To model {HEAD ~ a 30 km line} with {TAIL ~ a sample rate} of 10M samples/second would require 2000 Taps 
with
To model { HEAD ~ a 30 km line } with { TAIL ~ a sample rate } of 10 M samples / second would require 2000 Taps
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH