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Forum Suggestions for software to generate arbitrary (arb) waveforms?
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  • waveform
  • arbitrary_function_generator
Related

Suggestions for software to generate arbitrary (arb) waveforms?

baldengineer
baldengineer over 3 years ago

To avoid the XY Problem, here's what I'm trying to do: I want to generate a repetitive waveform with an occasional glitch. I intend to use it as a demonstration of how oscilloscope acquisition modes, interpolation, and triggers work. So the exact characteristics are yet to be determined. A minimum example would be 10 cycles (with some pre-determined period) with 1 cycle having a glitch (not sure how "big" yet.) A maximum example would be 20 cycles with the glitch where the glitch varies in the waveform. (All depending on available sample memory.)

Off-hand, I'm not aware of any good tools that help automate generating an arbitrary waveform such as that. Ideally, I'd like a CSV export. I'd like the time/voltage as CSV to make it more compatible with various instruments. (Also seems like it'd be useful in simulations?)

Any suggestions? Or what do other people use?

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Top Replies

  • Gough Lui
    Gough Lui over 3 years ago +6
    I normally just write something quick in Python or use MATLAB. Judicious use of the csv, math and random libraries may well make it a quick job. Another option is that some AWG vendors have their own…
  • shabaz
    shabaz over 3 years ago +6
    Hi James, I find Excel useless at it too : ) It can't handle large datasets. If you want a graphical tool, then a free download of Tektronix ArbExpress will do it : ) You can tell it to generate a…
  • scottiebabe
    scottiebabe over 3 years ago +5
    Lots of good suggestions already. Here is yet another Spice Then you can export the data as a tab delimited file (at least in LTSpice) could always find and replace tab to comma if needed.
Parents
  • baldengineer
    baldengineer over 3 years ago

    Success! Cross vendor fun!

    Here's what I setup in Tek's software.

    image

    And now here is what I see on my RTM Scope.

    Sample (Normal) Mode rarely shows the glitch even though it should appear every other cycle.

    sample mode, no glitch

    Yet, Peak Detect Sees it on every acquisition. (Though, it does flip back and forth between the cycles.

    peak mode sees it

    Not really a practical example, but it's what I needed to demonstrate what "peak detect" can help find.

    Thanks All! I'll use some of these other suggestions for other AWG needs in the (hopefully) near future.

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  • baldengineer
    baldengineer over 3 years ago

    Success! Cross vendor fun!

    Here's what I setup in Tek's software.

    image

    And now here is what I see on my RTM Scope.

    Sample (Normal) Mode rarely shows the glitch even though it should appear every other cycle.

    sample mode, no glitch

    Yet, Peak Detect Sees it on every acquisition. (Though, it does flip back and forth between the cycles.

    peak mode sees it

    Not really a practical example, but it's what I needed to demonstrate what "peak detect" can help find.

    Thanks All! I'll use some of these other suggestions for other AWG needs in the (hopefully) near future.

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  • shabaz
    shabaz over 3 years ago in reply to baldengineer

    That's very neat! Excellent that R&S developers had robust enough sanity check in their code to ignore the few text/comment lines at the beginning of the file : ) 

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