I always want to make a nice-looking infograph for Wikipedia on the TV color bars, with colors, labels, and explanations of the staircase waveforms, black level, color burst, etc (basically combining all annotations in a textbook to a single image). Most people have only seen the color bars as an image, but the more interesting aspects can only be seen on a TV waveform monitor, if the signal is properly adjusted, you can see the "staircase" waveform align to the etched mark on the CRT (not a particularly good graph: https://www.maximintegrated.com/content/dam/images/design/te...). Currently, Wikipedia articles on NTSC/PAL don't have any explanation on how an analog video signal is made. Too bad that I don't know anything about image editing (I did export a waveform from the ADS simulator, waiting to be visualized indefinitely).

Also, if anyone has a high quality photo of the Philips PM5544 video signal generator, please upload it to Wikipedia. This machine is an important artifact of popular culture, yet photos of the signal generator itself is uncommon on the web (and many people mistakenly believed the PM5544 is just a test card, not a signal generator), but so far there's no high-quality photo under a free license. (Or leave a comment if you have the actual machine, I'd pay $1000 for that. If I ever get the machine, I'll take a photo and upload it, and write a blog post about how the circles and lines are drawn by the analog circuitry). Finally, manuals, manuals and manuals: I'm willing to buy any documents about the Philips PM5544 (or any notable signal generators) to get them digitized. Currently the only document on the web is an issue of Philips Electronic Measuring and Microwave Notes [0] that only briefly mentions a tiny bit of its inner working.

[0] https://frank.pocnet.net/other/sos/Philips_PM5544_PM3400_Pub...