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ECE.135 - The Three Presentation: Work Summary

This project work summary includes receiving passives and SMA connectors, updating the budget, correcting the bill of materials, soldering and testing Board 1, conducting troubleshooting, and starting the midterm paper. Troubleshooting efforts include discovering shorts, power supply questions, and construction attempts. Transmitter and receiver testing results are discussed along with troubleshooting conclusions and future work.

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ECE.135 - The Three Presentation: Work Summary

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  1. ECE 135 – The Three Presentation 8 Pat Cleary with Kevin Parker & Bryan Chavez March 24th, 2005

  2. Work Summary • Received Passives and SMA Connectors • Updated Budget • Corrected Bill of Materials • Soldered and Tested Board 1 • Board 1 Troubleshooting • Began Midterm Paper

  3. GANTT Chart

  4. Project Budget

  5. Corrected Bill Of Materials

  6. Board 1 Construction

  7. Initial Board 1 Troubleshooting • No Success with Tx or Rx • High-Pitched Noise and a Smoking Ferrite Bead…Good? (We’re Thinking No) • Short Discovered Between Power Supply and Ground (Not from Layout) • Power Supply Questions

  8. Board 1 Construction – Take 2 • The Three’s Tried-and-True Strategy: Start Over • Results: Nothing Breaks During Testing!!!!!

  9. Transmitter Testing • Left and Right Inputs to VCSEL • Signals Want to Be Eyes… Not Quite There • VCSEL Not Lasing

  10. Receiver Testing • ROSA Output is Desirable Eye • No Output From Limiting Amplifier • Limiting Amplifier Extremely Hot at First

  11. Troubleshooting Conclusions • Disastrous First Attempt at Board 1 • No Shorts in Current Board • Problem Could be a Design Issue or a Component Problem • Possible Theory for Receiver: Maxim Chip Overheated and is Toast?

  12. Finish Midterm Report Continue Troubleshooting Board 1 Purchase Rabbit’s Foot Avoid Ladders and Black Cats Pray Future Work

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