1. Gigabit Ethernet Design ECE 4006C – Spring 2003
Group 7
Presentation #10
Courtenay Smith
April 17th, 2003

2. Progress Report Sensitivity problem solved
Eye diagram comparisons
Attenuation testing complete:
Tx at 5dB, and 10dB.
Loopback (TxRx) at 5dB, 10dB, and 15dB
Alignment tolerance test completed.
Eye diagrams and Plot
Run 2 layout completed and shipped.
Begun work on final paper.
Presentation #10 - April 17, 2003

3. VCSEL Power Test Setup
Presentation #10 - April 17, 2003

4. Sensitivity Problem Corrected
We were not driving the VCSEL hard enough. [ ] mW
320.5 V P
measured IN = W
320.5
8 mV P 1 =  25 mW
320.5
289 mV P 2 = 
.903
Presentation #10 - April 17, 2003

5. Signal Comparisons Tx PRBS7 - Old Loopback PRBS7 - Old Tx PRBS7 - New
Loopback PRBS7 - New
Presentation #10 - April 17, 2003

6. Tx Attenuation at 5dB D21.5 at 5dB K28.5 at 5dB K28.7 at 5dB
PRBS7 at 5dB
Presentation #10 - April 17, 2003

7. Tx Attenuation at 10dB D21.5 at 10dB K28.5 at 10dB K28.7 at 10dB
PRBS7 at 10dB
Presentation #10 - April 17, 2003

8. Loopback Attenuation at 5dB
D21.5 at 5dB
K28.5 at 5dB
K28.7 at 5dB
PRBS7 at 5dB
Presentation #10 - April 17, 2003

9. Loopback Attenuation at 10dB
D21.5 at 5dB
K28.5 at 5dB
D21.5 at 10dB
K28.7 at 10dB
Presentation #10 - April 17, 2003

10. Loopback Attenuation at 15dB
D21.5 at 15dB
K28.7 at 15dB
Presentation #10 - April 17, 2003

11. Alignment Tolerance Setup
Presentation #10 - April 17, 2003

12. Unconnectorized PD Eyes
K28.5
K28.7
PRBS7
Presentation #10 - April 17, 2003

13. Alignment Tolerance Results
Presentation #10 - April 17, 2003

14. Alignment Tolerance Results
Diameter of bottom circle  45 m
Height of cone  76.7 m
Presentation #10 - April 17, 2003

15. Run 2 Layout
Presentation #10 - April 17, 2003

16. Gantt Chart Scheduled Progress On Schedule Progress Event
Presentation #10 - April 17, 2003

17. Game Plan Assemble and Test Run 2 PCB. Full throttle on FINAL PAPER.
Presentation #10 - April 17, 2003

18. Dan Quayle Quote of the Day..
“This president is going to lead us out of this recovery. It will happen.”
Presentation #10 - April 17, 2003