trigger oscilloscope lt354m

[giacomourbini]

Sorry but can anyone help me? I really need your help. Maybe I didn't express myself well so I try to summarize again what I'm trying to achieve:

I have an oscilloscope which triggers N times (i don't know what is N) but every times it triggers the oscilloscope acquire the signal. So every times the oscilloscope made an aquisition I want to save the data until the last aquisition comes and then stop the program. I don't know which command I need and how to put it in the program. If you can help me I'll be very grateful

Thanks in advance

[billko]

Hey, let's start from the basics.  How is your scope connected to the computer?  Is the scope set up to use that interface?

[giacomourbini]

GPIB connection and yes the scope is setting up to use that interface. But actually I have already created a program which sets up the oscilloscope (timebase, vertical setup, trigger) and then there's a while loop to plot the channel into a graph and I have also built the part to save the data. But with this code I save all the data until I decide to stop the loop (with a control) and what I want is something that acquire data only when there's a trigger and so when the oscilloscope have an acquisition. And the while loop should stop when there are no more acquisitions.

[billko]

Actually you should copy that VI and try to modify it to suit your needs.  If you could post the VI you are refering to, maybe together we can get to where you need it to be.

[giacomourbini]

Actually I did what you said but no progress. Anyway I will attach the .vi here. Hope you can really help me because I really need to finish it asap.

[billko]

I downloaded the drivers for this device. I've attached a proof-of-concept version of your try.vi. Your attempt follows closely the example provided, but has no indicator on the waveform output! I replaced your loop exit control logic with a simple stop button for now, and placed a simple indocator on the output to verify that you are getting something. (I have no idea if this even works.)

These drivers are very old and cumbersome. I'm uploading more recent drivers that I found. They are at least in lvlib format. They also include extensive example, of which you might even be able to use the "loop" one without modification.

[giacomourbini]

Thank you. Really appreciate that you're trying to help me.

Anyway now I can't test the new drivers cause I haven't the scope at home but just to be sure, I don't have to work with the remote control of the scope, do I?

Because maybe in the new drivers there are some options which do what I want to achieve.

[billko]

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@giacomourbini wrote:

Thank you. Really appreciate that you're trying to help me.

Anyway now I can't test the new drivers cause I haven't the scope at home but just to be sure, I don't have to work with the remote control of the scope, do I?

Because maybe in the new drivers there are some options which do what I want to achieve.

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LOL I don't exect you to be trying them out today.  😉

[Dennis_Knutson]

You don't want to work with the remote control of the scope? Why use LabVIEW?

[billko]

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@Dennis_Knutson wrote:
You don't want to work with the remote control of the scope? Why use LabVIEW?

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I think he meant "from home."