trigger oscilloscope lt354m

[billko]

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@Dennis_Knutson wrote:
It's not really a question of LabVIEW. It's understanding instrument communication. The VISA test panel in MAX is not using LabVIEW.

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I don't think it's even a question of instrument communications right now.

Do you actually know how to set this up manually?

[giacomourbini]

Actually no.

I'm sorry

[Dennis_Knutson]

Do you mean you don't know how to sit in front of the scope and know which knobs and buttons to use to acquire a signal or that you can do that but the signal is not acquired?

[giacomourbini]

It could be funny but fortunately I still can do this.
Just to be clear I have also set up all the things manually but I'm still searching for a command which recognizes when the oscilloscope triggers. Because I don't know when the trigger comes and how many triggers there will be. So I want to create a .vi which recognizes when the trigger comes, then save the data and when the last trigger comes, save the data and stop the program.
Hope to be clear

[billko]

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@giacomourbini wrote:
It could be funny but fortunately I still can do this.
Just to be clear I have also set up all the things manually but I'm still searching for a command which recognizes when the oscilloscope triggers. Because I don't know when the trigger comes and how many triggers there will be. So I want to create a .vi which recognizes when the trigger comes, then save the data and when the last trigger comes, save the data and stop the program.
Hope to be clear

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I'm not sure you have successfully set it up manually.  Can you manually set up your oscope to do a one-shot acqusition?

[giacomourbini]

I set up the trigger to NORMAL so every times the oscilloscope triggers the display changes

[Dennis_Knutson]

So you are afraid to try the opc? query? That will tell you when the acquisition is complete after receiving a trigger. Have you read the manual about the command?

[giacomourbini]

No but the question is that I'm quite sure I'll need something different because I don't need to know when the acquisiton after the trigger is complete. I just want to know when there is a trigger so I can start with saving data and after the last trigger stop the program. I have tried to read something on the manual but I haven't succeeded.

[Dennis_Knutson]

You can't save a thing until the instrument has actually acquired something. The instrument cannot be read until that triggered acquisition is done. Since you won't even try, I'm done with trying to help.

[giacomourbini]

I have tried with that but it seems it doesn't work. But actually I'm not sure to have set it up correctly.

I'll attach the program