cDAQ 9172 Input Question

[Anigma]

Still no idea how to mimic the signal. I need to put some extra circuit to mimic it(before go into analog module) or just mimic it in LABview?

Say i choose to use NI9201 analog input module.could you give some clue ?Atleast some idea how the thing works?

If I just connect the signal 5V square pulse to AI1 of NI9201,what should I expect from the LABview?

[Anigma]

Now the most important thing is I need to decide which module can be use, so i can place the connector on the circuit, send it for PCB routing( cos it take time for PCB to come out). 

[Anigma]

Just have an idea, Use NI9201 to measure the voltage.then use something like Trigger Counter.vi  whenever the signal cross say +2.5V increase a count. Is the idea sound fine?Can NI9201 do the task?

(Actually, couldnt i direct plug the TTL 5V pulse to COM port, and let LABview to count it?  )

[KyleBryson]

Hi Anigma,

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@Anigma wrote:

?Atleast some idea how the thing works?

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You'll have to post some more specific questions in order for me (or anyone else) to provide helpful answers; the documentation explains a good deal about the module, running the examples (with real or simulated hardware) shows what kind of data the return, and the software, both DAQmx and LabVIEW, has extensive documentation.  There's also a great deal of information on ni.com and other websites.

Trigger Counter.vi looks like a great example for you to start with.  Try creating simulated devices for your system in Measurement and Automation Explorer and test out your application.

The COM terminal should be connected to the ground reference of your circuit.  I don't understand the associated question.

Regards,
Kyle