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Thread: Help with Oscilloscope

  1. #16
    Ultimate Dev'r Newbie
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    Well, I got my Dad to help me, and he showed me how to get it to stop on my oscilloscope. Apparently there was a hidden setting I didn't know about, and he learned years ago. One of those old tips you learn from old folks


  2. #17
    evandude Good evandude Good evandude Good
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    Nigel, unless you are using some additional hardware and fancy software... PC sound-card based scopes can't handle DC voltages, since the input to the soundcard is ac-coupled...

  3. #18
    Super Moderator Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent
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    Quote Originally Posted by evandude
    Nigel, unless you are using some additional hardware and fancy software... PC sound-card based scopes can't handle DC voltages, since the input to the soundcard is ac-coupled...
    Quite true, but I never suggested they could!.

    As for Ultimate Dev'r, what is this "old tip you learn from old folks ", I'm an "old folk" (at least oldish) - I can only assume you have a storage scope, and he showed you how to operate it?.
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  4. #19
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    No; I have a really, really old oscilloscope, and he just told me to set the source to ext. and to set the VAR knob precisly in order to get the signal to stop moving.

  5. #20
    Super Moderator Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent
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    Quote Originally Posted by Ultimate Dev'r
    No; I have a really, really old oscilloscope, and he just told me to set the source to ext. and to set the VAR knob precisly in order to get the signal to stop moving.
    Right, so the signal is repetative?, so you can simply lock the scope to it, and see the screen refreshed by the identical images.

    From your description, and the screen shot, I presumed it was a 'one off' signal, like many remote controls put out.
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  6. #21
    atferrari Good atferrari Good atferrari Good
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    Default So, may I say...

    May I say then, that my reply was not wrong?

    A reply please, anyone?

    Agustín Tomás

  7. #22
    Super Moderator Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent
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    Default Re: So, may I say...

    Quote Originally Posted by atferrari
    May I say then, that my reply was not wrong?

    A reply please, anyone?

    Agustín Tomás
    It's hard to say, your reply wasn't very clear - I'm presuming English isn't your first language?. If you had your location filled in, we would know where you were from, and would have more of a clue about your language skills.

    But, as far as I understand you, your reply was fine!.
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  8. #23
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    Right, so the signal is repetative?, so you can simply lock the scope to it, and see the screen refreshed by the identical images.

    From your description, and the screen shot, I presumed it was a 'one off' signal, like many remote controls put out.
    Yes, that's it.

  9. #24
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    Quote Originally Posted by Ultimate Dev'r
    Yes, thank you for your help. I also looked around elsewhere on this forum, and found out some good information. I guess the only question I have now is how to make the lines stop zipping across the screen. I've been able to slow them down, but I'd like to know if there's a setting to freeze frame or something like that.
    If your scope is triggered correctly then you should have no problem with your traces zipping across the screen, unless it is broken.

  10. #25
    atferrari Good atferrari Good atferrari Good
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    Default My mother tongue

    My mother tongue is Spanish and I live in Buenos Aires - Argentina.

    Nigel, just a an exception, if you understood my reply, could you please rephrase it for me? I would appreciate that.

    Gracias.

    Agustín Tomás

  11. #26
    Super Moderator Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent
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    Default Re: My mother tongue

    Quote Originally Posted by atferrari
    My mother tongue is Spanish and I live in Buenos Aires - Argentina.

    Nigel, just a an exception, if you understood my reply, could you please rephrase it for me? I would appreciate that.

    I'd have put it something like this:

    If the signals on channel 1 and channel 2 are syncronised with each other, and within the frequency range of the oscilloscope, you should be able to get a triggered and locked display.

    As the waveform on channel 1 is the simpler waveform, it would be best to trigger the scope from that channel.
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  12. #27
    atferrari Good atferrari Good atferrari Good
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    Default Thanks Nigel.

    Thanks

    Agustín Tomás

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