My Labview (Rev8.5) program works fine with E4440A & 89600A VSA software through COM API on 802.11a/g/n EVM tests. But recently we got another E4440A & 89601B VSA license which changed interface from COM API to .NET API. Now my test software doesn't work on this set up anymore. I was trying to modify the Labview code to use the .NET API that 89601B VSA provided but encountered some issues. First I placed a .NET constructor in Labview block diagram and tried to select the assembly. According to the Help files, "the .NET API is located in %PROGRAMFILES%\Agilent\89600B VSA xx.y\89601B\VSA\Interfaces for .NET 4.0", and "In the 89600B VSA .NET API, you need to add a reference to the Agilent.SA.Vsa.Interfaces Assembly of the version you wish to use. You then call ApplicationFactory.Create() in order to get a handle to the Application Class". But when I actually selected the ApplicationFactory in the Labview .Net assembly selection window, it said :"There is no public class in this assembly ". Why? Has anyone actually used .NET API with Labview to control 89600B VSA? Could you share the experience? By the way a comment in the 89600B Help file is " a backwards-compatibility COM (BWCC) API is provided with the 89600B VSA", does this means that I can actually still use my current Labview code without changing them, by simply registering the B version as the current COM server? Your help is greatly appreciated. Thanks, George

ni.com is currently undergoing scheduled maintenance.

Some services may be unavailable at this time. Please contact us for help or try again later.

LabVIEW

Use 89600B VSA .NET API in LabView

Hi Phong,

It seems that others have had simliar questions, and according to my findings, you could use a .NET invoke node, rather than through a .NET constructor. Take a look at the following article that says,"Static methods are not accessed via constructor, but by selecting the method in a stand alone .NET invoke node."

http://lavag.org/topic/13791-when-accessing-a-net-assembly-from-lv-i-cannot-see-public-methods-and-i...

Andy G
Applications Engineering
National Instruments

Message 21 of 22

(563 Views)

Thanks AndyCandy,

I've got it fixed .

Phong

Message 22 of 22

(557 Views)

LabVIEW

Use 89600B VSA .NET API in LabView

Re : Use 89600B VSA .NET API in LabView

Re : Use 89600B VSA .NET API in LabView