x axis scale in waveform graph

[gireesh]

Hai

I need to know about that, how to change X axis scale range upto 10000 or more?

In my plotter x-axis is showing 100 max. Instead of time I used frequency. so I want to increase the scale.

I disabled auto scale and changed to 10000, even after the data is going beyond 100 and the graph is shrinking upto 100, the frequency not moving beyond 100. I used logrithimic change. i think there is a limit in X axis and it cannot change.

10000 is showing in X axis but the data is not going? what will do? I need help on this, PLEASE 

[mishkin]

It would probably help if you post your VI here and let us take a look at it.

[gireesh]

[Dennis_Knutson]

I don't see any VIs attached. All I see are some files with some images and some express VIs that are not getting the correct information (i.e. timing/frequency info).

Message Edited by Dennis Knutson on 03-16-2010 11:29 AM

[gireesh]

hello

I am sorry. It is in my office. This much only I can get . I will try to take out from my office. It is due to so many things are restricted in my office such as pen drive, CDs, mobile phones etc. This images are secretly send to my email.

Next day I will try. 

[gireesh]

hello sir

For each setting there is some GPIB commands which are given by the FRA manufactures. When we are entering in the front panel, the values will loaded in the FRA and it will start running when we are run the *.vi.

In the front panel image the freq(x-axis) showing 1000 only. This 1000 also showing wrong only. When the data will come beyond 100, the graph will shrink and the gain and phase plot will show nearer to this 100 max only.

In some tests I need to go to 10000 max freq.

There is no timing required (I think) for this operation. Timing is needed only for Read Visa. default is 2000 but i changed to 1000.

Message Edited by gireesh on 03-16-2010 11:17 PM

[gireesh]

hello

I attached my FRA.vi

please go through it and give a solution for the problem

[Dennis_Knutson]

You are making some fundamental errors. First, you configured the Collector functions for 1000 samples. How can you plot 10000 samples when you have this setting? Second, as I mentioned, you have not provided the xaxis with any timing information. The default dt of a graph is one and your 'Hz' label is meaningless. It would seem to me that if you want frequency as the xaxis, you need to be using an XY Graph.

Message Edited by Dennis Knutson on 03-17-2010 09:14 AM

[gireesh]

Hello sir

Thank you for your response and the explanation.

I need to tell you something that (if it is wrong please forgive me?) 

The Hz label is not meaningless because I need magnitude and phase plot with respective to the frequencies. As compared to the frequencies what happend to the magnitude and phase, that only I need to know. may be in waveform graph , it is meaning less. But frequency is necessary.

I didn't think so much  about the collector functions for 1000 samples. Even 1000 also not getting, are you tried?

This graph is created from waveform graph and the secondary axxis is made from the y axis as duplicate and swaped.

Now I need to know about the  difference between waveform graph and xy graph and i will try it.

Thank you sir 

[Dennis_Knutson]

The labels on all axis are just text and your's is meaningless in the sense that it has no relationship to 'Hz'. You may want to have that as Hz but it is not. It is just the number of points that you write.