On 04/03/2011 09:33 PM, David C. Partridge wrote:
With any decent TDR you can SEE all the connections so you can measure the 
cable length (+/- a few mm) directly.

No, you can't. You can measure the electrical length. I do have a decent TDR at hand.

You would have to assume the speed in the cable to know the physical length. It's not a high-quality measure mostly.

Cheers,
Magnus

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