Agilent Scopes

[nicosg]

Hi,Guys,

Anybody working with agilent scope? I have agilent scope 54832D,I use ":WAV : DATA?" fetched  all y-axis data, is there any common can fetch x-axis data. or any other ways to get the data?

otherwise,I need to caculate myself.

Message Edited by nicosg on 10-19-2007 01:34 AM

[Albert.Geven]

Hi nicosg

any scope that I know off has a t0, a delta t and each point is calculated by t0+i*(delta t)
and that is much faster than reading from the scope.
Even faster is to use a waveform chart instead of an x-y graph

[nicosg]

Hi,Albert Geven,

Thanks for your reply,

Does wavefrom x-axis data always start at 0?

I qaury from MAX, I found out all these start at -5.9999324E-4,

x=0 just under triggle point.

so,my x-axis data start at 0, or depends?

whats the relationship with triggle point?

[LaurenLL]

Hi Nicosg,

Thank you for contacting National Instruments.  In order to best help you, I need to clarify a few things.  How exactly are you obtaining and manipulating the data?  Are you using LabVIEW or another program?  How exactly do you want the x-axis to act?

The t0 value defines where the x-axis begins.  If you are using LabVIEW, you can simply use the build waveform function, pulling down the block for more parameters.  The default value of t0 is 0, so if you do not set a value, it will automatically start at 0. 

Do you want the x-axis defined by the real-time value (can be done using "get data/time in seconds" function as the t0 input) or by another parameter?

Let me know exactly what you are trying to do, and the program you want to use, and I can hopefully give you a solution specific to your application.

Regards,

Lauren L.

[Albert.Geven]

Hi Nicosg

indeed normally the x-axis starts at zero but I forgot that a scope can use the triggerpoint to be defined as zero.
Not all scopes use this however nice feature.

Another thing you should beware of is that in the graph you can select an option to ignore t0.

[nicosg]

Hi,Albert Geven,

Thanks for your reply.

My program is too big,2mb, can not attach.

Here is a screen capture of front panel of my program.

[nicosg]

Hi,Albert Geven,

Here is my program, main_outp'' is main program .

[Dennis_Knutson]

You seem to have gone out of your way to make this job as complicated as possible. Why don't you simply download the driver for the scope and use that or at least give it a look.

[nicosg]

Hi,Dennis Knutson,

Thanks for your reply,I have no chooice, I need to write all these my self  for learning,cos I need to re-structure another kind of labview program for this scope.

yes,ivi driver is useful,but not our needs.

what I am trying to do is not only apply this scope,but more on programming.

I am quite new on labview,but need to learn as faster as I can for my re-strcture project.

Thanks again for your pantience.

[Albert.Geven]

Hi

In the case of learning study another agilent scope project library and use that to implement the real driver

e.g. the hp546xxx projectstyle driver for lv8.00