Prev: Simulink
Next: bug with matlab and Fsolve
From: Wei He on 11 Jun 2010 10:58
Helo!
I am using the Instrument Control Toolbox to transfer the power traces in order to make some analysis on matlab.
However, I am confused about the Agilent Oscilloscope's segmented memory.
because, when I set the number of segment as 200 and the sample number/seg as 5000, i could get 200 segs with 5000 points/segment. But, when I set the number of seg as 400, the sample number/seg is automatically reduced to 4444. I searched some bulletins here, and got some clues that the number of segs has priority over the sample points/seg. Osci will automatically reduce the sampling number to match the maximum intermal memory. However, when i increase the number of seg to 2000, the sample point number /seg is automatically reduced to 2857. it's strang because

400 seg * 4444 sam/seg != 2000 seg * 2857 sam/seg ??
(I didn't change the time division, it's always 2.00us/division)
What principle that agilent osci follows to distribute memory to each segmented memory?

who could offer some hint or explanation? Thank you very much~!!

Regards!
Wei
From: Vinod Cherian on 11 Jun 2010 15:13
"Wei He" <Eric.he(a)hotmail.com> wrote in message <hutitt$dui$1(a)fred.mathworks.com>...
> Helo!
> I am using the Instrument Control Toolbox to transfer the power traces in order to make some analysis on matlab.
> However, I am confused about the Agilent Oscilloscope's segmented memory.
> because, when I set the number of segment as 200 and the sample number/seg as 5000, i could get 200 segs with 5000 points/segment. But, when I set the number of seg as 400, the sample number/seg is automatically reduced to 4444. I searched some bulletins here, and got some clues that the number of segs has priority over the sample points/seg. Osci will automatically reduce the sampling number to match the maximum intermal memory. However, when i increase the number of seg to 2000, the sample point number /seg is automatically reduced to 2857. it's strang because
>
> 400 seg * 4444 sam/seg != 2000 seg * 2857 sam/seg ??
> (I didn't change the time division, it's always 2.00us/division)
> What principle that agilent osci follows to distribute memory to each segmented memory?
>
> who could offer some hint or explanation? Thank you very much~!!
>
> Regards!
> Wei

Wei,

As I understand it, all settings are finally dependent on the available hardware memory on the scope. Some of these properties you mention are coupled based on that aspect.

I believe that you will get better information from Agilent technical support on how the scope sets the coupled parameters. As there are users on this newsgroup who are doing things similar to you, it would be helpful if you post what you find here for the benefit of everyone.

-Vinod
 | 
Pages: 1
Prev: Simulink
Next: bug with matlab and Fsolve