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I second this advice, and would add another reason: Buy an analog scope while you can still find them for cheap! They don't make good ones anymore. The analog scope is a lifetime purchase.

But the calibration point still applies. On my Tek 454, there are calibration knobs built right into the UI. The user is expected to tweak and calibrate as they go, and depending on the measurement. (Often the shape of the waveform is all you are trying to see.)

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I un-second it, if that's 'a thing', I think that was solid advice 10+ years ago, but not any more. The decent ones are less often seen, and they're collectors' items so they go for more than they're worth (to the audience the advice is directed at).

Unless doing something very particular straight off the bat (like audio or power or something) a beginner is better advised to get a cheap MSO / multichannel DSO, IMO, even computer based.

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