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GIGABIT ETHERNET DESIGN ECE164.02 - Spring 2004 Group 1

GIGABIT ETHERNET DESIGN ECE164.02 - Spring 2004 Group 1. Presentation 8 – Yashar Pirzadeh. Progress Summary. Got transmitter eye (long story) on non-aggressive board Soldered aggressive transmitter and receiver Website up Continued work on paper. Gantt Chart.

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GIGABIT ETHERNET DESIGN ECE164.02 - Spring 2004 Group 1

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  1. GIGABIT ETHERNET DESIGNECE164.02 - Spring 2004Group 1 Presentation 8 – Yashar Pirzadeh

  2. Progress Summary • Got transmitter eye (long story) on non-aggressive board • Soldered aggressive transmitter and receiver • Website up • Continued work on paper

  3. Gantt Chart

  4. Non-Aggressive Transmitter Troubleshooting • Replaced VCSEL (leads broke) • Checked every solder lead and VCSEL orientation • Tried different grounds • Used probe to troubleshoot: • Why differential signals off? • Possible short

  5. Non-Aggressive Transmitter Troubleshooting (cont.) • One signal was really strong, the other signal was really weak • Strong signal was at small DC value, but had large peak-to-peak value • Conclusion: VCSEL must not be biased

  6. Solution On further inspection, potentiometers wrongly swapped!

  7. Success For the first time in optical testing: no Rx loss signal

  8. Transmitter Testing

  9. Next Week’s Agenda (and beyond) • Get Everything Done • Clean non-aggressive build and test • Fix aggressive power short • Test aggressive transmitter/receiver • XYZ Plane Analysis • BER Tests • Better Documentation and More Photos • Finish Report • Final Web Site Update

  10. THE END • Group Members • Russell Cook • Yashar Pirzadeh • James Dezelle

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