Grounding

Discussion in 'Homework Help' started by axerocker, Feb 3, 2009.

  1. axerocker

    Thread Starter New Member

    Nov 17, 2008
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    How do you measure the voltage across an ungrounded component, while using an oscilloscope?
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    Is there a reason you can't ground one side of the power supply for this circuit?
     
  3. Alexei Smirnov

    Active Member

    Jan 7, 2009
    43
    1
    Do not ground scope (of course if you are looking not at high frequency signal) ?
     
  4. Alexei Smirnov

    Active Member

    Jan 7, 2009
    43
    1
    ...or use two-channel scope and subtract channels...
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Measure the voltage on the one side of the component, then the voltage on the other side and subtract the first from the second or vice versa (It just changes the sign).
     
  6. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,039
    287
    This is pretty much my "default" mode in the ham shack! I work with a lot of balanced R.F. circuitry. I'm surprised how few people know this function is even available on most scopes!

    eric
     
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