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In modern times, the solution looks like this
Figures courtesy of Accelerant Networks, manufacturer of
digital adaptive transceivers for
communication at 5 Gb/s and beyond.
This example shows how we deal with limited bandwidth in
modern times.
This picture shows measured waveforms using an
Accelerant PAM-4 multilevel transceiver running at a baud rate of 2.5
GHz (~ 5 Gb/s).
At startup (without equalization) the received data eye
is closed. After automatic convergence the transmitter pre-distorts
(equalizes) the transmitted PAM-4 signal so that the received signal is
easily recovered.
The transmitted baud interval is 400 ps, yielding a
delivered data rate of roughly 5 Gb/s.
All Publications by Dr. Howard Johnson except as noted.
Signal Integrity Training Classes taught exclusively by Dr. Howard Johnson -
for full schedule, see www.sigcon.com
© 2003 Signal Consulting, Inc., Dr. Howard
Johnson. All rights reserved.
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