Measure buffered output signal

[dave6k]

I am using a PCI-6225 to try and take some measurements of a waveform that I generated with the same device. The waveform is generated as a buffered output on port 0, line 0. I want to measure two edge separation between this waveform and another externally generated waveform connected to PFI8. Unfortunately I cannot select port 0, line 0 as a terminal for the two edge separation measurement - it looks like only the PFI terminals support this measurement. But the waveform has to be generated as a buffered output so I can't use any other ports. 

Is there any way to reroute this signal internally to a PFI terminal? Otherwise my thought is that I will have to physically run a wire to connect port 0 line 0 to an unused PFI terminal.

[SunainaK]

Hi dave6k,

You can send the waveform to a RTSI pin, instead of to P0.0. Also, if you are reading the waveform back into your program, how come you are outputting it in the first place?

[dave6k]

Sunaina,

The Digital Output is only allowed on port 0 lines 0-7. There is no option for RTSI terminals and any other port gives an error. I checked the M-Series manual and it states that only PFI 0-5 can be output on RTSI terminals. By the way I am basing my program off the Correlated Digital Write with Counter example in DAQmx (I have multiple digital signals that are being output).

The digital output signal is used as a trigger and I am trying to measure the delay between the output signal and the triggered signal.

[SunainaK]

Hi dave6k,

I found a document which shows you how to find out which pins you can internally route in your device:

http://digital.ni.com/public.nsf/websearch/E539D226A643C1CE8625715E007C23C8