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Glad to see my post brings a nice trip to you.

From the comment sections, it appears to me that Hacker News has no shortage of hobbyists and professional electronics engineers, but when I search relevant terms like "Tektronix", "oscilloscope", "spectrum analyzer", or "SPICE", there's no much information here, only two or three top articles. I guess it's unfamiliar to the Silicon Valley CS majority who doesn't have enough appreciate of hardware engineering. I'll try to post more of them in the future.