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Oscilloscope EXT. INPUT , source Channel#2

Discussion in 'General Electronics Chat' started by Billy Mayo, Dec 11, 2013.

  1. 4pyros

    4pyros Well-Known Member Most Helpful Member

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    AG said;
    There are no block diagrams!
     
  2. audioguru

    audioguru Well-Known Member Most Helpful Member

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    I said they both use a Schmitt trigger circuit. You said they didn't so I showed both.

    They are both Schmitt trigger circuits. Look in Google to see what they do and how they work.

    Of course a vacuum tube circuit is different than a transistor or IC circuit but both oscillators produce the same linear sawtooth waveform.
     
  3. Billy Mayo

    Billy Mayo Member

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    i mean the whole entire circuit not just that one block circuit, i mean thw whole schematic of a tube o scope vs a solid state o scope circuit , not just the sweep generator block
     
  4. dave

    Dave New Member

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  5. ChrisP58

    ChrisP58 Well-Known Member

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    The nuts and bolts on the inside of the two scope types are totally different. But you could say the same about a CRT type television compared to an LCD/LED TV. But, other than the extra abilities that a digital scope provides, the basic functionality remains the same. And, setting aside the digital aspect, the control and usage of the two scopes is virtually the same. You have the same vertical controls for the inputs, the same sweep rate controls for the horizontal time base, and the same options for the trigger.

    As for triggering on whatever signal you want to look at, instead of the AC line that is powering the scope, I would have to say that probably accounts for 99.9% of how most people use a scope. About the only time that I ever use line triggering is to see if there is some unintended AC line coupling that has crept into my circuits.
     
  6. Billy Mayo

    Billy Mayo Member

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    ac line coupling? what does it look like?

    thats only for circuits that are sync to 60hz?
     
  7. ghostman11

    ghostman11 Well-Known Member

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    Incorrect we get it as well at 50hz :D,
    it looks like a sine wave.
     
  8. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Here in North America the electricity is 60Hz and the horizontal sweep of an old black and white TV was also 60Hz. Some AC motors are synchronous to 60Hz or a multiple of it.
    In the 50 years I have had my 'scope I have NEVER sync'd it at 60Hz and at work I have also NEVER sync'd a 'scope at 60Hz. I have always sync'd it to the input signal that I was viewing so I could view it with a STATIONARY waveform. That is the function of sync on a 'scope.
     
  9. ghostman11

    ghostman11 Well-Known Member

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    With respect AG, you have totally misunderstood. You have been dealing with O scopes in the real world, and have presented information based on that. Clearly in this thread, we are some place far away from there!
     
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  10. Reloadron

    Reloadron Well-Known Member Most Helpful Member

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    Wasn't the Horizontal around 15 KHz and the Vertical 60 Hz here in North America?

    Ron
     
  11. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Correct, Ron.
    I guess I haven't poked around inside a TV for years.
     

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