large binary data readout from scope

[Y3G]

Hi ,

I would like to know how I can readout a large amount of data, 10 MSamples for a Scope trace of 10 us/div and display it on VI.

I am using direct SCPI commands instead drivers, due to the speed I need. After manually configuring the Scope, I run in the loop the following commands

:FORMat:DATA REAL,32    

RUNSingle;*OPC?
:CHANnel1:WAVeform:DATA?

The queried data is in binary format and I don't know how to display it.

If you have any example program that could do it very fast, please share it.

Many thanks in advance

Y3G (...if there is LTE)

[Dennis_Knutson]

The driver would use SCPI so I don't understand your comment. The manual will have an explanation of the conversion and the driver is an example of how to do it. Just open the block diagram. There should be a fetch function.

[crossrulz]

What scope are you using?

As Dennis said, you need to read the manual.  It will tell you what the format of the data coming back is.  I've seen some just spit back 16 bit data that you then have to convert somehow.  Others will give you an actual double precision floating point.  And some have additional data they send with the raw data.

[mikeporter]

One more thing: If the scope is sending you an array of integer values that you need to scale, remember that the math operations in LV are polymorphic so if, for example, you want to multiple an array of integers by a scalar floating point value the standard multiply function will do it. You don't have to index through the array one element at a time.

Mike...

[DFGray]

And last, but not least, if you are reading 10 million samples, it could take awhile and you could run out of memory if you are not careful. Read the LabVIEW help on dealing with large data sets and/or this white paper for how to make things fast and use your memory efficiently.