PAM4 modulation is making headway into the next generation of high-speed serial links. It will be showcased at DesignCon 2015.
PAM, or Pulse Amplitude Modulation, is a well known signal-transmission methodology that's under evaluation for 400 Gbit/s communications using a modulation scheme known as PAM4. It combines two bit streams and uses four levels to encode two bits into a single Unit Interval.
PAM4 will take the spotlight at DesignCon 2015's opening panel session, The Case of the Closing Eye - Resolving 25Gb/sec Design Challenges. See you there.
Now, test your knowledge. As always, answers and their explanations appear on the last page. The questions are based on the application note, "Physical Layer Tests of 100 Gb/s Communications Systems."
Want to learn more? Register now for DesignCon, the premier conference for chip, board, and systems design engineers. Taking place January 27-30 at the Santa Clara Convention Center, DesignCon 2015 features technical paper sessions, tutorials, industry panels, product demos, and exhibits.
1. Which of the following standard(s) groups is considering use of PAM4 transmission methods?
- a and c only
- b and d only
- All of the above
To Question 2