Power Budget has been Verified Built a New Tx Board and the results are promising

ECE 4006B Fall, 2002, Group 3, ROBIEL TECLEMICHAEL Progress Report Period (November 7-14, 2002)

• Power Budget has been Verified

• Built a New Tx Board and the results are promising

• Performed Alignment Tolerance Tests on Rx.

• Big Obstacle!!!!!The System Test Module was

Down NO EYE

Progress:

• Continue Working on Tx Board

• Continue Alignment Tolerance

Tests on other PD

Next Week:

ECE 4006B Fall, 2002, Group 3, ROBIEL TECLEMICHAEL Progress Report Period (November 7-14, 2002)

Tx Board Debugging• Built new board• Recalculated Rmod• Replaced 1K Rmod

POT with 20K POT• Lowered VCSEL to less

than 4mm from board• Cut off VCSEL leads

Next step:

•Build and test new TxPotential Problem

•Driving Imod too high could have effected the chip or VCSEL

ECE 4006B Fall, 2002, Group 3, ROBIEL TECLEMICHAEL Progress Report Period (November 7-14, 2002

Preliminary Transmitter Board Test Results- PRBS7

ECE 4006B Fall, 2002, Group 3, ROBIEL TECLEMICHAEL Progress Report Period (November 7-14, 2002

XYZ-TEST for Z Higher by 0.87mm

-15

-10

-5

0

5

10

15

-10 -5 0 5 10 15

XYZ-Test of RX Board (PD-Hamamatsu S7911)

-25

-20

-15

-10

-5

0

5

10

15

20

25

-30 -20 -10 0 10 20 30

XYZ-Test of RX Board (PD-Hamamatsu S7911)

-25

-20

-15

-10

-5

0

5

10

15

20

25

-30 -20 -10 0 10 20 30

z=0 z=0.87mm

Units: x10 microns

ECE 4006B Fall, 2002, Group 3, ROBIEL TECLEMICHAEL Progress Report Period (November 7-14, 2002)

Center of Measurement Sample 10 Points

Eye for raised Z by 0.87mm

REV 03 22-Aug 29-Aug 5-Sep 12-Sep 19-Sep 26-Sep 3-Oct 10-Oct 17-Oct 24-Oct 31-Oct 7-Nov 14-Nov 21-Nov 28-Nov 5-Dec

Research PMeasurements/Lab Work A

Optical Link Budget POrder VCSEL and PDs O O E

Design optical Rx w/ on-board PD R R RDesign optical Tx w/on-board VCSEL D D &

Design Rx PCB E E CDesign TX PCB R R A

Lay out & submit Rx & Tx PCB TAseemble Rx & Tx PCB C

Measurements/Lab Work HAnalyze results

Papers Due 3pm U 3pmExam P

Expected Actual

XYZ-Test of RX Board (PD-Hamamatsu S7911)

-25

-20

-15

-10

-5

0

5

10

15

20

25

-30 -20 -10 0 10 20 30

Units: x10 microns

XYZ-TEST for Z Higher by 0.87mm

-15

-10

-5

0

5

10

15

-10 -5 0 5 10

Units: x10 microns