Capstone Design Update Week 11 ECE4006 - Group 1 Presentation by : Yeonshin Won April 10 2003

Progress Summary (Last Week) PROBLEMS/DEBUGS/RESULTS so far done: --configuration between the cathode and the anode of PD reverse PD --cathode pin of PD grounded on the board scratched off the connection between ground and cathode pin --sever jitter in loop back testing  decreased by adjusting bias current( Rbias:=800ohm) --Rx attenuation testing  no eye diagram  PD sensitivity?

Results of Testing (last week) Loop Back test - K28.5 Loop Back test - PRBS7 Rx and TxRx attenuation test did not show eye diagram. Tx with 5 dB - K28.5 Tx with 5 dB - PRBS7

Progress Summary (this week) completed the second board and Tested. finalized so far financial budget constructed Bill of Materials Testing Alignment tolerance of Rx on TxRx

Aggressive Design built 1st Board 2nd Board

Results of Testing (This week) Rx with 0 dB – D21.5 Tx with 0 dB – D21.5 TxRx with 0 dB – D21.5 Tx with 5 dB – K28.5

Results of Testing (This week) Rx with 0 dB – PRBS7 Tx with 0 dB – PRBS7 TxRx with 0 dB – PRBS7 Rx with 0 dB – k28.5 Tx with 0 dB – k28.5 TxRx with 0 dB – k28.5 Ibias & Imod ajusted Tx with 5 dB – PRB7 Tx with 5 dB – K28.5 TxRX with 5 dB – K28.5

Results of Testing (This week) Alignment Testing (unconnectorized PD S7912) D21.5 K28.5 PRBS7

Results of Testing (This week) Alignment Testing (unconnectorized PD S7912) D21.5 K28.5 PRBS7 X=13.4,Y=40.5,z=21.35

PD selection

Bill of Materials

Gantt Chart

Plan for Next Week Replace smoked inductor(too much bias current applied) Continue alignment tolerance testing Construct alignment detection graph Start final paper