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The Gigabit Ethernet Technology Transceiver Design for Local

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					Presenter: Nassisa-Geda Techane
 Highlights of the Last Two Weeks

• Midterm paper done!
• More tests to be performed on the board
  – Awaiting calibrated optical test equipment.
• Weekly meetings conducted as usual (2x/wk)
• GANTT chart updated


                                                  2
               The Midterm Paper
  • What’s in the paper?
                          Baseline: Tx
Baseline: Rx



                                         Loop-back
  • Conclusions:
       • the board is functional
       • time and financial constraints satisfied
       • group management proved effective           3
          More on the Loop-Back Test
•        Loop-back test with a 5-dB attenuator:
                        (VCSEL @ max Ibias & Imod)
    i.    between the VCSEL and PD
        –    no perceivable eye-diagram
    ii. between the VCSEL and the Rx of GDS1250
        –    clear eye-diagram
•         Why?
    –      not enough P from the VCSEL, even @ max Ibias & Imod
    –      PD not sensitive enough to discern attenuated signal

                                                          4
       Preparation for Run-2
• More tests pending
  – Awaiting calibrated optical test equipment.
• What’s next:
  – Financial budget:
     • out of the $350.00, $142.55 left for Run-2
  – Time:
     • the design of Run-2 running late; HOWEVER,
        – things won’t go bad since the schedule is revised

                                                              5
6
    Plans for the Coming Week

• Perform the remaining tests as the
    calibrated optical test equipment becomes
    available.
•   Start designing Run-2
•   Finalize the budget/vendor details for Run-2
•    …
•    And, the weekly meetings
                                              7

				
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posted:9/19/2011
language:English
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