Author Topic: But what can you really do with X Y channal on your scope?  (Read 1475 times)

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Offline Beamin

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Offline tautech

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Re: But what can you really do with X Y channal on your scope?
« Reply #1 on: December 14, 2018, 08:24:39 am »
Yep, the master's YouTube channel:

https://www.youtube.com/user/jerobeamfenderson1
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Offline vk6zgo

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Re: But what can you really do with X Y channal on your scope?
« Reply #2 on: December 14, 2018, 10:00:11 am »
Apart from that, you can use it check phase between signals, or you can measure % amplitude modulation using a trapezoidal pattern.
 

Offline rhb

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Re: But what can you really do with X Y channal on your scope?
« Reply #3 on: December 14, 2018, 11:20:09 pm »
A proper DSO which will let you plot CH1 vs Integral(CH2) will let you display the hysteresis curves of core materials.  So far as I know only some of the LeCroy models will do that.  I bought a DDA-125/LC684DLX for that reason.  Other wise you have to build an analog integrator accessory.  Or buy an instrument engineered specifically for the task.

It's really ridiculous, but is the natural consequence of people who have never used a scope writing the FW.
 
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Online 2N3055

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Re: But what can you really do with X Y channal on your scope?
« Reply #4 on: December 14, 2018, 11:36:00 pm »
A proper DSO which will let you plot CH1 vs Integral(CH2) will let you display the hysteresis curves of core materials.  So far as I know only some of the LeCroy models will do that.  I bought a DDA-125/LC684DLX for that reason.  Other wise you have to build an analog integrator accessory.  Or buy an instrument engineered specifically for the task.

It's really ridiculous, but is the natural consequence of people who have never used a scope writing the FW.

I use Picoscope for that kind of tasks.. It can also do that.
 

Offline basinstreetdesign

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Re: But what can you really do with X Y channal on your scope?
« Reply #5 on: December 15, 2018, 12:31:17 am »
Use it to plot I-V characteristics of any device such as this:

https://www.instructables.com/id/Tube-Curve-Tracer/
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Offline daqq

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Re: But what can you really do with X Y channal on your scope?
« Reply #6 on: December 15, 2018, 07:20:32 am »
I used it for a two things so far:
- Simple (pulsed) VA characteristics measurement
- Primitive spectrum analyzer - I put the VCO tuning voltage on the X input, the output from the logarithmic detector (after filters) on the Y input did a sweep
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Offline kizmit99

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Re: But what can you really do with X Y channal on your scope?
« Reply #7 on: December 15, 2018, 04:37:29 pm »
In a pinch you can play Tempest on it...  ::)

 

Offline Feral

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Re: But what can you really do with X Y channal on your scope?
« Reply #8 on: December 15, 2018, 08:03:04 pm »
I played Star Wars on one in 1985. I was a technician at a ShowBiz Pizza Place. We had a Star Wars video game that had a vector instead of raster display. We were waiting on a new CRT for it or something.

This one: https://en.wikipedia.org/wiki/Star_Wars_(1983_video_game)
 

Offline glarsson

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Re: But what can you really do with X Y channal on your scope?
« Reply #9 on: December 15, 2018, 08:23:09 pm »
The first computer I built in 1980 used an oscilloscope as a display until the CRT circuitry was ready. Sync separator and sweep generators on a breadboard connected as X and Y. Video to Z.
 

Online rstofer

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Re: But what can you really do with X Y channal on your scope?
« Reply #10 on: December 15, 2018, 08:40:10 pm »
I use X-Y mode when playing with my analog computers.  The AC generates the X-axis by convention because it used to drive a plotter axis.  Y was plotted against X.  The time/div can be quite slow for real-world problems.

There are cross-coupled differential equations - like the Predator-Prey problem (Lotka-Volterra equations) - where one axis represents the Prey population and the other represents to Predator population.  This results in a warped ellipse.  It is also useful to just plot each population versus time and, in that case, the X axis can be driven by the AC or just ordinary time/div.

Attached is an analog simulation schematic for MATLAB along with a Y vs time and XY plot of the populations. 

XY plots are useful in a number of areas.


« Last Edit: December 15, 2018, 08:42:52 pm by rstofer »
 

Online coppercone2

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Re: But what can you really do with X Y channal on your scope?
« Reply #11 on: December 15, 2018, 08:45:06 pm »
XY can also be used to measure IQ characteristics (constallation diagrams)

 


Offline Brumby

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Re: But what can you really do with X Y channal on your scope?
« Reply #13 on: December 16, 2018, 12:52:19 am »
... and here was me only thinking about precise frequency and phase comparisons.   :palm:
 

Offline mathsquid

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Re: But what can you really do with X Y channal on your scope?
« Reply #14 on: December 16, 2018, 02:46:56 pm »
You can have fun making lissajous curves!


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