compared to everything being laid down at exactly the same time. It took me a few tries, and I thought it was working OK when I started! The accuracy of offset printed spot color overlays is not as good as the accuracy of an inkjet print - you can't avoid the paper "breathing" between runs, slight registration differences, etc. anyway, the attached file is good for setting up your printer to give its best. the trick is to use vector graphics, I guess - there is nothing inherent in PDF that limits resolution (other than possibly the size of your hard drive!). I've attached a PDF resolution test chart that will outperform any printer I've seen. I also like having a physical sheet of paper to markup and come back to later. What happens if a R/L/C value changes? I can compare the result immediately, compared to several clicks and keystrokes to re-run a simulation. I'm not sharp enough to figure out resonance frequencies, characteristic impedance, and Q factor in my head and this gets me the answer quick. I'm pretty fast with LTspice, but I reach for this chart for first-pass understanding of passive networks. This type of graph paper isn't for plotting data points, it's for understanding systems.
I'm still considering what to do with this project, including the PDFs. These seem like small issues, but having some experience in graphic design, they stick out. PDFs made for print often don't look right on screen, since free PDF viewers don't handle spot color overprinting correctly. It really needs to be run on an offset press with spot colors to look right. Process color (CYMK) and fine lines are a poor combination because the halftoning process creates the appearance of a broken line where you wanted a fine solid line. I've tried both inkjet and "digital offset" printing and both were unsatisfactory. I don't need graph paper when I can draw this in a spread sheet. The curve showed we would be rid of this disease in the US in just two more weeks. A perfect example of this is fitting a line to the daily infection rates to estimate when we could be rid of COVID if we just kept doing what we were doing.
A more dedicated tool or a spread sheet addin would be nice.
A spread sheet is only a B+ tool for graphing. I have even gone so far as to draw a line on top of a chart when it's too much trouble to extract the subset of data to use for the linear regression. Tools give me curve fits and many things that would be inaccurate done by hand. What I typically end up doing is creating a table of the data in a spread sheet and letting it draw the chart for me. Wouldn't it be better to have the graph paper on the computer screen in a way for you too draw on it without a pen and ruler and all the added errors? It's not often I want to draw a graph that isn't already drawn for me, but when it happens, I don't want paper.
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