X Y Channel switch.

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X Y Channel switch.

Postby mechonic » Wed Dec 21, 2016 7:10 pm

Would it be possible to have an arrangement where the X and Y channels switch off their comparison of each other? CRT oscilloscopes have an add button to cancel the comparison which then leaves the two channels independent.
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Re: X Y Channel switch.

Postby PicoKev » Wed Dec 21, 2016 10:45 pm

I am intrigued as to what automotive application you would need that feature? :?

Please enlighten and educate me. :oops:

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Re: X Y Channel switch.

Postby Technician » Thu Dec 22, 2016 1:06 am

I wonder if it is something to do with comparing analogue and digital signals :)
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Re: X Y Channel switch.

Postby mechonic » Thu Dec 22, 2016 1:27 am

Hello,

I am wanting the X channel to be totally free running which means the signal it carries is not compared to signal Y. Pico automotive 6 has an XY mode so my question isn't related to automotive testing. Thanks for your interest.

Regards.
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Re: X Y Channel switch.

Postby Martyn » Thu Dec 22, 2016 9:07 am

Standard operation would be Channel A against Time, Channel B against Time. XY mode is for plotting Channel A against Channel B, so by definition linked.

So I am unsure as to the nature of your question.

Do you have a one of our scopes, if so which model ?
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Re: X Y Channel switch.

Postby mechonic » Fri Dec 23, 2016 1:12 pm

Hello,

My reference to a CRT oscilloscope meant was it possible through software development to emulate the XY "add/non add" mode.

Regards.
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Re: X Y Channel switch.

Postby STC » Sat Dec 24, 2016 5:14 am

I too am intrigued, I am sure that I will not be able to help you with this but I am interested in learning something. Humour me if you will. :D

After some head scratching I have come up with a couple of thoughts;

Are you looking to display Channel A Voltage on the X Axis and Channel B Voltage on the Y Axis or vice versa ?
Or, are you trying to look at 2 inputs (Channel A & B) on 2 different time bases ???

I digress from the thread but I'm curious :wink: :?:
I was on a Product / Scope course (not Pico - A Bright Coloured machine I bought from a van) some time ago when the Instructor bought up the subject and advantages of having 2 time bases on a scope. The example he gave was that he would want to simultaneously see Crank Position on one time base and lambda (a comparatively slower switching signal) on another, slower, time base.

To this day, 10+ years on, I cannot work out what his logic was. Lets say that scope software allowed this to happen, surely the relationship between the two and any diagnostic value, in an automotive application, would be lost and at best be misleading ??

Merry Christmas.
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Re: X Y Channel switch.

Postby andrewbishop66 » Sun Dec 25, 2016 3:51 pm

I remember my first scope which was crt it was old then in1985 had an eternal input for the Y never used it though I think the idea was to use the time base from the circuit under test

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Re: X Y Channel switch.

Postby Technician » Sun Dec 25, 2016 7:32 pm

I know a man who knows the answer to this problem, and as soon as he tells me I'll pass on the information.
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Re: X Y Channel switch.

Postby mechonic » Wed Dec 28, 2016 4:38 pm

Hello,

Some close replies here. The X axis would receive an external timebase from the circuit under test. Could this be incorporated into the software?

Regards.
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