Hi @rower30. I’m not a DTX guy so I’m not sure I understand what I’m seeing. I just got two 6A cables from BJC and looked at the test data. Seems there are some differences, but I’m not sure what they mean with respect to whether one is “better” than another (even though both pass) for throughput or anything else that might make one better for something than the other. Data attached.
Tony,
Remember this is the absolute WORST point, with every other point in RL and NEXT being higher. These are really good numbers for a 1-500 MHz cable.
There are four pairs so we can have six combinations on some tests like NEXT and four on others like Impedance.
pair 1- pair 2
1-3
1-4
2-3
2-4
3-4
THE GREEN PAIR IS CALLED SPLIT PAIRS per 568B (see below);
This is the cheat sheet for the weird pair convention for two wires. A 36 number pair is a Stripe+Solid green pair, for instance.
There are 13 TEST a cable has to pass (if it is good cable it is tested anyway). Some tests are done BOTH ways, so the number is even higher really. Ethernet cable is not an accident for performance. All those tests pass, too, per the summary header “PASS”.
ACR (one way)
ACR/Power Sum (one way)
Attenuation (one way)
CUB (one way)
DCR (one way)
DCR Unbalance (one way)
Delay (one way)
ELFEXT (both ways)
ELFEXT/Power sum (both ways)
Impedance (both ways)
NEXT (both ways)
NEXT/Power Sum (both ways)
SKEW (one way)
RL (both ways)
TCL (both ways)
Best,
Galen