR"

Hope this helps.

Regards,

DJ L.