Tom Bowman

Hello,

Thank you very much for the info. For now I will run with 1Amp max. if I need to do more before a fix is released then I will use two 2461's and put them in parallel them.

Thanks,
Tom Bowman

Hello Andrea,

Thanks for the response I appreciate it.  I will be operating in both when the test is complete. I am testing an active device. The open circuit voltage will be above 20V (all the way to 100V).  Basically the voltage will be at 100V during the 0A bias and current pulse.

Thanks,
Tom Bowman

Hello,

I am unsure if this is a bug or not so any help here would be appreciated.  I am trying to set a pulse train with the following settings
Function: Current
Bias level: 0A
Delay: 0
Pulse Level: 2A
Off time: 50mS
Pulse width: 1mS
Count: does not matter
Off Time: 50mS
Bias Limit: 100V
Limit: 100V

When I do this I get error 5112 which says that the Pulse bias limit is too high for a source pulse of level of 0A.  However, this only happens if I set the Pulse level to above 1A.  Now looking at the data sheet it looks like I should be able to do a 100V 10A pulse, so this 2A case seems odd that it is giving me this error on the 0A bias level.  What is interesting is if I set the voltage bias limit to 20V the pulse train is created with no issue, in this case the limit for the 2A is set to 100V. So again its weird its telling me its a bias level (0A) issue.

So my questions are as follows:
Should I be able to create the pulse train that I described above?
If not, why can't I? the datasheet seems to point to me being able to do this.
Is this a bug? If so is there a work around that I could implement to get my test working?

Not sure if it matters but I am using firmware version 1.7.3c.

Thanks,
Tom

Hello Afonso,<br> <br> Thank you very much.&#160; I think I figured it out. (which was actually kind of complicated-ish) to convert position number to a centered reference level.&#160; Since it seems that the spectrum mode selected a reference level based on your time domain scale. This value in the manual is based on the scale of dBm. So I needed to convert my value to dBm then convert that to a position number based on the dB/div and V/Div.<br> <br> Thanks,<br> Tom Bowman

Hello Afonso,<br> <br> Thank you very much for responding so quickly. I do have a follow up question about one of the commands.&#160; For the Position command, I don't understand how to use this.&#160; Could you give me some examples on how I set these values.. For example if I am set to dBuv units, with a 10dB/DIV.&#160; How do I make it so that -15dBuV would be in the center of the screen?&#160; It seems like it takes integer based numbers, but it seems to move unexpectively depending on what the scale is.

I am using a MSO58b, I am using the spectrum view and I am remotely controlling the scope using SCIPI commands.&#160; &#160;I read through the manual but I can't seem to find how to set the spectrum reference levels and scale.&#160; I can do this via the scope by using the position knob and scale knob when the spectrum view is selected but I can't figure out how to set them to a specific value using SCIPI commands.&#160; Does anyone know how to set these using SCIPI commands? Any help would be greatly appreciated.