Thinking about RS485 driver and receiver over a long CAT5 run.
values from:
https://en.wikipedia.org/wiki/Primary_line_constants
The receiver needs 400mV input.
The transmitter drives the pair with about 3V (I'm showing 2.5V).
I think 100 times more elements are needed to see the frequency response, but this might be good for showing the signal level.
