To get impulse response from 8753ES VNA

[yveshsu]

Hi guys,

I am a newbie in Labview.  I operated the 8753ES VNA following the below steps to get impulse response.

System (Hardkey) >> Transform Menu (Softkey) >> Low pass Impulse response

Recently I tried to use 8753ES instrument driver to develop a front panel in Labview but I couldn't get it.

I will appreciate if somebody can give a help.

Thanks.

[Dennis_Knutson]

Since no one has access to your c drive, your images are not viewable. Attach them just like you did the png.

[Chris_VH]

Well, Dennis has a good point that we can't see your images, but even if we could, could you better elaborate?

What do you mean you are trying to develop a front panel with an instrument driver? You are just having troubles making controls that go to the instrument VIs? If you could explain a little more, we could probably help you a little more 🙂

Message Edited by Chris_VH on 03-06-2009 09:52 AM

[yveshsu]

Thanks, Dennis and Chris!

I think I didn't describe my problem clearly, but I fixed the part of syntax errors last night. Please refer to the .png file where I circled it, but I would like to know if I can improve my codes more efficient for this example.

What I am trying to do is to collect the data of impulse response and frequency response simultaneously. Thus, I modified the VI (HP8753 Collect and Display Data.vi) in the 8753ES instrument driver to make this module save data in the same file when I run it in a loop. I also made another sub VI do the same thing. I know it is a sort of stupid but if I use the same sub VI twice, I won't be able to save them individually. Please refer the file 8753measurement.vi. However, it sometimes shows me error code (–1073807339:Timeout expired before operation completed). I am still debugging it. Do you have any suggestions?

By the way, I forgot to say that I saved both data (impluse response and frequency response) in different files but somehow I found the data of impulse response that exist in the file of frequency response.

Initial condition:

Loop:10

Delay time:30000ms

Format: log magnitude

Data type: 6 formatted data

Result:

After 10 time measurement, I found the data in the wrong place twice.  

[Coq_Rouge · Accepted solution]

Hi

If you have collected the impulse response, you may apply the FFT function to this result, and get the frequency respons. It is quite simple se this picture http://forums.ni.com/ni/attachments/ni/170/391616/1/sample.PNG . But I guess your job is to download this information from the AGILENT 8753ES