In a short channel, e.g. a 1" long Ethernet cable, which effects are most likely to reduce throughput and why? What would the nature of the throughput reduction be? Specifically, I am wondering about 100/1000 Mbps Ethernet over standard cables like CAT5/5e/6/etc. My assumption is the error rate will jump significantly as the transmission line crosses a threshold that we could colloquially call "too short," but I am unable to quantify that in a meaningful way.
I've been researching this and I'm not finding a lot of relevant information. This paper has some interesting information, but the low-level dive into signals and EM fields is beyond the scope of the topic it seems.
I'm thinking there are a few potential issues:
- Fractional wavelength issues due to the transmission line length
- Timing (min time violations if such a thing exists in this context)
- Power (saturating the receiver)
- ISI (reflections)
I'm sure there are others and maybe the issues I've listed aren't relevant. Any information would be greatly appreciated.