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save two waveforms with a phase shift in DSO9254A

Question asked by Owen002 on Jan 15, 2015
Latest reply on Jan 21, 2015 by algoss

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Hi,

I want to save two sine waveforms with a phase shift coming from two channels. I must save these two waveforms in two separate steps. Can I get the save phase shift in these two saved BIN files?

Senmeis

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algoss Jan 16, 2015 12:34 PM
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As long as the two waveforms were captured from the same trigger, the phase will be preserved. To measure the phase yourself, you will have to write a program to read the two waveforms, and calculate the phase.

Why don't you just use the scope to measure the phase?

Al

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- Owen002 @ algoss on Jan 19, 2015 6:01 AM
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  I just need the raw sata for further analysis. I can save the data in two ways:
  
  1: pause the measurement -> „On-screen Data“ option -> save data into two files
  2: run the measurement -> „On-screen Data“ option -> save data into two files
  
  Are the phase shifts in these two ways the same?
  
  Senmeis
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  - algoss @ Owen002 on Jan 20, 2015 4:54 AM
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    Do you want to save the measurement that the scope makes, or save the files, so that you can do the measurement? They are very different things.
    
    Al
    
    Disclaimer: For more reliable response, you should consider calling your local Keysight Technical Call Center. The Keysight Forums are monitored on an "as available" basis, and aren't necessarily the fastest way to get technical questions answered.
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    - Owen002 @ algoss on Jan 21, 2015 6:54 AM
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      I want to save the measured waveforms into files. The key question is if it makes difference to stop the measurement before saving or not.
      
      Senmeis
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      - algoss @ Owen002 on Jan 21, 2015 7:24 AM
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        As an aside, I don't think of capturing data as making a measurement. Measuring phase, or peak-to-peak voltage, is more what I think of as making a measurement.
        
        As a matter of form, you should always stop the scope before you save the data. If the scope is running, it will stop, save the data (all of the channels previously specified), then continue. Stopping allows you to look at the data onscreen, and make a decision as to whether it's good data, or if some sort of anomaly caused bad data to be captured. It also allows you to check that you have told the scope to save both channels, and that the filename is correct.
        
        Al
        
        Disclaimer: For more reliable response, you should consider calling your local Keysight Technical Call Center. The Keysight Forums are monitored on an "as available" basis, and aren't necessarily the fastest way to get technical questions answered.
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save two waveforms with a phase shift in DSO9254A

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