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Yes and no..

Oscilloscope is needed for things like frequency response.

but most consumer care only the power loss and bandwidth only.

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well, that's disappointing; someone needs to miniaturize that and reduce the cost massively
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It’ll never happen. Measuring to the proper Thunderbolt spec is only possible on literally the most cutting edge measurement equipment. Physics just won’t permit that being a gadget you can buy for $20 of whatever.
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