HP 3589a network analyzer labview driver

[RMZ450...]

Hi J...

   I came across this old post and use your LV program to grab data from a HP3589A... However, it does not give you the matching frequency data.... Is there another, vi to do that?

Thanks for your help.

[Joe_H]

Unfortunately I have not got around to building a driver for this instrument. I have supplied all of the VI's thay I have written. The grabit program would be your best bet. The only thing that this program does is get the data from the analyser and plot it. It does not care what the data is. if it is not giving you the correct data then change the trace or mod the VI. If you have the programmers manual then you should be able to get what you want by using the SCPI and GPIB commands for the instrument. If you could be more specific as to what you are trying to do then maybe I could help you more.

[RMZ450...]

Thanks Joe... What I trying to do is download my frequency response data that is currently displayed on the machine, save it in an excel file and redraw the plot in excel... So far the program works great... However, it only pull out the Gain data and not the Frequency data..

I need both the frequency data  and the Gain data to correctly show my -3dB point in excel... I have looked thur all the GPIB commands and I can't find any commands that could do this.... Hope this is clear...

Thanks...

[Joe_H]

Which trace is your frequency data on. Is it on the same trace as the gain data. Is it on trace A and the other in trace B?

[RMZ450...]

It's on Trace B... the same trace as the Gain data....

[Joe_H]

Do you have the programmers manual? Are you trying to do either a Smith chart or a polar?

[Joe_H]

I was looking into the VI for you (Yuckie old stuff) It looks as if the vi is looking for specific information that we have saved on a disk and some other math setup that we have on a disk as well. What exactly is it that you want. Try changing the VI to not look fo these and to just grab whatever is on the trace. you could also try just using the get data vi and the convert data vi. and see what that gives you. All this does is just grab the trace info. It should be in the zip file that I attached.

[RMZ450...]

Hi Joe,

   Thanks for all your help I was able to get what I need thru math.....

Thanks again...

[Joe_H]

I am glad that I could help. How exactly did you fix your problem. Could you post what you did so that others will know what to do in the future.

[RMZ450...]

Using the Start Frequency, the Stop frequency and the number of point taken, I was able to recreate my x-axis....

                                  log (Stop Frequency in Hz) - log (Start Frequency in Hz)

           x  =  antilog    ----------------------------------------------------------------------------

                                                                          number of points

This gives you the incremental value for your Start to Stop, then you do 10^x....