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In Reply to: RE: Ars Technica dissects an AudioQuest Vodka ethernet cable posted by AbeCollins on July 24, 2015 at 09:28:00
Very interesting...
As I understand it, it is the RJ45 connector that does not meet spec.
Speculating: could it be the pin configuration causing a problem with cross-talk?
From what I understand, the non-RJ45 connector for CAT7 does meet spec. Manufacturers are supplying adapters to female RJ45 ports.
What I am curious about, besides exactly why it doesn't meet spec, is how is CAT8 with RJ45 termination going to meet a spec that is even higher in bandwidth?
"Asylums with doors open wide,
Where people had paid to see inside,
For entertainment they watch his body twist
Behind his eyes he says, 'I still exist.'"
Follow Ups:
...how is CAT8 with RJ45 termination going to meet a spec that is even higher in bandwidth?"
A couple ideas come to mind.
- The CAT8 specs calls for a shorter maximum distance so that helps a lot.
- New manufacturing techniques with tighter tolerances in terminating the connector to the cable.... techniques that will be impractical to impossible to achieve in hand soldered boutique cables.
Nice written article.
"Propagation Delay & Delay Skew""Propagation delay is the amount of time that passes between when a signal is transmitted and when it is received at the opposite end of a cabling channel. The effect is akin to the delay in time between when lightning strikes and thunder is heard - except that electrical signals travel much faster than sound. Delay skew is the difference between the arrival times of the pair with the least delay and the pair with the most delay. Transmission errors that are associated with excessive delay and delay skew include increased jitter and bit error rates."
For what it's worth and it could be nothing, note the specified 'delay skew' is about half for CAT 7 (30ns) as that for CAT 6/6a (50ns).
Edits: 07/25/15
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