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  486   Tue Mar 22 12:54:41 2016 Stefan Ritt 

Yes this is correct. But it is a sample-and-hold circuit. So the sampling cell follows the input for 3.2 ns, then samples and holds the current value at the end of the period.

Dominik Neise wrote:

Hello Stefan,

I just stumbled again over a phrase in the DRS4 datasheet I never really understood, but didn't find the time to ask.

On page 8 it says: "An internal circuit ensures that the write signal is always 16 cells wide."

So when I look at a single channel, do I understand correctly, that at any given time during sampling, always 16 cells are open, i.e. 16 cells are connected to the analog inputs? So when the domino frequency is e.g. 5GHz then each cell sees the analog input not for 200ps but for 3.2ns correct?

 

  541   Thu Oct 6 15:23:18 2016 Will Flanagan 

Hi Stefan,

That is exactly what I'm looking for. Thanks again!

Will

  698   Thu Jun 7 16:27:21 2018 Phan Van Chuan 

Dear Stefan,

I am using an DRS4 board to test the signal from an scintillator detector; It has connected well to the computer on DRS Oscilloscope (Figure 1). Now, I am having a problem of developing from the code of the drs_exam program, because the DRS4 board has not connected to the computer when translation the drs_exam program (Figure 2). Before running the drs_exam program, I copied the libusb-1.0.lib file to the computer's "C: \ Program Files \ Microsoft SDKs \ Windows \ v7.0A \ Lib" folder. Can you show me how to solve this problem?

 

Figure 1.

 

Figure 2.

Thank you very much!

Best Regards,

Chuan

  699   Fri Jun 8 08:11:05 2018 Stefan Ritt 

Several people reported this problem, but we cannot reproduce it at our lab. Both the oscilloscope and the command line interface use exactly the same code to connect to the board. Have you tried the solution reported here: elog:657 ?

Best,

Stefan

Phan Van Chuan wrote:

Dear Stefan,

I am using an DRS4 board to test the signal from an scintillator detector; It has connected well to the computer on DRS Oscilloscope (Figure 1). Now, I am having a problem of developing from the code of the drs_exam program, because the DRS4 board has not connected to the computer when translation the drs_exam program (Figure 2). Before running the drs_exam program, I copied the libusb-1.0.lib file to the computer's "C: \ Program Files \ Microsoft SDKs \ Windows \ v7.0A \ Lib" folder. Can you show me how to solve this problem?

 

Figure 1.

 

Figure 2.

Thank you very much!

Best Regards,

Chuan

 

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