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Crusty1
Member Since: December 1, 2012
Author
Posts: 436

I think of myself as Gentleman Dilettante of electronics.
Some others consider me to be an menial Idiot Savant.
So that's Crusty in a nutshell? Not quite.
At 12 years of age I was tutored in basic electronic theory by my father (1930 Royal Signals Engineer) and hated anything that was vacuum valve based.
At 14 years old I got my first germanium red spot transistor and amplified the AM medium wave signal from my Crystal Diode radio. This set the scene for a continuing love affair with solid state electronics, building designing and repairing.
During this romance, I found software programming and ended up with two mistresses and one (long suffering wife).
I have had many mentors and benefactors over the years who have given me a boost up the ladder of knowledge, thank you all and thank you London Underground for employing me for so long, I enjoyed every 35 years I spent with the company.
Now at close to 70 years old I get a little time to blog about the small advances I make in understanding the modern technology that comes streaming out into the open market place.


By the way the alias Crusty is apt as you will all find out.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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