Can any digital scopes do X-Y ??? - diyAudio
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Old 15th August 2012, 04:50 PM   #1
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Default Can any digital scopes do X-Y ???

I've been using an analog scope to display X-Y like the pic in my avatar. It's a great help to have control of the deflection factor (volts per division) and signal inversion like the old Tek 7000 series where all you have to do is stick a vertical plugin in the horizontal slot. Phase is a problem above 100kHz because of the vertical delay line, but that's ok. Is there a digital scope that can do this?
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Old 15th August 2012, 05:56 PM   #2
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Far as I know, they all can. The three I have owned, from $1000 to $3000, have all had the functionality.
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Old 15th August 2012, 08:55 PM   #3
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My trusty Lab Assistant used the X-Y mode on the Tek TDS 1002B to plot the V-I characteristic of a series RLC circuit at two different frequencies . . . and determined that the roll of black hookup wire has an inductance of about 49 uHy.

Other comments:
  • The "MEASURE" feature on the TDS 1002 doesn't work with X-Y mode so you can't show frequency on the X-Y display;
  • The Tek "OpenChoice Desktop" program is a nice way to grab an image of the 'scope display;
  • The Windows "Snipping Tool" is an easy-to-use screen-capture program;
  • The IPEVO P2V webcam can focus down close enough to inspect the plating on an IC pin.
Dale
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Last edited by dchisholm; 15th August 2012 at 08:58 PM. Reason: Attempt to get better image
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Old 15th August 2012, 10:28 PM   #4
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The things I'm looking at are not repetitive waveforms. Mostly looking at voltage and current in a speaker driven by a guitar well past clipping. See post #4 in this thread: soft clipping from current limited power supply
The waveforms need to be recorded for perhaps 0.1 seconds and then plotted in X-Y form. Can the scope display it in real time or is it some post acquire processing?
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