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Gigabit Ethernet TxRx

ECE164.02 Group 2 – Presentation 4. Gigabit Ethernet TxRx. Andrew Tupper. February 26, 2004. Current & Completed Tasks Fix & Test Rx Test Board Build Tx Test Board Contact Vendors of VCSELs & PDs Tx & Rx Schematic Diagrams Begin PCB Design Revise Gantt Chart. Gigabit Ethernet.

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Gigabit Ethernet TxRx

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  1. ECE164.02 Group 2 – Presentation 4 Gigabit Ethernet TxRx Andrew Tupper February 26, 2004

  2. Current & Completed Tasks Fix & Test Rx Test Board Build Tx Test Board Contact Vendors of VCSELs & PDs Tx & Rx Schematic Diagrams Begin PCB Design Revise Gantt Chart Gigabit Ethernet Summary 2/19-2/26 Upcoming Tasks • Complete PCB Design • Order PCB’s • Complete & Test Tx Test Board Group 2 – Presentation 4 February 26, 2004

  3. Gigabit Ethernet Rx Test Board • Initial problem caused by faulty power connection • No recognizable signal Group 2 – Presentation 4 February 26, 2004

  4. Gigabit Ethernet Rx Test Board • Replaced power connectors with correct, on-chip style connectors • Rx test board works! Group 2 – Presentation 4 February 26, 2004

  5. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 0dB attenuation • 1 minute B.E.R. of 2.8E-08 • Receiver is overdriven Group 2 – Presentation 4 February 26, 2004

  6. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 10dB attenuation • 1 minute B.E.R. of 0.0E-9 Group 2 – Presentation 4 February 26, 2004

  7. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 20dB attenuation • 1 minute B.E.R. of 0.0E-9 Group 2 – Presentation 4 February 26, 2004

  8. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 30dB attenuation • 1 minute B.E.R. of 0.0E-9 Group 2 – Presentation 4 February 26, 2004

  9. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 40dB attenuation • 1 minute B.E.R. of 0.0E-9 Group 2 – Presentation 4 February 26, 2004

  10. Gigabit Ethernet Rx Test Board • Scope set to 2 second persistence • 50dB attenuation • 1 minute B.E.R. of 2.2E-1 • Signal Loss • B.E.R. becomes unacceptable at 42dB attenuation Group 2 – Presentation 4 February 26, 2004

  11. Gigabit Ethernet Tx Test Board • Completely assembled Tx test board, excluding SMA outputs… Group 2 – Presentation 4 February 26, 2004

  12. Gigabit Ethernet Tx Test Board • Tx outputs are shorted to ground! • Waiting on engraver to complete assembly Group 2 – Presentation 4 February 26, 2004

  13. Gigabit Ethernet PDs & VCSELs • Secured sample HFE438x-522 VCSEL from Honeywell • Difficulty contacting Luxnet in search of VG1A 9001 VCSEL • In contact with OSI and Hamamatsu for PDs: may have to collaborate with group 1 to meet minimum order requiremetns Group 2 – Presentation 4 February 26, 2004

  14. Gigabit Ethernet Rx Schematic • Generated Rx schematic in ExpressSCH Group 2 – Presentation 4 February 26, 2004

  15. Gigabit Ethernet Tx Schematic • Generated Tx schematic in ExpressSCH Group 2 – Presentation 4 February 26, 2004

  16. Gigabit Ethernet PCB Layout • Began board layout with ExpressPCB • Waiting on final approval of schematics before moving ahead with PCB layout Group 2 – Presentation 4 February 26, 2004

  17. Gigabit Ethernet PCB Layout

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