On 23/06/2020 22:22, David Higton wrote:
> In message 
>            Michael J. Mahon  wrote:
>
>> More likely, capacitance between lines of a longer cable slows signal
>> transitions, eroding signal margins.
>
> Please, learn transmission line theory.
>
> David
>
Is there any evidence that a USB cable behaves as a transmission line?
Or that the spec matches source and destination impedance to it?

Hmm it seems they do

https://electronics.stackexchange.com/questions/325721/do-usb-data-wires-d-d-ha
ve-90-ohm-differential-impedance-and-single-ended-45

There will still be attenuation however over longer cables


--
Ideas are more powerful than guns. We would not let our enemies have
guns, why should we let them have ideas?

Josef Stalin

--- SoupGate-Win32 v1.05