1. ECE 135 – The Three Presentation 8 Pat Cleary with Kevin Parker & Bryan Chavez March 24 th, 2005 March 24 th, 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 ItemSupplierPart #QtyUnit PriceTotal Amount Ferrite Chip InductorDigikey490-1034-1-ND30 $ 0.12 $ 3.60 Power JackDigikeyCP-002APJCT-ND5 $ 0.81 $ 4.05 POT 1.0kOhmDigikey3296W-102-ND5 $ 2.50 $ 12.50 POT 25kOhmDigikey3296W-253-ND5 $ 2.50 $ 12.50 Resistor 115 OhmDigikey311-115CCT-ND10 $ 0.08 $ 0.80 Resistor 100 OhmDigikey311-100CCT-ND10 $ 0.08 $ 0.80 Resistor 24 OhmDigikeyRR12Q24DCT-ND10 $ 0.15 $ 1.51 Resistor 10 OhmDigikeyRR12Q10DCT-ND10 $ 0.15 $ 1.51 Capacitor 10000 pFDigikeyPCC103BNCT-ND100 $ 0.04 $ 3.66 SMAsJameco901-143-6RFX10 $ 4.20 $ 42.00 2.5 Gbps ROSAAdvanced Optical ComponentsHFD3180-1034 $ 10.00 $ 40.00 2.5 Gbps VCSELAdvanced Optical ComponentsHFE419x-5414 $ 14.50 $ 58.00 PCB Board FabExpress PCB 2 $ 59.00 $ 118.00 Shipping and MiscellaneousVarious $ 25.94 Total $ 324.87

5. Corrected Bill Of Materials ProductVendorItem NumberQtyLarge Qty Price ($)Total Amount ($) POT 1.0K OHMDigikey3296W-102-ND11.092 POT 25.0K OHMDigikey3296W-253-ND11.092 RES 115 OHMDigikey311-115CCT-ND20.016820.03364 RES 100 OHMDigikey311-100CCT-ND20.016820.03364 RES 24 OHMDigikeyRR12Q24DCT-ND10.02958 RES 10 OHMDigikeyRR12Q10DCT-ND10.02958 CAP 10000 PFDigikeyPCC103BNCT-ND180.018880.33984 CONN PWR JACKDigikeyCP-002APJ-ND10.40338 Ferrite Bead InductorDigikey490-1034-1-ND50.0640.32 VCSELAOCHFE419x-54117.25 ROSAAOCHFD3180-10315.00 Laser Driver ChipMaximMAX328714.00 Limiting Amplifier ChipMaximMAX326414.00 PCB BoardExpress PCB4 Layer Board15.7195 Total $ 29.34

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