As long as we are wandering around the topic a bit, and not to state the obvious, but in case it helps anyone, if you want to compare the effect of cables (different materials, lengths, etc.) an easy way to do it is to attach two alternative cables to a two channel generator and set the channels for tracking - then change frequencies, amplitude, etc. and watch rise times and fall times, etc. on your scope.
Here's one I set running a for while after Self Cal of both Siglent SDS2304 & SDG1010.
Both AWG channels checked for SAME settings ie.
10 MHz square wave, 3 V p-p, 50 Ohm source
DSO
50 Ohm internal termination
Statistics ON for ~20,000 counts then image saved.
Delay 5ns for ease of reading stats.
Cables
AWG Ch 1: 1M RG-58C/U as used previously to DSO Ch 1
AWG Ch 2: 500 mm unknown brand/spec/type to DSO Ch2
Seen are some interesting variations in the Mean values recorded.
Risetime in particular between the 2 AWG channels with 0.6ns variation, Channel 2 the slower.
But to be fair Ch 2 is operating at its max 3 V P-P output into 50 Ohms.
Both channels have risetimes nearly twice as fast as the spec'ed 12 ns and as good as the published 7ns Pulse specs.
But what about the unknown spec cable?
Now we have the unknown cable from AWG Ch1 to DSO Ch2.(cables swapped at AWG)
You can see in the stats how the unknown cable risetime is now faster as a result of the greater drive capability of Ch1 of the AWG.
So lets reduce the P-P voltage to a lower level that AWG Ch2 is more capable of driving. (not max'ed out)
The Risetime, V p-p and Std Dev values are now MUCH closer between channels.
AND it seems at 10 MHz this unknown cable has little affect on results.