USB 6008 trigger

[star-123]

Hi everbody,

I am using USB 6008. I would like that analog input signal  is triggered. For this, the square signal is sent to PFI input. But analog input signal is not triggered. For trigger, what can I do? what is the proporties of PFI input signal?

Thank you for your help

[Norbert_B]

The PFI0 expects a digitial trigger signal, which usually refers to a TTL based signal type. You have to configure the trigger in your acquisition application.

So if you are confident that the trigger itself is correct from specification point of view, please attach the VI so we can see what you implemented softwarewise.

Norbert

[GerdW]

Hi 1085,

did you read the manual for the USB6008, especially page 21 handling the PFI0 input and the trigger options it provides for your DAQ hardware?

After doing so you just open the example VIs coming with LabVIEW and DAQmx to test them with your USB6008…

[star-123]

the square signal is generated from 0V to 5 V by function generator function. Then it is sent to PFI0.  Is it work? 

Thank you for reply

[GerdW]

Hi 1085,

when your function generator provides a TTL signal it will work…

Then just read the manual as suggested before and try the example VIs coming with LabVIEW!

[star-123]

Hi GerdW,

I read manual. My function generator have not got a TTL output. So, I use waveform generation from LabVIEW functions for trigger signal. Square signal is generated by waveform generation and send to PFI0. But is not triggering. what do you suggest for PFI0 input signal? 

Thank you for reply.

[Dennis_Knutson]

What sort of function generator cannot output a 5 volt signal?

The 6008 cannot use a waveform as an output so your comment does not make much sense. Why not use a simple digital output if you don't want to use the signal generator? Why generate a trigger in LabVIEW at all when you can simply command a read?

[star-123]

Please send me VI, how is generated digital signal to send from 6008 digital output to PFI0?

Thank you.

[James.M]

This might work:

[GerdW]

Hi James,

nice example!

You put a lot of effort into this little gem! 😉