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Dual trace on single trace oscilloscope?

Discussion in 'Misc Electronics' started by John, Jul 30, 2004.

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  1. John

    John Guest

    Sometime in the dim and distant past I remember seeing a DIY circuit
    that would allow two channels to be displayed, presumably by switching
    rapidly from one to the other. Has anyone tried this and does it work!?
    If so can you give a web-page address, please?
  2. E. Rosten

    E. Rosten Guest

    You should be able to do it with chopping or switching once per scan.
    I've used dual trace scopes which have a toggle switch to alternate
    that behaviour. I guess you need a scope with a sync output for that to
    work which might be quite unlikely on a low-end scope. However, it
    would require much lower swithcing bandwidth.

    One would need to add in a switch so you can route one or the other
    signals in to the oscilloscope's sync input. If it has a seperate sync
    input, of course.


    (You can't go wrong with psycho-rats.) (er258)(@)(

    /d{def}def/f{/Times findfont s scalefont setfont}d/s{10}d/r{roll}d f 5/m
    {moveto}d -1 r 230 350 m 0 1 179{1 index show 88 rotate 4 mul 0 rmoveto}
    for /s 15 d f pop 240 420 m 0 1 3 { 4 2 1 r sub -1 r show } for showpage
  3. L.

    L. Guest

    As cheap as dual trace scopes are now days, why not buy one? If you're
    hurting for cash, some older single trace scopes are DIRT cheap. You could
    buy two, sometimes for $15 - $20 total.

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