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Channel-to-channel skew in DSO9254A

Question asked by Owen002 on Jan 19, 2015
Latest reply on Jan 21, 2015 by algoss

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Hello,

a parameter "Channel-to-channel skew" is defined as following:

Channel-to-channel skew (digital) = 2ns typical

Question: what’s the meaning of "digital"? Digital signals?

Senmeis

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algoss Jan 20, 2015 4:52 AM
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There is a digital channel option on the 9000 series of scopes, turning a DSO9254A into an MSO9254A. It adds 16 channels of digital inputs, like a timing analyzer. These inputs are correlated with the analog inputs, and displayed on-screen as digital waveforms.

The upgrade part number is the N2901E, and has a US list price of about $5K

Al

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- Owen002 @ algoss on Jan 21, 2015 6:46 AM
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  What about the analog input skew? In comparison, the skew in 7000 series is given:
  
  2ns typical, 3ns maximum.
  
  Without ‚digital‘.
  
  Senmeis
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  - algoss @ Owen002 on Jan 21, 2015 7:19 AM
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    The 7000 spec that you are quoting is for the digital inputs. For the analog inputs, it isn't specified directly, but is used as part of the "Analog delta-t accuracy" calculation as 40 psec.
    
    As for the 9000, it is also not specified, but I know that it is in the same range.
    
    Note that for both scopes, you can connect two channels to the same input and adjust the skew to be zero, or very close to it. Unless you turn the scope off, or change the external environment (temperature), both scopes will hold that setting very well. It is recommended that you do this, since the probes may not be exactly the same length.
    
    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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Channel-to-channel skew in DSO9254A

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