PSpice: Any way to "lock" plot window?

Is there a way in PSpice (part of OrCAD 9.2, in my case) to "lock" the current plot so that a subsequent simulation will plot its probe results on top of the current plot? (The idea is to be able to change component values, simulate again, and visually compare how the response.)

Thanks,

---Joel Kolstad

Reply to
Joel Kolstad
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Joel, In 9.2, what you do is two-fold.

First, you set Restore Last Probe Session in your sim profile (Analysis/Setup in Schematics). This will give you the same look as the last time.

Next, you need do one of two things. First, you can just create a new sim profile. This will save the .dat file with a different name, or you can go in and manually rename the .dat file to a new name. This saves your prior result to a different file.

Then, when you simulate again, go to File/Append and add your last .dat file to the one you are looking at. You can then compare them.

OR, you could just use parametric simulation, and just do one simulation for all the values... 8-)

Charlie

Reply to
Charles Edmondson

The other ways I've found are just as klutzy...

Run a simulation and leave Probe window open.

Change name of schematic (but not markers).

Do component changes and run simulation.

The new results will overlay the old.

[Charlie, Looks like a needed feature, particularly for those of us doing multiple corner simulations.]

I've also resorted to printing the results to a PostScript file, then concatenating the results when I'm finished.

ALMOST FORGOT (particularly shameful, since I'm the one who bitched to Support for years before it became incorporated)...

Version 10.3 includes "File/Save as", making "File/Append" a more palatable approach.

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.
Reply to
Jim Thompson

Thanks for the responses, guys; it's a lot better than nothing.

I was surprised that PSpice still has the "look and feel" of the old DOS version I used back in college in the late-'80s, but hey, it does get the job done. I do think it could be improved -- the programmers might want to take a look at SI-Metrix (which plots subsequent results on the same graph by default!) to get some ideas; I've found it very easy to use.

---Joel

Reply to
Joel Kolstad

I suspect Cadence/OrCAD is systematically killing it off... in the best tradition of M$oft... if you can't compete legitimately, just buy 'em out and let the competing product die :-(

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.
Reply to
Jim Thompson

Here we go again, touting my product:-)

Of course is SuperSpice, one just uses the open file dialog and multiple selects any number of standard spice output files to load them all in to plot them all on the same graph. So, all you have to do rename the default output file after each run so it isn't overwritten by new data.

The more neat way in SS is just to make a text rerun file and list all the components with their values for each run. You can even have SS automatically give every combination of all components listed at all values. That is, specifying c1 as 10n, 20n and r1 as 1k and 2k, is all you need to get all four combinations ran.

Kevin Aylward snipped-for-privacy@anasoft.co.uk

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SuperSpice, a very affordable Mixed-Mode Windows Simulator with Schematic Capture, Waveform Display, FFT's and Filter Design.

Reply to
Kevin Aylward

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